Detect used C++ standard library (#4793)

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

.clang-tidy

@@ -1,5 +1,4 @@
 # TODO: The first three checks are only removed to get the CI going. They have to be addressed at some point.
-# TODO: portability-avoid-pragma-once: should be fixed eventually
 
 Checks: '*,
 
@@ -22,7 +21,6 @@ Checks: '*,
          -cppcoreguidelines-avoid-magic-numbers,
          -cppcoreguidelines-avoid-non-const-global-variables,
          -cppcoreguidelines-macro-usage,
-         -cppcoreguidelines-pro-bounds-avoid-unchecked-container-access,
          -cppcoreguidelines-pro-bounds-array-to-pointer-decay,
          -cppcoreguidelines-pro-bounds-constant-array-index,
          -cppcoreguidelines-pro-bounds-pointer-arithmetic,
@@ -35,7 +33,6 @@ Checks: '*,
          -fuchsia-overloaded-operator,
          -google-explicit-constructor,
          -google-readability-function-size,
-         -google-runtime-float,
          -google-runtime-int,
          -google-runtime-references,
          -hicpp-avoid-goto,
@@ -47,8 +44,6 @@ Checks: '*,
          -hicpp-uppercase-literal-suffix,
          -llvm-header-guard,
          -llvm-include-order,
-         -llvm-prefer-static-over-anonymous-namespace,
-         -llvm-use-ranges,
          -llvmlibc-*,
          -misc-use-anonymous-namespace,
          -misc-confusable-identifiers,
@@ -64,16 +59,13 @@ Checks: '*,
          -modernize-use-std-numbers,
          -modernize-use-trailing-return-type,
          -performance-enum-size,
-         -portability-avoid-pragma-once,
          -readability-function-cognitive-complexity,
          -readability-function-size,
          -readability-identifier-length,
          -readability-magic-numbers,
          -readability-redundant-access-specifiers,
-         -readability-redundant-parentheses,
          -readability-simplify-boolean-expr,
-         -readability-uppercase-literal-suffix,
+         -readability-uppercase-literal-suffix'
-         -readability-use-concise-preprocessor-directives'
 
 CheckOptions:
   - key: hicpp-special-member-functions.AllowSoleDefaultDtor

.github/CONTRIBUTING.md

@@ -153,9 +153,6 @@ files directly; instead, modify the include/nlohmann sources and regenerate the
 make amalgamate
 ```
 
-Running `make amalgamate` will also apply automatic formatting to the source files using
-[`Artistic Style`](https://astyle.sourceforge.net/). This formatting may modify your source files in-place. Be certain to review and commit any changes to avoid unintended formatting diffs in commits.
-
 ## Recommended documentation
 
 - The library’s [README file](https://github.com/nlohmann/json/blob/master/README.md) is an excellent starting point to

.github/ISSUE_TEMPLATE/bug.yaml

@@ -14,8 +14,6 @@ body:
         Note that this form is for bug reports only. Please
         [open a discussion](https://github.com/nlohmann/json/discussions/new)
         for questions, feature requests, or support requests.
-        **Please check the [FAQ](https://json.nlohmann.me/home/faq/) before
-        reporting an issue.** Common questions are answered there.        
   - type: textarea
     id: summary
     attributes:

.github/workflows/check_amalgamation.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+        uses: step-security/harden-runner@0634a2670c59f64b4a01f0f96f84700a4088b9f0 # v2.12.0
         with:
           egress-policy: audit
 
@@ -20,7 +20,7 @@ jobs:
           mkdir -p ./pr
           echo ${{ github.event.number }} > ./pr/number
           echo ${{ github.event.pull_request.user.login }} > ./pr/author
-      - uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
+      - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: pr
           path: pr/
@@ -34,18 +34,18 @@ jobs:
 
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+        uses: step-security/harden-runner@0634a2670c59f64b4a01f0f96f84700a4088b9f0 # v2.12.0
         with:
           egress-policy: audit
 
       - name: Checkout pull request
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           path: main
           ref: ${{ github.event.pull_request.head.sha }}
 
       - name: Checkout tools
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           path: tools
           ref: develop

.github/workflows/cifuzz.yml

@@ -6,29 +6,29 @@ permissions:
 
 jobs:
   Fuzzing:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     steps:
     - name: Harden Runner
-      uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+      uses: step-security/harden-runner@0634a2670c59f64b4a01f0f96f84700a4088b9f0 # v2.12.0
       with:
         egress-policy: audit
 
     - name: Build Fuzzers
       id: build
-      uses: google/oss-fuzz/infra/cifuzz/actions/build_fuzzers@master
+      uses: google/oss-fuzz/infra/cifuzz/actions/build_fuzzers@57fe4475324c5506adbfecdcdd2917f65c86ee9e # master
       with:
         oss-fuzz-project-name: 'json'
         dry-run: false
         language: c++
     - name: Run Fuzzers
-      uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@master
+      uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@57fe4475324c5506adbfecdcdd2917f65c86ee9e # master
       with:
         oss-fuzz-project-name: 'json'
         fuzz-seconds: 300
         dry-run: false
         language: c++
     - name: Upload Crash
-      uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
+      uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
       if: failure() && steps.build.outcome == 'success'
       with:
         name: artifacts

.github/workflows/codeql-analysis.yml

@@ -27,23 +27,23 @@ jobs:
 
     steps:
     - name: Harden Runner
-      uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+      uses: step-security/harden-runner@0634a2670c59f64b4a01f0f96f84700a4088b9f0 # v2.12.0
       with:
         egress-policy: audit
 
     - name: Checkout repository
-      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@9e907b5e64f6b83e7804b09294d44122997950d6 # v4.32.3
+      uses: github/codeql-action/init@ff0a06e83cb2de871e5a09832bc6a81e7276941f # v3.28.18
       with:
         languages: c-cpp
 
     # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
     # If this step fails, then you should remove it and run the build manually (see below)
     - name: Autobuild
-      uses: github/codeql-action/autobuild@9e907b5e64f6b83e7804b09294d44122997950d6 # v4.32.3
+      uses: github/codeql-action/autobuild@ff0a06e83cb2de871e5a09832bc6a81e7276941f # v3.28.18
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@9e907b5e64f6b83e7804b09294d44122997950d6 # v4.32.3
+      uses: github/codeql-action/analyze@ff0a06e83cb2de871e5a09832bc6a81e7276941f # v3.28.18

.github/workflows/comment_check_amalgamation.yml

@@ -19,12 +19,12 @@ jobs:
       pull-requests: write
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+        uses: step-security/harden-runner@0634a2670c59f64b4a01f0f96f84700a4088b9f0 # v2.12.0
         with:
           egress-policy: audit
 
       - name: 'Download artifact'
-        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
+        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
         with:
           script: |
             var artifacts = await github.rest.actions.listWorkflowRunArtifacts({
@@ -46,7 +46,7 @@ jobs:
       - run: unzip pr.zip
 
       - name: 'Comment on PR'
-        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
+        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           script: |

.github/workflows/dependency-review.yml

@@ -17,11 +17,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+        uses: step-security/harden-runner@0634a2670c59f64b4a01f0f96f84700a4088b9f0 # v2.12.0
         with:
           egress-policy: audit
 
       - name: 'Checkout Repository'
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: 'Dependency Review'
-        uses: actions/dependency-review-action@3c4e3dcb1aa7874d2c16be7d79418e9b7efd6261 # v4.8.2
+        uses: actions/dependency-review-action@da24556b548a50705dd671f47852072ea4c105d9 # v4.7.1

.github/workflows/flawfinder.yml

@@ -1,46 +0,0 @@
-# This workflow uses actions that are not certified by GitHub.
-# They are provided by a third-party and are governed by
-# separate terms of service, privacy policy, and support
-# documentation.
-
-name: flawfinder
-
-permissions:
-  contents: read
-
-on:
-  push:
-    branches: [ "develop" ]
-  pull_request:
-    # The branches below must be a subset of the branches above
-    branches: [ "develop" ]
-  schedule:
-    - cron: '41 14 * * 3'
-
-jobs:
-  flawfinder:
-    name: Flawfinder
-    runs-on: ubuntu-latest
-    permissions:
-      actions: read
-      contents: read
-      security-events: write
-    steps:
-      - name: Harden Runner
-        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
-        with:
-          egress-policy: audit
-
-      - name: Checkout code
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-
-      - name: flawfinder_scan
-        uses: david-a-wheeler/flawfinder@c57197cd6061453f10a496f30a732bc1905918d1 # v2.0.19
-        with:
-          arguments: '--sarif ./'
-          output: 'flawfinder_results.sarif'
-
-      - name: Upload analysis results to GitHub Security tab
-        uses: github/codeql-action/upload-sarif@9e907b5e64f6b83e7804b09294d44122997950d6 # v4
-        with:
-          sarif_file: ${{github.workspace}}/flawfinder_results.sarif

.github/workflows/labeler.yml

@@ -17,10 +17,10 @@ jobs:
 
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+        uses: step-security/harden-runner@0634a2670c59f64b4a01f0f96f84700a4088b9f0 # v2.12.0
         with:
           egress-policy: audit
 
-      - uses: srvaroa/labeler@471cdb892ebac76de6cb869105a2017fa3b9b9b3 # master
+      - uses: srvaroa/labeler@e7bef2249506ba9cbbd3ca5cee256abd9f930b04 # master
         env:
           GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"

.github/workflows/macos.yml

@@ -27,7 +27,7 @@ jobs:
 #      DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode }}.app/Contents/Developer
 #
 #    steps:
-#      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+#      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 #      - name: Run CMake
 #        run: cmake -S . -B build -D CMAKE_BUILD_TYPE=Debug -DJSON_BuildTests=On -DJSON_FastTests=ON
 #      - name: Build
@@ -45,7 +45,7 @@ jobs:
 #      DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode }}.app/Contents/Developer
 #
 #    steps:
-#      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+#      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 #      - name: Run CMake
 #        run: cmake -S . -B build -D CMAKE_BUILD_TYPE=Debug -DJSON_BuildTests=On -DJSON_FastTests=ON
 #      - name: Build
@@ -53,34 +53,33 @@ jobs:
 #      - name: Test
 #        run: cd build ; ctest -j 10 --output-on-failure
 
-# macos-13 is deprecated (https://github.com/actions/runner-images/issues/13046)
+  macos-13:
-#  macos-13:
+    runs-on: macos-13 # https://github.com/actions/runner-images/blob/main/images/macos/macos-13-Readme.md
-#    runs-on: macos-13 # https://github.com/actions/runner-images/blob/main/images/macos/macos-13-Readme.md
+    strategy:
-#    strategy:
+      matrix:
-#      matrix:
+        xcode: ['14.1', '14.2', '14.3', '14.3.1', '15.0.1', '15.1', '15.2']
-#        xcode: ['14.1', '14.2', '14.3', '14.3.1', '15.0.1', '15.1', '15.2']
+    env:
-#    env:
+      DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode }}.app/Contents/Developer
-#      DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode }}.app/Contents/Developer
+
-#
+    steps:
-#    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
-#      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - name: Run CMake
-#      - name: Run CMake
+        run: cmake -S . -B build -D CMAKE_BUILD_TYPE=Debug -DJSON_BuildTests=On -DJSON_FastTests=ON
-#        run: cmake -S . -B build -D CMAKE_BUILD_TYPE=Debug -DJSON_BuildTests=On -DJSON_FastTests=ON
+      - name: Build
-#      - name: Build
+        run: cmake --build build --parallel 10
-#        run: cmake --build build --parallel 10
+      - name: Test
-#      - name: Test
+        run: cd build ; ctest -j 10 --output-on-failure
-#        run: cd build ; ctest -j 10 --output-on-failure
 
   macos-14:
     runs-on: macos-14 # https://github.com/actions/runner-images/blob/main/images/macos/macos-14-Readme.md
     strategy:
       matrix:
-        xcode: ['15.0.1', '15.1', '15.2', '15.3', '15.4']
+        xcode: ['15.3', '15.4']
     env:
       DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode }}.app/Contents/Developer
 
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Run CMake
         run: cmake -S . -B build -D CMAKE_BUILD_TYPE=Debug -DJSON_BuildTests=On -DJSON_FastTests=ON
       - name: Build
@@ -92,12 +91,12 @@ jobs:
     runs-on: macos-15 # https://github.com/actions/runner-images/blob/main/images/macos/macos-15-Readme.md
     strategy:
       matrix:
-        xcode: ['16.0', '16.1', '16.2', '16.3', '16.4', '26.0.1']
+        xcode: ['16.0', '16.1', '16.2']
     env:
       DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode }}.app/Contents/Developer
 
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Run CMake
         run: cmake -S . -B build -D CMAKE_BUILD_TYPE=Debug -DJSON_BuildTests=On -DJSON_FastTests=ON
       - name: Build
@@ -112,7 +111,7 @@ jobs:
         standard: [11, 14, 17, 20, 23, 26]
 
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Run CMake
         run: cmake -S . -B build -D CMAKE_BUILD_TYPE=Debug -DJSON_BuildTests=On -DJSON_TestStandards=${{ matrix.standard }}
       - name: Build

.github/workflows/publish_documentation.yml

@@ -27,11 +27,11 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+        uses: step-security/harden-runner@0634a2670c59f64b4a01f0f96f84700a4088b9f0 # v2.12.0
         with:
           egress-policy: audit
 
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Install virtual environment
         run: make install_venv -C docs/mkdocs

.github/workflows/scorecards.yml

@@ -36,17 +36,17 @@ jobs:
 
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+        uses: step-security/harden-runner@0634a2670c59f64b4a01f0f96f84700a4088b9f0 # v2.12.0
         with:
           egress-policy: audit
 
       - name: "Checkout code"
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           persist-credentials: false
 
       - name: "Run analysis"
-        uses: ossf/scorecard-action@4eaacf0543bb3f2c246792bd56e8cdeffafb205a # v2.4.3
+        uses: ossf/scorecard-action@f49aabe0b5af0936a0987cfb85d86b75731b0186 # v2.4.1
         with:
           results_file: results.sarif
           results_format: sarif
@@ -68,7 +68,7 @@ jobs:
       # Upload the results as artifacts (optional). Commenting out will disable uploads of run results in SARIF
       # format to the repository Actions tab.
       - name: "Upload artifact"
-        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: SARIF file
           path: results.sarif
@@ -76,6 +76,6 @@ jobs:
 
       # Upload the results to GitHub's code scanning dashboard.
       - name: "Upload to code-scanning"
-        uses: github/codeql-action/upload-sarif@9e907b5e64f6b83e7804b09294d44122997950d6 # v4.32.3
+        uses: github/codeql-action/upload-sarif@ff0a06e83cb2de871e5a09832bc6a81e7276941f # v3.28.18
         with:
           sarif_file: results.sarif

.github/workflows/semgrep.yml

@@ -1,54 +0,0 @@
-# This workflow uses actions that are not certified by GitHub.
-# They are provided by a third-party and are governed by
-# separate terms of service, privacy policy, and support
-# documentation.
-
-# This workflow file requires a free account on Semgrep.dev to
-# manage rules, file ignores, notifications, and more.
-#
-# See https://semgrep.dev/docs
-
-name: Semgrep
-
-on:
-  push:
-    branches: [ "develop" ]
-  pull_request:
-    # The branches below must be a subset of the branches above
-    branches: [ "develop" ]
-  schedule:
-    - cron: '23 2 * * 4'
-
-permissions:
-  contents: read
-
-jobs:
-  semgrep:
-    permissions:
-      contents: read # for actions/checkout to fetch code
-      security-events: write # for github/codeql-action/upload-sarif to upload SARIF results
-      actions: read # only required for a private repository by github/codeql-action/upload-sarif to get the Action run status
-    name: Scan
-    runs-on: ubuntu-latest
-    steps:
-      - name: Harden Runner
-        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
-        with:
-          egress-policy: audit
-
-      # Checkout project source
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-
-      # Scan code using project's configuration on https://semgrep.dev/manage
-      - uses: returntocorp/semgrep-action@713efdd345f3035192eaa63f56867b88e63e4e5d
-        with:
-          publishToken: ${{ secrets.SEMGREP_APP_TOKEN }}
-          publishDeployment: ${{ secrets.SEMGREP_DEPLOYMENT_ID }}
-          generateSarif: "1"
-
-      # Upload SARIF file generated in previous step
-      - name: Upload SARIF file
-        uses: github/codeql-action/upload-sarif@9e907b5e64f6b83e7804b09294d44122997950d6 # v4
-        with:
-          sarif_file: semgrep.sarif
-        if: always()

.github/workflows/stale.yml

@@ -16,11 +16,11 @@ jobs:
 
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+        uses: step-security/harden-runner@0634a2670c59f64b4a01f0f96f84700a4088b9f0 # v2.12.0
         with:
           egress-policy: audit
 
-      - uses: actions/stale@997185467fa4f803885201cee163a9f38240193d # v10.1.1
+      - uses: actions/stale@5bef64f19d7facfb25b37b414482c7164d639639 # v9.1.0
         with:
           stale-issue-label: 'state: stale'
           stale-pr-label: 'state: stale'

.github/workflows/ubuntu.yml

@@ -21,9 +21,9 @@ jobs:
     runs-on: ubuntu-latest
     container: gcc:latest
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@dc05ee1ee5ba69770230c73a6a4e947595745cab # v4.2.2
+        uses: lukka/get-cmake@ea004816823209b8d1211e47b216185caee12cc5 # v4.02
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build
@@ -33,7 +33,7 @@ jobs:
     runs-on: ubuntu-latest
     container: ghcr.io/nlohmann/json-ci:v2.4.0
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build
@@ -46,15 +46,15 @@ jobs:
         target: [ci_test_amalgamation, ci_test_single_header, ci_cppcheck, ci_cpplint, ci_reproducible_tests, ci_non_git_tests, ci_offline_testdata, ci_reuse_compliance, ci_test_valgrind]
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+        uses: step-security/harden-runner@0634a2670c59f64b4a01f0f96f84700a4088b9f0 # v2.12.0
         with:
           egress-policy: audit
 
       - name: Install Valgrind
         run: sudo apt-get update ; sudo apt-get install -y valgrind
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@dc05ee1ee5ba69770230c73a6a4e947595745cab # v4.2.2
+        uses: lukka/get-cmake@ea004816823209b8d1211e47b216185caee12cc5 # v4.02
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build
@@ -69,9 +69,9 @@ jobs:
     steps:
       - name: Install git, clang-tools, iwyu (ci_single_binaries), and unzip
         run: apt-get update ; apt-get install -y git clang-tools iwyu unzip
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@dc05ee1ee5ba69770230c73a6a4e947595745cab # v4.2.2
+        uses: lukka/get-cmake@ea004816823209b8d1211e47b216185caee12cc5 # v4.02
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build
@@ -86,9 +86,9 @@ jobs:
     steps:
       - name: Install build-essential
         run: apt-get update ; apt-get install -y build-essential unzip wget git libssl-dev
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@dc05ee1ee5ba69770230c73a6a4e947595745cab # v4.2.2
+        uses: lukka/get-cmake@ea004816823209b8d1211e47b216185caee12cc5 # v4.02
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build
@@ -98,11 +98,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+        uses: step-security/harden-runner@0634a2670c59f64b4a01f0f96f84700a4088b9f0 # v2.12.0
         with:
           egress-policy: audit
 
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Install dependencies and de_DE locale
         run: |
           sudo apt-get clean
@@ -115,16 +115,15 @@ jobs:
       - name: Build
         run: cmake --build build --target ci_test_coverage
       - name: Archive coverage report
-        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: code-coverage-report
           path: ${{ github.workspace }}/build/html
       - name: Publish report to Coveralls
-        uses: coverallsapp/github-action@5cbfd81b66ca5d10c19b062c04de0199c215fb6e # v2.3.7
+        uses: coverallsapp/github-action@648a8eb78e6d50909eff900e4ec85cab4524a45b # v2.3.6
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           path-to-lcov: ${{ github.workspace }}/build/json.info.filtered.noexcept
-          fail-on-error: false
 
   ci_test_compilers_gcc_old:
     runs-on: ubuntu-latest
@@ -133,7 +132,7 @@ jobs:
         compiler: ['4.8', '4.9', '5', '6']
     container: ghcr.io/nlohmann/json-ci:v2.4.0
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Run CMake
         run: CXX=g++-${{ matrix.compiler }} cmake -S . -B build -DJSON_CI=On
       - name: Build
@@ -147,9 +146,9 @@ jobs:
         compiler: ['7', '8', '9', '10', '11', '12', '13', '14', '15', 'latest']
     container: gcc:${{ matrix.compiler }}
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@dc05ee1ee5ba69770230c73a6a4e947595745cab # v4.2.2
+        uses: lukka/get-cmake@ea004816823209b8d1211e47b216185caee12cc5 # v4.02
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build
@@ -162,9 +161,11 @@ jobs:
         compiler: ['3.4', '3.5', '3.6', '3.7', '3.8', '3.9', '4', '5', '6', '7', '8', '9', '10', '11', '12', '13', '14', '15-bullseye', '16', '17', '18', '19', '20', 'latest']
     container: silkeh/clang:${{ matrix.compiler }}
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - name: Install unzip and git
+        run: apt-get update ; apt-get install -y unzip git
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@dc05ee1ee5ba69770230c73a6a4e947595745cab # v4.2.2
+        uses: lukka/get-cmake@ea004816823209b8d1211e47b216185caee12cc5 # v4.02
       - name: Set env FORCE_STDCPPFS_FLAG for clang 7 / 8 / 9 / 10
         run: echo "JSON_FORCED_GLOBAL_COMPILE_OPTIONS=-DJSON_HAS_FILESYSTEM=0;-DJSON_HAS_EXPERIMENTAL_FILESYSTEM=0" >> "$GITHUB_ENV"
         if: ${{ matrix.compiler == '7' || matrix.compiler == '8' || matrix.compiler == '9' || matrix.compiler == '10' }}
@@ -180,9 +181,9 @@ jobs:
       matrix:
         standard: [11, 14, 17, 20, 23, 26]
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@dc05ee1ee5ba69770230c73a6a4e947595745cab # v4.2.2
+        uses: lukka/get-cmake@ea004816823209b8d1211e47b216185caee12cc5 # v4.02
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build
@@ -198,9 +199,9 @@ jobs:
     steps:
       - name: Install git and unzip
         run: apt-get update ; apt-get install -y git unzip
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@dc05ee1ee5ba69770230c73a6a4e947595745cab # v4.2.2
+        uses: lukka/get-cmake@ea004816823209b8d1211e47b216185caee12cc5 # v4.02
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build with libc++
@@ -214,7 +215,7 @@ jobs:
     runs-on: ubuntu-latest
     container: ghcr.io/nlohmann/json-ci:v2.4.0
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build
@@ -227,9 +228,9 @@ jobs:
     runs-on: ubuntu-latest
     container: ${{ matrix.container }}
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@dc05ee1ee5ba69770230c73a6a4e947595745cab # v4.2.2
+        uses: lukka/get-cmake@ea004816823209b8d1211e47b216185caee12cc5 # v4.02
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build
@@ -239,7 +240,7 @@ jobs:
     runs-on: ubuntu-latest
     container: ghcr.io/nlohmann/json-ci:v2.2.0
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build
@@ -251,15 +252,15 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+        uses: step-security/harden-runner@0634a2670c59f64b4a01f0f96f84700a4088b9f0 # v2.12.0
         with:
           egress-policy: audit
 
       - name: Install emscripten
-        uses: mymindstorm/setup-emsdk@6ab9eb1bda2574c4ddb79809fc9247783eaf9021 # v14
+        uses: mymindstorm/setup-emsdk@v14
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@dc05ee1ee5ba69770230c73a6a4e947595745cab # v4.2.2
+        uses: lukka/get-cmake@ea004816823209b8d1211e47b216185caee12cc5 # v4.02
       - name: Run CMake
         run: cmake -S . -B build -DCMAKE_TOOLCHAIN_FILE=$EMSDK/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake -GNinja
       - name: Build
@@ -272,11 +273,11 @@ jobs:
         target: [ci_test_examples, ci_test_build_documentation]
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+        uses: step-security/harden-runner@0634a2670c59f64b4a01f0f96f84700a4088b9f0 # v2.12.0
         with:
           egress-policy: audit
 
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build

.github/workflows/windows.yml

@@ -18,15 +18,15 @@ concurrency:
 
 jobs:
   mingw:
-    runs-on: windows-2022
+    runs-on: windows-2019
     strategy:
       matrix:
         architecture: [x64, x86]
 
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Set up MinGW
-        uses: egor-tensin/setup-mingw@41b837e47d7f85214629d255b9c4bc3fcbe9fd63 # v3.0
+        uses: egor-tensin/setup-mingw@84c781b557efd538dec66bde06988d81cd3138cf # v2.2.0
         with:
           platform: ${{ matrix.architecture }}
           version: 12.2.0 # https://github.com/egor-tensin/setup-mingw/issues/14
@@ -40,14 +40,24 @@ jobs:
   msvc:
     strategy:
       matrix:
+        runs_on: [windows-2019, windows-2022]
         build_type: [Debug, Release]
         architecture: [Win32, x64]
         std_version: [default, latest]
 
-    runs-on: windows-2022
+    runs-on: ${{ matrix.runs_on }}
 
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Set generator
+        id: generator
+        run: |
+          if [ "${{ matrix.runs_on }}" = "windows-2019" ]; then
+            echo "generator=Visual Studio 16 2019" >> $GITHUB_ENV
+          else
+            echo "generator=Visual Studio 17 2022" >> $GITHUB_ENV
+          fi
+        shell: bash
       - name: Set extra CXX_FLAGS for latest std_version
         id: cxxflags
         run: |
@@ -58,11 +68,11 @@ jobs:
           fi
         shell: bash
       - name: Run CMake (Release)
-        run: cmake -S . -B build -G "Visual Studio 17 2022" -A ${{ matrix.architecture }} -DJSON_BuildTests=On -DCMAKE_CXX_FLAGS="$env:flags"
+        run: cmake -S . -B build -G "$env:generator" -A ${{ matrix.architecture }} -DJSON_BuildTests=On -DCMAKE_CXX_FLAGS="$env:flags"
         if: matrix.build_type == 'Release'
         shell: pwsh
       - name: Run CMake (Debug)
-        run: cmake -S . -B build -G "Visual Studio 17 2022" -A ${{ matrix.architecture }} -DJSON_BuildTests=On -DJSON_FastTests=ON -DCMAKE_CXX_FLAGS="$env:flags"
+        run: cmake -S . -B build -G "$env:generator" -A ${{ matrix.architecture }} -DJSON_BuildTests=On -DJSON_FastTests=ON -DCMAKE_CXX_FLAGS="$env:flags"
         if: matrix.build_type == 'Debug'
         shell: pwsh
       - name: Build
@@ -71,54 +81,33 @@ jobs:
         run: cd build ; ctest -j 10 -C ${{ matrix.build_type }} --output-on-failure
 
   clang:
-    runs-on: windows-2022
+    runs-on: windows-2019
     strategy:
       matrix:
-        version: [11.0.1, 12.0.1, 13.0.1, 14.0.6, 15.0.7, 16.0.6, 18.1.8, 19.1.7, 20.1.8]
+        version: [11, 12, 13, 14, 15]
 
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Install Clang
-        run: curl -fsSL -o LLVM${{ matrix.version }}.exe https://github.com/llvm/llvm-project/releases/download/llvmorg-${{ matrix.version }}/LLVM-${{ matrix.version }}-win64.exe ; 7z x LLVM${{ matrix.version }}.exe -y -o"C:/Program Files/LLVM"
+        run: curl -fsSL -o LLVM${{ matrix.version }}.exe https://github.com/llvm/llvm-project/releases/download/llvmorg-${{ matrix.version }}.0.0/LLVM-${{ matrix.version }}.0.0-win64.exe ; 7z x LLVM${{ matrix.version }}.exe -y -o"C:/Program Files/LLVM"
-      - name: Set up MinGW
-        uses: egor-tensin/setup-mingw@41b837e47d7f85214629d255b9c4bc3fcbe9fd63 # v3.0
-        with:
-          platform: x64
-          version: 12.2.0 # https://github.com/egor-tensin/setup-mingw/issues/14
       - name: Run CMake
-        run: cmake -S . -B build ^
+        run: cmake -S . -B build -DCMAKE_CXX_COMPILER="C:/Program Files/LLVM/bin/clang++.exe" -G"MinGW Makefiles" -DCMAKE_BUILD_TYPE=Debug -DJSON_BuildTests=On
-             -DCMAKE_CXX_COMPILER="C:/Program Files/LLVM/bin/clang++.exe" ^
-             -DCMAKE_CXX_FLAGS="--target=x86_64-w64-mingw32 -stdlib=libstdc++ -pthread" ^
-             -DCMAKE_EXE_LINKER_FLAGS="-lwinpthread" ^
-             -G"MinGW Makefiles" ^
-             -DCMAKE_BUILD_TYPE=Debug ^
-             -DJSON_BuildTests=On
       - name: Build
         run: cmake --build build --parallel 10
       - name: Test
         run: cd build ; ctest -j 10 -C Debug --exclude-regex "test-unicode" --output-on-failure
 
   clang-cl-12:
-    runs-on: windows-2022
+    runs-on: windows-2019
     strategy:
       matrix:
         architecture: [Win32, x64]
 
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Run CMake
-        run: cmake -S . -B build -G "Visual Studio 17 2022" -A ${{ matrix.architecture }} -T ClangCL -DJSON_BuildTests=On
+        run: cmake -S . -B build -G "Visual Studio 16 2019" -A ${{ matrix.architecture }} -T ClangCL -DJSON_BuildTests=On
       - name: Build
         run: cmake --build build --config Debug --parallel 10
       - name: Test
         run: cd build ; ctest -j 10 -C Debug --exclude-regex "test-unicode" --output-on-failure
-
-  ci_module_cpp20:
-    runs-on: windows-latest
-    steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - name: Run CMake (Debug)
-        run: cmake -S . -B build -G "Visual Studio 17 2022" -DJSON_CI=ON -DCMAKE_CXX_FLAGS="/permissive- /std:c++latest /utf-8 /W4 /WX"
-      - name: Build
-        run: cmake --build build --config Debug --target ci_module_cpp20
-        

.reuse/dep5

@@ -4,7 +4,7 @@ Upstream-Contact: Niels Lohmann <mail@nlohmann.me>
 Source: https://github.com/nlohmann/json
 
 Files: *
-Copyright: 2013-2026 Niels Lohmann <https://nlohmann.me>
+Copyright: 2013-2025 Niels Lohmann <https://nlohmann.me>
 License: MIT
 
 Files: include/nlohmann/thirdparty/hedley.hpp

CMakeLists.txt

@@ -22,18 +22,6 @@ endif()
 set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake ${CMAKE_MODULE_PATH})
 include(ExternalProject)
 
-# ---- C++ Modules Support (optional) ----
-option(NLOHMANN_JSON_BUILD_MODULES "Build C++ modules support" OFF)
-
-if(NLOHMANN_JSON_BUILD_MODULES)
-    if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.28)
-        message(STATUS "Building nlohmann.json C++ module")
-        add_subdirectory(src/modules)
-    else()
-        message(WARNING "Skipping nlohmann.json C++ module (requires CMake 3.28+, found ${CMAKE_VERSION})")
-    endif()
-endif()
-
 ##
 ## OPTIONS
 ##

LICENSE.MIT

@@ -1,6 +1,6 @@
 MIT License 
 
-Copyright (c) 2013-2026 Niels Lohmann
+Copyright (c) 2013-2025 Niels Lohmann
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

LICENSES/CC0-1.0.txt

@@ -1,121 +0,0 @@
-Creative Commons Legal Code
-
-CC0 1.0 Universal
-
-    CREATIVE COMMONS CORPORATION IS NOT A LAW FIRM AND DOES NOT PROVIDE
-    LEGAL SERVICES. DISTRIBUTION OF THIS DOCUMENT DOES NOT CREATE AN
-    ATTORNEY-CLIENT RELATIONSHIP. CREATIVE COMMONS PROVIDES THIS
-    INFORMATION ON AN "AS-IS" BASIS. CREATIVE COMMONS MAKES NO WARRANTIES
-    REGARDING THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS
-    PROVIDED HEREUNDER, AND DISCLAIMS LIABILITY FOR DAMAGES RESULTING FROM
-    THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS PROVIDED
-    HEREUNDER.
-
-Statement of Purpose
-
-The laws of most jurisdictions throughout the world automatically confer
-exclusive Copyright and Related Rights (defined below) upon the creator
-and subsequent owner(s) (each and all, an "owner") of an original work of
-authorship and/or a database (each, a "Work").
-
-Certain owners wish to permanently relinquish those rights to a Work for
-the purpose of contributing to a commons of creative, cultural and
-scientific works ("Commons") that the public can reliably and without fear
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Makefile

@@ -258,8 +258,8 @@ serve_header:
 ##########################################################################
 
 reuse:
-	pipx run reuse annotate --recursive single_include include -tjson --license MIT --copyright "Niels Lohmann <https://nlohmann.me>" --year "2013-2026" --merge-copyrights
+	pipx run reuse annotate --recursive single_include include -tjson --license MIT --copyright "Niels Lohmann <https://nlohmann.me>" --year "2013-2025" --merge-copyrights
-	pipx run reuse annotate $(TESTS_SRCS) -tjson_support --license MIT --copyright "Niels Lohmann <https://nlohmann.me>" --year "2013-2026" --merge-copyrights
+	pipx run reuse annotate $(TESTS_SRCS) -tjson_support --license MIT --copyright "Niels Lohmann <https://nlohmann.me>" --year "2013-2025" --merge-copyrights
 	pipx run reuse lint
 
 spdx:

README.md

@@ -19,7 +19,6 @@
 [![Average time to resolve an issue](https://isitmaintained.com/badge/resolution/nlohmann/json.svg)](https://isitmaintained.com/project/nlohmann/json "Average time to resolve an issue")
 [![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/289/badge)](https://bestpractices.coreinfrastructure.org/projects/289)
 [![OpenSSF Scorecard](https://api.scorecard.dev/projects/github.com/nlohmann/json/badge)](https://scorecard.dev/viewer/?uri=github.com/nlohmann/json)
-[![Backup Status](https://app.cloudback.it/badge/nlohmann/json)](https://cloudback.it)
 [![GitHub Sponsors](https://img.shields.io/badge/GitHub-Sponsors-ff69b4)](https://github.com/sponsors/nlohmann)
 [![REUSE status](https://api.reuse.software/badge/github.com/nlohmann/json)](https://api.reuse.software/info/github.com/nlohmann/json)
 [![Discord](https://img.shields.io/discord/1003743314341793913)](https://discord.gg/6mrGXKvX7y)
@@ -80,7 +79,6 @@ You can sponsor this library at [GitHub Sponsors](https://github.com/sponsors/nl
 
 - [Martti Laine](https://github.com/codeclown)
 - [Paul Harrington](https://github.com/phrrngtn)
-- [Mercedes-Benz Group](https://github.com/mercedes-benz)
 
 ### :label: Named Sponsors
 
@@ -159,19 +157,6 @@ std::ifstream f("example.json");
 json data = json::parse(f);
 ```
 
-If using modules (enabled with `NLOHMANN_JSON_BUILD_MODULES`), this example becomes:
-```cpp
-import std;
-import nlohmann.json;
-
-using json = nlohmann::json;
-
-// ...
-
-std::ifstream f("example.json");
-json data = json::parse(f);
-```
-
 ### Creating `json` objects from JSON literals
 
 Assume you want to create hard-code this literal JSON value in a file, as a `json` object:
@@ -346,7 +331,7 @@ Note the difference between serialization and assignment:
 json j_string = "this is a string";
 
 // retrieve the string value
-auto cpp_string = j_string.get<std::string>();
+auto cpp_string = j_string.template get<std::string>();
 // retrieve the string value (alternative when a variable already exists)
 std::string cpp_string2;
 j_string.get_to(cpp_string2);
@@ -355,7 +340,7 @@ j_string.get_to(cpp_string2);
 std::string serialized_string = j_string.dump();
 
 // output of original string
-std::cout << cpp_string << " == " << cpp_string2 << " == " << j_string.get<std::string>() << '\n';
+std::cout << cpp_string << " == " << cpp_string2 << " == " << j_string.template get<std::string>() << '\n';
 // output of serialized value
 std::cout << j_string << " == " << serialized_string << std::endl;
 ```
@@ -528,7 +513,7 @@ for (auto& element : j) {
 }
 
 // getter/setter
-const auto tmp = j[0].get<std::string>();
+const auto tmp = j[0].template get<std::string>();
 j[1] = 42;
 bool foo = j.at(2);
 
@@ -735,7 +720,7 @@ You can switch off implicit conversions by defining `JSON_USE_IMPLICIT_CONVERSIO
 // strings
 std::string s1 = "Hello, world!";
 json js = s1;
-auto s2 = js.get<std::string>();
+auto s2 = js.template get<std::string>();
 // NOT RECOMMENDED
 std::string s3 = js;
 std::string s4;
@@ -744,7 +729,7 @@ s4 = js;
 // Booleans
 bool b1 = true;
 json jb = b1;
-auto b2 = jb.get<bool>();
+auto b2 = jb.template get<bool>();
 // NOT RECOMMENDED
 bool b3 = jb;
 bool b4;
@@ -753,7 +738,7 @@ b4 = jb;
 // numbers
 int i = 42;
 json jn = i;
-auto f = jn.get<double>();
+auto f = jn.template get<double>();
 // NOT RECOMMENDED
 double f2 = jb;
 double f3;
@@ -796,9 +781,9 @@ j["age"] = p.age;
 
 // convert from JSON: copy each value from the JSON object
 ns::person p {
-    j["name"].get<std::string>(),
+    j["name"].template get<std::string>(),
-    j["address"].get<std::string>(),
+    j["address"].template get<std::string>(),
-    j["age"].get<int>()
+    j["age"].template get<int>()
 };
 ```
 
@@ -815,7 +800,7 @@ std::cout << j << std::endl;
 // {"address":"744 Evergreen Terrace","age":60,"name":"Ned Flanders"}
 
 // conversion: json -> person
-auto p2 = j.get<ns::person>();
+auto p2 = j.template get<ns::person>();
 
 // that's it
 assert(p == p2);
@@ -842,13 +827,13 @@ namespace ns {
 ```
 
 That's all! When calling the `json` constructor with your type, your custom `to_json` method will be automatically called.
-Likewise, when calling `get<your_type>()` or `get_to(your_type&)`, the `from_json` method will be called.
+Likewise, when calling `template get<your_type>()` or `get_to(your_type&)`, the `from_json` method will be called.
 
 Some important things:
 
 - Those methods **MUST** be in your type's namespace (which can be the global namespace), or the library will not be able to locate them (in this example, they are in namespace `ns`, where `person` is defined).
 - Those methods **MUST** be available (e.g., proper headers must be included) everywhere you use these conversions. Look at [issue 1108](https://github.com/nlohmann/json/issues/1108) for errors that may occur otherwise.
-- When using `get<your_type>()`, `your_type` **MUST** be [DefaultConstructible](https://en.cppreference.com/w/cpp/named_req/DefaultConstructible). (There is a way to bypass this requirement described later.)
+- When using `template get<your_type>()`, `your_type` **MUST** be [DefaultConstructible](https://en.cppreference.com/w/cpp/named_req/DefaultConstructible). (There is a way to bypass this requirement described later.)
 - In function `from_json`, use function [`at()`](https://json.nlohmann.me/api/basic_json/at/) to access the object values rather than `operator[]`. In case a key does not exist, `at` throws an exception that you can handle, whereas `operator[]` exhibits undefined behavior.
 - You do not need to add serializers or deserializers for STL types like `std::vector`: the library already implements these.
 
@@ -928,8 +913,8 @@ namespace nlohmann {
             if (j.is_null()) {
                 opt = boost::none;
             } else {
-                opt = j.get<T>(); // same as above, but with
+                opt = j.template get<T>(); // same as above, but with
-                                  // adl_serializer<T>::from_json
+                                           // adl_serializer<T>::from_json
             }
         }
     };
@@ -956,7 +941,7 @@ namespace nlohmann {
         // note: the return type is no longer 'void', and the method only takes
         // one argument
         static move_only_type from_json(const json& j) {
-            return {j.get<int>()};
+            return {j.template get<int>()};
         }
 
         // Here's the catch! You must provide a to_json method! Otherwise, you
@@ -1020,7 +1005,7 @@ struct bad_serializer
     static void to_json(const BasicJsonType& j, T& value) {
       // this calls BasicJsonType::json_serializer<T>::from_json(j, value)
       // if BasicJsonType::json_serializer == bad_serializer ... oops!
-      value = j.get<T>(); // oops!
+      value = j.template get<T>(); // oops!
     }
 };
 ```
@@ -1060,11 +1045,11 @@ assert(j == "stopped");
 
 // json string to enum
 json j3 = "running";
-assert(j3.get<TaskState>() == TS_RUNNING);
+assert(j3.template get<TaskState>() == TS_RUNNING);
 
 // undefined json value to enum (where the first map entry above is the default)
 json jPi = 3.14;
-assert(jPi.get<TaskState>() == TS_INVALID);
+assert(jPi.template get<TaskState>() == TS_INVALID);
 ```
 
 Just as in [Arbitrary Type Conversions](#arbitrary-types-conversions) above,
@@ -1074,7 +1059,7 @@ Just as in [Arbitrary Type Conversions](#arbitrary-types-conversions) above,
 
 Other Important points:
 
-- When using `get<ENUM_TYPE>()`, undefined JSON values will default to the first pair specified in your map. Select this default pair carefully.
+- When using `template get<ENUM_TYPE>()`, undefined JSON values will default to the first pair specified in your map. Select this default pair carefully.
 - If an enum or JSON value is specified more than once in your map, the first matching occurrence from the top of the map will be returned when converting to or from JSON.
 
 ### Binary formats (BSON, CBOR, MessagePack, UBJSON, and BJData)
@@ -1156,7 +1141,7 @@ The library is used in multiple projects, applications, operating systems, etc.
 
 ## Supported compilers
 
-Though it's 2026 already, the support for C++11 is still a bit sparse. Currently, the following compilers are known to work:
+Though it's 2025 already, the support for C++11 is still a bit sparse. Currently, the following compilers are known to work:
 
 - GCC 4.8 - 14.2 (and possibly later)
 - Clang 3.4 - 21.0 (and possibly later)
@@ -1335,7 +1320,7 @@ pkg-config nlohmann_json --cflags
 
 The class is licensed under the [MIT License](https://opensource.org/licenses/MIT):
 
-Copyright &copy; 2013-2026 [Niels Lohmann](https://nlohmann.me)
+Copyright &copy; 2013-2025 [Niels Lohmann](https://nlohmann.me)
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 
@@ -1866,7 +1851,7 @@ ctest --output-on-failure
 
 Note that during the `ctest` stage, several JSON test files are downloaded from an [external repository](https://github.com/nlohmann/json_test_data). If policies forbid downloading artifacts during testing, you can download the files yourself and pass the directory with the test files via `-DJSON_TestDataDirectory=path` to CMake. Then, no Internet connectivity is required. See [issue #2189](https://github.com/nlohmann/json/issues/2189) for more information.
 
-If the testdata is not found, several test suites will fail like this:
+If the test suite is not found, several test suites will fail like this:
 
 ```
 ===============================================================================
@@ -1884,8 +1869,6 @@ json/tests/src/make_test_data_available.hpp:23: FATAL ERROR: REQUIRE( utils::che
 
 In case you have downloaded the library rather than checked out the code via Git, test `cmake_fetch_content_configure` will fail. Please execute `ctest -LE git_required` to skip these tests. See [issue #2189](https://github.com/nlohmann/json/issues/2189) for more information.
 
-Some tests are requiring network to be properly execute. They are labeled as `git_required`. Please execute `ctest -LE git_required` to skip these tests. See [issue #4851](https://github.com/nlohmann/json/issues/4851) for more information.
-
 Some tests change the installed files and hence make the whole process not reproducible. Please execute `ctest -LE not_reproducible` to skip these tests. See [issue #2324](https://github.com/nlohmann/json/issues/2324) for more information. Furthermore, assertions must be switched off to ensure reproducible builds (see [discussion 4494](https://github.com/nlohmann/json/discussions/4494)).
 
 Note you need to call `cmake -LE "not_reproducible|git_required"` to exclude both labels. See [issue #2596](https://github.com/nlohmann/json/issues/2596) for more information.

cmake/ci.cmake

@@ -666,7 +666,6 @@ add_custom_target(ci_cuda_example
 add_custom_target(ci_module_cpp20
     COMMAND ${CMAKE_COMMAND}
         -DCMAKE_BUILD_TYPE=Debug -GNinja
-        -DJSON_CI=ON -DNLOHMANN_JSON_BUILD_MODULES=ON -DJSON_Install=ON
         -S${PROJECT_SOURCE_DIR}/tests/module_cpp20 -B${PROJECT_BINARY_DIR}/ci_module_cpp20
     COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/ci_module_cpp20
 )

cmake/clang_flags.cmake

@@ -6,7 +6,6 @@
 # -Wno-padded                     We do not care about padding warnings.
 # -Wno-covered-switch-default     All switches list all cases and a default case.
 # -Wno-unsafe-buffer-usage        Otherwise Doctest would not compile.
-# -Wno-missing-noreturn           We found no way to silence this warning otherwise, see PR #4871
 
 set(CLANG_CXXFLAGS
     -Werror
@@ -18,5 +17,4 @@ set(CLANG_CXXFLAGS
     -Wno-padded
     -Wno-covered-switch-default
     -Wno-unsafe-buffer-usage
-    -Wno-missing-noreturn
 )

cmake/download_test_data.cmake

@@ -1,33 +1,21 @@
 set(JSON_TEST_DATA_URL     https://github.com/nlohmann/json_test_data)
 set(JSON_TEST_DATA_VERSION 3.1.0)
 
-include(ExternalProject)
-
 # if variable is set, use test data from given directory rather than downloading them
 if(JSON_TestDataDirectory)
     message(STATUS "Using test data in ${JSON_TestDataDirectory}.")
     add_custom_target(download_test_data)
     file(WRITE ${CMAKE_BINARY_DIR}/include/test_data.hpp "#define TEST_DATA_DIRECTORY \"${JSON_TestDataDirectory}\"\n")
 else()
-    # create a header with the path to the downloaded test data
+    find_package(Git)
-    file(WRITE ${CMAKE_BINARY_DIR}/include/test_data.hpp "#define TEST_DATA_DIRECTORY \"${CMAKE_BINARY_DIR}/test_files\"\n")
-
-    # download test data from GitHub release
-    ExternalProject_Add(download_test_data_project
-        URL "${JSON_TEST_DATA_URL}/archive/refs/tags/v${JSON_TEST_DATA_VERSION}.zip"
-        SOURCE_DIR "${CMAKE_BINARY_DIR}/test_files"
-        CONFIGURE_COMMAND ""
-        BUILD_COMMAND ""
-        INSTALL_COMMAND ""
-        LOG_DOWNLOAD TRUE
-        DOWNLOAD_EXTRACT_TIMESTAMP TRUE
-        EXCLUDE_FROM_ALL TRUE
-    )
-
     # target to download test data
     add_custom_target(download_test_data
-        DEPENDS download_test_data_project
+        COMMAND test -d json_test_data || ${GIT_EXECUTABLE} clone -c advice.detachedHead=false --branch v${JSON_TEST_DATA_VERSION} ${JSON_TEST_DATA_URL}.git --quiet --depth 1
+        COMMENT "Downloading test data from ${JSON_TEST_DATA_URL} (v${JSON_TEST_DATA_VERSION})"
+        WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
     )
+    # create a header with the path to the downloaded test data
+    file(WRITE ${CMAKE_BINARY_DIR}/include/test_data.hpp "#define TEST_DATA_DIRECTORY \"${CMAKE_BINARY_DIR}/json_test_data\"\n")
 endif()
 
 # determine the operating system (for debug and support purposes)
@@ -68,14 +56,10 @@ string(REGEX REPLACE "[ ]*\n" "; " CXX_VERSION_RESULT "${CXX_VERSION_RESULT}")
 message(STATUS "Compiler: ${CXX_VERSION_RESULT}")
 
 # determine used C++ standard library (for debug and support purposes)
-if(CMAKE_CROSSCOMPILING)
-    set(LIBCPP_VERSION_OUTPUT_CACHED "could not be detected due to cross-compiling" CACHE STRING "Detected C++ standard library version")
-endif()
 if(NOT DEFINED LIBCPP_VERSION_OUTPUT_CACHED)
     try_run(RUN_RESULT_VAR COMPILE_RESULT_VAR
         "${CMAKE_BINARY_DIR}" SOURCES "${CMAKE_SOURCE_DIR}/cmake/detect_libcpp_version.cpp"
-        RUN_OUTPUT_VARIABLE LIBCPP_VERSION_OUTPUT
+        RUN_OUTPUT_VARIABLE LIBCPP_VERSION_OUTPUT COMPILE_OUTPUT_VARIABLE LIBCPP_VERSION_COMPILE_OUTPUT
-        COMPILE_OUTPUT_VARIABLE LIBCPP_VERSION_COMPILE_OUTPUT
     )
     if(NOT LIBCPP_VERSION_OUTPUT)
         set(LIBCPP_VERSION_OUTPUT "Unknown")

cmake/requirements/requirements-reuse.txt

@@ -1 +1 @@
-reuse==6.2.0
+reuse==5.0.2

docs/README.md

@@ -2,12 +2,12 @@
 
 ## Generate documentation
 
-Note on documentation: The source files contain links to the online documentation at https://json.nlohmann.me.  
+Note on documentation: The source files contain links to the online documentation at https://json.nlohmann.me. This URL
-This URL provides the most recent documentation and also applies to previous versions. Documentation for deprecated
+contains the most recent documentation and should also be applicable to previous versions; documentation for deprecated
-functions is not removed; instead, it is marked as deprecated.
+functions is not removed, but marked deprecated.
 
-If you want to view the documentation for a specific tag or commit hash, you can generate it locally as follows (example
+If you want to see the documentation for a specific tag or commit hash, you can generate it as follows (here for tag
-using tag `v3.10.2`):
+`v3.10.2`):
 
 ```shell
 git clone https://github.com/nlohmann/json.git
@@ -16,8 +16,5 @@ git checkout v3.10.2
 make install_venv serve -C docs/mkdocs
 ```
 
-Open <http://127.0.0.1:8000/> in your browser. Replace any URL in the source code that points to
+Open URL <http://127.0.0.1:8000/> in your browser. Replace from any URL from the source code `https://json.nlohmann.me`
-`https://json.nlohmann.me` with `http://127.0.0.1:8000` to view the documentation for the selected tag or commit hash.
+with `http://127.0.0.1:8000` to see the documentation for your tag or commit hash.
-
-
-

docs/mkdocs/docs/api/adl_serializer/from_json.md

@@ -37,7 +37,7 @@ Copy of the JSON value, converted to `ValueType`
 ??? example "Example: (1) Default-constructible type"
 
     The example below shows how a `from_json` function can be implemented for a user-defined type. This function is
-    called by the `adl_serializer` when `get<ns::person>()` is called.
+    called by the `adl_serializer` when `template get<ns::person>()` is called.
         
     ```cpp
     --8<-- "examples/from_json__default_constructible.cpp"

docs/mkdocs/docs/api/basic_json/sax_parse.md

@@ -51,10 +51,10 @@ The SAX event lister must follow the interface of [`json_sax`](../json_sax/index
 ## Parameters
 
 `i` (in)
-:   Input to parse from
+:   Input to parse from.
 
 `sax` (in)
-:   SAX event listener (must not be null)
+:   SAX event listener
 
 `format` (in)
 :    the format to parse (JSON, CBOR, MessagePack, or UBJSON) (optional, `input_format_t::json` by default), see
@@ -83,17 +83,6 @@ return value of the last processed SAX event
 
 ## Exception safety
 
-Strong guarantee: if an exception is thrown, there are no changes in the JSON value.
-
-## Exceptions
-
-- Throws [`parse_error.101`](../../home/exceptions.md#jsonexceptionparse_error101) in case of an unexpected token, or
-  empty input like a null `FILE*` or `char*` pointer.
-- Throws [`parse_error.102`](../../home/exceptions.md#jsonexceptionparse_error102) if `to_unicode` fails or surrogate
-  error.
-- Throws [`parse_error.103`](../../home/exceptions.md#jsonexceptionparse_error103) if `to_unicode` fails.
-- Throws [`other_error.502`](../../home/exceptions.md#jsonexceptionother_error502) if `sax` is a null pointer.
-
 ## Complexity
 
 Linear in the length of the input. The parser is a predictive LL(1) parser. The complexity can be higher if the SAX
@@ -125,7 +114,6 @@ A UTF-8 byte order mark is silently ignored.
 - Added in version 3.2.0.
 - Ignoring comments via `ignore_comments` added in version 3.9.0.
 - Added `ignore_trailing_commas` in version 3.12.1.
-- Added `json.exception.other_error.502` exception in version 3.12.1.
 
 !!! warning "Deprecation"
 

docs/mkdocs/docs/api/macros/json_disable_enum_serialization.md

@@ -53,7 +53,7 @@ The default value is `0`.
         const json j = Choice::first; 
 
         // normally invokes from_json parse function but with JSON_DISABLE_ENUM_SERIALIZATION defined, it does not
-        Choice ch = j.get<Choice>();
+        Choice ch = j.template get<Choice>();
     }
     ```
 
@@ -86,7 +86,7 @@ The default value is `0`.
         const json j = Choice::first; 
 
         // uses user-defined from_json function defined by macro
-        Choice ch = j.get<Choice>();
+        Choice ch = j.template get<Choice>();
     }
     ```
 
@@ -109,7 +109,7 @@ The default value is `0`.
 
     void from_json(const json& j, Choice& ch)
     {
-        auto value = j.get<std::string>();
+        auto value = j.template get<std::string>();
         if (value == "first")
         {
             ch = Choice::first;
@@ -122,7 +122,7 @@ The default value is `0`.
 
     void to_json(json& j, const Choice& ch)
     {
-        auto value = j.get<std::string>();
+        auto value = j.template get<std::string>();
         if (value == "first")
         {
             ch = Choice::first;
@@ -139,7 +139,7 @@ The default value is `0`.
         const json j = Choice::first; 
 
         // uses user-defined from_json function
-        Choice ch = j.get<Choice>();
+        Choice ch = j.template get<Choice>();
     }
     ```
 

docs/mkdocs/docs/api/macros/json_use_implicit_conversions.md

@@ -46,7 +46,7 @@ By default, implicit conversions are enabled.
 
     ```cpp
     json j = "Hello, world!";
-    auto s = j.get<std::string>();
+    auto s = j.template get<std::string>();
     ```
 
 ## See also

docs/mkdocs/docs/api/macros/nlohmann_json_serialize_enum.md

@@ -37,7 +37,7 @@ inline void from_json(const BasicJsonType& j, type& e);
 
 !!! important "Important notes"
 
-    - When using [`get<ENUM_TYPE>()`](../basic_json/get.md), undefined JSON values will default to the first specified
+    - When using [`template get<ENUM_TYPE>()`](../basic_json/get.md), undefined JSON values will default to the first specified
       conversion. Select this default pair carefully. See example 1 below.
     - If an enum or JSON value is specified in multiple conversions, the first matching conversion from the top of the
       list will be returned when converting to or from JSON. See example 2 below.

docs/mkdocs/docs/api/operator_literal_json.md

@@ -2,7 +2,6 @@
 
 ```cpp
 json operator ""_json(const char* s, std::size_t n);
-json operator ""_json(const char8_t* s, std::size_t n);  // since C++20
 ```
 
 This operator implements a user-defined string literal for JSON objects. It can be used by adding `#!cpp _json` to a
@@ -60,4 +59,3 @@ Linear.
 
 - Added in version 1.0.0.
 - Moved to namespace `nlohmann::literals::json_literals` in 3.11.0.
-- Added `char8_t*` overload in 3.12.1.

docs/mkdocs/docs/api/operator_literal_json_pointer.md

@@ -2,7 +2,6 @@
 
 ```cpp
 json_pointer operator ""_json_pointer(const char* s, std::size_t n);
-json_pointer operator ""_json_pointer(const char8_t* s, std::size_t n);  // since C++20
 ```
 
 This operator implements a user-defined string literal for JSON Pointers. It can be used by adding `#!cpp _json_pointer`
@@ -63,4 +62,3 @@ Linear.
 
 - Added in version 2.0.0.
 - Moved to namespace `nlohmann::literals::json_literals` in 3.11.0.
-- Added `char8_t*` overload in 3.12.1.

docs/mkdocs/docs/community/quality_assurance.md

@@ -15,83 +15,81 @@ violations will result in a failed build.
 
     ??? abstract "Compilers used in continuous integration"
       
-        | Compiler                                     | Architecture | Operating System                  | CI        |
+        | Compiler                                     | Architecture | Operating System         | CI        |
-        |----------------------------------------------|--------------|-----------------------------------|-----------|
+        |----------------------------------------------|--------------|--------------------------|-----------|
-        | AppleClang 15.0.0.15000040; Xcode 15.0.1     | x86_64       | macOS 13.7.2 (Ventura)            | GitHub    |
+        | AppleClang 14.0.0.14000029; Xcode 14.1       | x86_64       | macOS 13.7.2 (Ventura)   | GitHub    |
-        | AppleClang 15.0.0.15000100; Xcode 15.1       | x86_64       | macOS 13.7.2 (Ventura)            | GitHub    |
+        | AppleClang 14.0.0.14000029; Xcode 14.2       | x86_64       | macOS 13.7.2 (Ventura)   | GitHub    |
-        | AppleClang 15.0.0.15000100; Xcode 15.2       | x86_64       | macOS 13.7.2 (Ventura)            | GitHub    |
+        | AppleClang 14.0.3.14030022; Xcode 14.3.1     | x86_64       | macOS 13.7.2 (Ventura)   | GitHub    |
-        | AppleClang 15.0.0.15000309; Xcode 15.3       | arm64        | macOS 14.7.2 (Sonoma)             | GitHub    |
+        | AppleClang 15.0.0.15000040; Xcode 15.0.1     | x86_64       | macOS 13.7.2 (Ventura)   | GitHub    |
-        | AppleClang 15.0.0.15000309; Xcode 15.4       | arm64        | macOS 14.7.2 (Sonoma)             | GitHub    |
+        | AppleClang 15.0.0.15000100; Xcode 15.1       | x86_64       | macOS 13.7.2 (Ventura)   | GitHub    |
-        | AppleClang 16.0.0.16000026; Xcode 16         | arm64        | macOS 15.2 (Sequoia)              | GitHub    |
+        | AppleClang 15.0.0.15000100; Xcode 15.2       | x86_64       | macOS 13.7.2 (Ventura)   | GitHub    |
-        | AppleClang 16.0.0.16000026; Xcode 16.1       | arm64        | macOS 15.2 (Sequoia)              | GitHub    |
+        | AppleClang 15.0.0.15000309; Xcode 15.3       | arm64        | macOS 14.7.2 (Sonoma)    | GitHub    |
-        | AppleClang 16.0.0.16000026; Xcode 16.2       | arm64        | macOS 15.2 (Sequoia)              | GitHub    |
+        | AppleClang 15.0.0.15000309; Xcode 15.4       | arm64        | macOS 14.7.2 (Sonoma)    | GitHub    |
-        | AppleClang 17.0.0.17000013; Xcode 16.3       | arm64        | macOS 15.5 (Sequoia)              | GitHub    |
+        | AppleClang 16.0.0.16000026; Xcode 16         | arm64        | macOS 15.2 (Sequoia)     | GitHub    |
-        | AppleClang 17.0.0.17000013; Xcode 16.4       | arm64        | macOS 15.5 (Sequoia)              | GitHub    |
+        | AppleClang 16.0.0.16000026; Xcode 16.1       | arm64        | macOS 15.2 (Sequoia)     | GitHub    |
-        | AppleClang 17.0.0.17000319; Xcode 26.0.1     | arm64        | macOS 15.5 (Sequoia)              | GitHub    |
+        | AppleClang 16.0.0.16000026; Xcode 16.2       | arm64        | macOS 15.2 (Sequoia)     | GitHub    |
-        | Clang 3.5.2                                  | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | Clang 3.5.2                                  | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 3.6.2                                  | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | Clang 3.6.2                                  | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 3.7.1                                  | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | Clang 3.7.1                                  | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 3.8.1                                  | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | Clang 3.8.1                                  | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 3.9.1                                  | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | Clang 3.9.1                                  | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 4.0.1                                  | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | Clang 4.0.1                                  | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 5.0.2                                  | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | Clang 5.0.2                                  | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 6.0.1                                  | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | Clang 6.0.1                                  | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 7.1.0                                  | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | Clang 7.1.0                                  | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 8.0.1                                  | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | Clang 8.0.1                                  | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 9.0.1                                  | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | Clang 9.0.1                                  | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 10.0.1                                 | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | Clang 10.0.1                                 | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 11.0.1 with GNU-like command-line      | x86_64       | Windows Server 2022 (Build 20348) | GitHub    |
+        | Clang 11.0.0 with GNU-like command-line      | x86_64       | Windows 10 (Build 17763) | GitHub    |
-        | Clang 11.1.0                                 | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | Clang 11.1.0                                 | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 12.0.1 with GNU-like command-line      | x86_64       | Windows Server 2022 (Build 20348) | GitHub    |
+        | Clang 12.0.0 with GNU-like command-line      | x86_64       | Windows 10 (Build 17763) | GitHub    |
-        | Clang 12.0.1                                 | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | Clang 12.0.0 with MSVC-like command-line     | x86_64       | Windows 10 (Build 17763) | GitHub    |
-        | Clang 13.0.1 with GNU-like command-line      | x86_64       | Windows Server 2022 (Build 20348) | GitHub    |
+        | Clang 12.0.1                                 | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 13.0.1                                 | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | Clang 13.0.0 with GNU-like command-line      | x86_64       | Windows 10 (Build 17763) | GitHub    |
-        | Clang 14.0.6                                 | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | Clang 13.0.1                                 | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 14.0.6 with GNU-like command-line      | x86_64       | Windows Server 2022 (Build 20348) | GitHub    |
+        | Clang 14.0.0 with GNU-like command-line      | x86_64       | Windows 10 (Build 17763) | GitHub    |
-        | Clang 15.0.7                                 | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | Clang 14.0.6                                 | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 15.0.7 with GNU-like command-line      | x86_64       | Windows Server 2022 (Build 20348) | GitHub    |
+        | Clang 15.0.0 with GNU-like command-line      | x86_64       | Windows 10 (Build 17763) | GitHub    |
-        | Clang 16.0.6                                 | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | Clang 15.0.7                                 | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 16.0.6 with GNU-like command-line      | x86_64       | Windows Server 2022 (Build 20348) | GitHub    |
+        | Clang 16.0.6                                 | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 17.0.6                                 | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | Clang 17.0.6                                 | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 18.1.8                                 | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | Clang 18.1.8                                 | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 18.1.8 with GNU-like command-line      | x86_64       | Windows Server 2022 (Build 20348) | GitHub    |
+        | Clang 19.1.7                                 | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 19.1.5 with MSVC-like command-line     | x86_64       | Windows Server 2022 (Build 20348) | GitHub    |
+        | Clang 20.1.1                                 | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 19.1.7                                 | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | Clang 21.0.0                                 | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 19.1.7 with GNU-like command-line      | x86_64       | Windows Server 2022 (Build 20348) | GitHub    |
+        | Emscripten 4.0.6                             | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 20.1.1                                 | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | GNU 4.8.5                                    | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 20.1.8 with GNU-like command-line      | x86_64       | Windows Server 2022 (Build 20348) | GitHub    |
+        | GNU 4.9.3                                    | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Clang 21.0.0                                 | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | GNU 5.5.0                                    | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | Emscripten 4.0.6                             | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | GNU 6.4.0                                    | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | GNU 4.8.5                                    | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | GNU 7.5.0                                    | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | GNU 4.9.3                                    | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | GNU 8.5.0                                    | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | GNU 5.5.0                                    | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | GNU 9.3.0                                    | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | GNU 6.4.0                                    | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | GNU 9.4.0                                    | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | GNU 7.5.0                                    | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | GNU 9.5.0                                    | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | GNU 8.5.0                                    | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | GNU 10.5.0                                   | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | GNU 9.3.0                                    | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | GNU 11.4.0                                   | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | GNU 9.4.0                                    | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | GNU 11.5.0                                   | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | GNU 9.5.0                                    | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | GNU 12.2.0 (MinGW-W64 i686-ucrt-posix-dwarf) | x86_64       | Windows 10 (Build 17763) | GitHub    |
-        | GNU 10.5.0                                   | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | GNU 12.2.0 (MinGW-W64 x86_64-ucrt-posix-seh) | x86_64       | Windows 10 (Build 17763) | GitHub    |
-        | GNU 11.4.0                                   | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | GNU 12.4.0                                   | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | GNU 11.5.0                                   | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | GNU 13.3.0                                   | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | GNU 12.2.0 (MinGW-W64 i686-ucrt-posix-dwarf) | x86_64       | Windows Server 2022 (Build 20348) | GitHub    |
+        | GNU 14.2.0                                   | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | GNU 12.2.0 (MinGW-W64 x86_64-ucrt-posix-seh) | x86_64       | Windows Server 2022 (Build 20348) | GitHub    |
+        | GNU 14.2.0                                   | arm64        | Linux 6.1.100            | Cirrus CI |
-        | GNU 12.4.0                                   | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | GNU 15.1.0                                   | x86_64       | Ubuntu 22.04.1 LTS       | GitHub    |
-        | GNU 13.3.0                                   | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | icpc (ICC) 2021.5.0 20211109                 | x86_64       | Ubuntu 20.04.3 LTS       | GitHub    |
-        | GNU 14.2.0                                   | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | MSVC 19.0.24241.7                            | x86          | Windows 8.1              | AppVeyor  |
-        | GNU 14.2.0                                   | arm64        | Linux 6.1.100                     | Cirrus CI |
+        | MSVC 19.16.27035.0                           | x86          | Windows-10 (Build 14393) | AppVeyor  |
-        | GNU 15.1.0                                   | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | MSVC 19.29.30157.0                           | x86          | Windows 10 (Build 17763) | GitHub    |
-        | icpc (ICC) 2021.5.0 20211109                 | x86_64       | Ubuntu 20.04.3 LTS                | GitHub    |
+        | MSVC 19.29.30157.0                           | x86_64       | Windows 10 (Build 17763) | GitHub    |
-        | MSVC 19.0.24241.7                            | x86          | Windows 8.1                       | AppVeyor  |
+        | MSVC 19.29.30157.0                           | x86          | Windows-10 (Build 17763) | AppVeyor  |
-        | MSVC 19.16.27035.0                           | x86          | Windows-10 (Build 14393)          | AppVeyor  |
+        | MSVC 19.42.34435.0                           | x86          | Windows 10 (Build 20348) | GitHub    |
-        | MSVC 19.29.30157.0                           | x86          | Windows-10 (Build 17763)          | AppVeyor  |
+        | MSVC 19.42.34435.0                           | x86_64       | Windows 10 (Build 20348) | GitHub    |
-        | MSVC 19.44.35214.0                           | x86          | Windows Server 2022 (Build 20348) | GitHub    |
-        | MSVC 19.44.35214.0                           | x86_64       | Windows Server 2022 (Build 20348) | GitHub    |
 
 - [x] The library is compiled with all C++ language revisions (C++11, C++14, C++17, C++20, C++23, and C++26) to detect
   and fix language deprecations early.
 - [x] The library is checked for compiler warnings:
-  - On Clang, `-Weverything` is used with 8 exceptions.
+  - On Clang, `-Weverything` is used with 7 exceptions.
 
     ??? abstract "Clang warnings"
 

docs/mkdocs/docs/examples/diagnostic_positions_exception.cpp

@@ -5,7 +5,7 @@
 
 using json = nlohmann::json;
 
-/* Demonstration of type error exception with diagnostic positions support enabled */
+/* Demonstration of type error exception with diagnostic postions support enabled */
 int main()
 {
     //Invalid json string - housenumber type must be int instead of string

docs/mkdocs/docs/examples/diagnostics_extended_positions.cpp

@@ -6,7 +6,7 @@
 
 using json = nlohmann::json;
 
-/* Demonstration of type error exception with diagnostic positions support enabled */
+/* Demonstration of type error exception with diagnostic postions support enabled */
 int main()
 {
     //Invalid json string - housenumber type must be int instead of string

docs/mkdocs/docs/examples/from_json__default_constructible.cpp

@@ -31,7 +31,7 @@ int main()
     j["address"] = "744 Evergreen Terrace";
     j["age"] = 60;
 
-    auto p = j.get<ns::person>();
+    auto p = j.template get<ns::person>();
 
     std::cout << p.name << " (" << p.age << ") lives in " << p.address << std::endl;
 }

docs/mkdocs/docs/examples/from_json__non_default_constructible.cpp

@@ -47,7 +47,7 @@ int main()
     j["address"] = "744 Evergreen Terrace";
     j["age"] = 60;
 
-    auto p = j.get<ns::person>();
+    auto p = j.template get<ns::person>();
 
     std::cout << p.name << " (" << p.age << ") lives in " << p.address << std::endl;
 }

docs/mkdocs/docs/examples/get__PointerType.cpp

@@ -9,11 +9,11 @@ int main()
     json value = 17;
 
     // explicitly getting pointers
-    auto p1 = value.get<const json::number_integer_t*>();
+    auto p1 = value.template get<const json::number_integer_t*>();
-    auto p2 = value.get<json::number_integer_t*>();
+    auto p2 = value.template get<json::number_integer_t*>();
-    auto p3 = value.get<json::number_integer_t* const>();
+    auto p3 = value.template get<json::number_integer_t* const>();
-    auto p4 = value.get<const json::number_integer_t* const>();
+    auto p4 = value.template get<const json::number_integer_t* const>();
-    auto p5 = value.get<json::number_float_t*>();
+    auto p5 = value.template get<json::number_float_t*>();
 
     // print the pointees
     std::cout << *p1 << ' ' << *p2 << ' ' << *p3 << ' ' << *p4 << '\n';

docs/mkdocs/docs/examples/get__ValueType_const.cpp

@@ -22,14 +22,14 @@ int main()
     };
 
     // use explicit conversions
-    auto v1 = json_types["boolean"].get<bool>();
+    auto v1 = json_types["boolean"].template get<bool>();
-    auto v2 = json_types["number"]["integer"].get<int>();
+    auto v2 = json_types["number"]["integer"].template get<int>();
-    auto v3 = json_types["number"]["integer"].get<short>();
+    auto v3 = json_types["number"]["integer"].template get<short>();
-    auto v4 = json_types["number"]["floating-point"].get<float>();
+    auto v4 = json_types["number"]["floating-point"].template get<float>();
-    auto v5 = json_types["number"]["floating-point"].get<int>();
+    auto v5 = json_types["number"]["floating-point"].template get<int>();
-    auto v6 = json_types["string"].get<std::string>();
+    auto v6 = json_types["string"].template get<std::string>();
-    auto v7 = json_types["array"].get<std::vector<short>>();
+    auto v7 = json_types["array"].template get<std::vector<short>>();
-    auto v8 = json_types.get<std::unordered_map<std::string, json>>();
+    auto v8 = json_types.template get<std::unordered_map<std::string, json>>();
 
     // print the conversion results
     std::cout << v1 << '\n';

docs/mkdocs/docs/examples/meta.output

@@ -4,7 +4,7 @@
         "family": "gcc",
         "version": "12.4.0"
     },
-    "copyright": "(C) 2013-2026 Niels Lohmann",
+    "copyright": "(C) 2013-2025 Niels Lohmann",
     "name": "JSON for Modern C++",
     "platform": "apple",
     "url": "https://github.com/nlohmann/json",

docs/mkdocs/docs/examples/nlohmann_define_type_intrusive_explicit.cpp

@@ -47,13 +47,13 @@ int main()
 
     // deserialization: json -> person
     json j2 = R"({"address": "742 Evergreen Terrace", "age": 40, "name": "Homer Simpson"})"_json;
-    auto p2 = j2.get<ns::person>();
+    auto p2 = j2.template get<ns::person>();
 
     // incomplete deserialization:
     json j3 = R"({"address": "742 Evergreen Terrace", "name": "Maggie Simpson"})"_json;
     try
     {
-        auto p3 = j3.get<ns::person>();
+        auto p3 = j3.template get<ns::person>();
     }
     catch (const json::exception& e)
     {

docs/mkdocs/docs/examples/nlohmann_define_type_intrusive_macro.cpp

@@ -33,13 +33,13 @@ int main()
 
     // deserialization: json -> person
     json j2 = R"({"address": "742 Evergreen Terrace", "age": 40, "name": "Homer Simpson"})"_json;
-    auto p2 = j2.get<ns::person>();
+    auto p2 = j2.template get<ns::person>();
 
     // incomplete deserialization:
     json j3 = R"({"address": "742 Evergreen Terrace", "name": "Maggie Simpson"})"_json;
     try
     {
-        auto p3 = j3.get<ns::person>();
+        auto p3 = j3.template get<ns::person>();
     }
     catch (const json::exception& e)
     {

docs/mkdocs/docs/examples/nlohmann_define_type_intrusive_with_default_explicit.cpp

@@ -48,10 +48,10 @@ int main()
 
     // deserialization: json -> person
     json j2 = R"({"address": "742 Evergreen Terrace", "age": 40, "name": "Homer Simpson"})"_json;
-    auto p2 = j2.get<ns::person>();
+    auto p2 = j2.template get<ns::person>();
 
     // incomplete deserialization:
     json j3 = R"({"address": "742 Evergreen Terrace", "name": "Maggie Simpson"})"_json;
-    auto p3 = j3.get<ns::person>();
+    auto p3 = j3.template get<ns::person>();
     std::cout << "roundtrip: " << json(p3) << std::endl;
 }

docs/mkdocs/docs/examples/nlohmann_define_type_intrusive_with_default_macro.cpp

@@ -33,10 +33,10 @@ int main()
 
     // deserialization: json -> person
     json j2 = R"({"address": "742 Evergreen Terrace", "age": 40, "name": "Homer Simpson"})"_json;
-    auto p2 = j2.get<ns::person>();
+    auto p2 = j2.template get<ns::person>();
 
     // incomplete deserialization:
     json j3 = R"({"address": "742 Evergreen Terrace", "name": "Maggie Simpson"})"_json;
-    auto p3 = j3.get<ns::person>();
+    auto p3 = j3.template get<ns::person>();
     std::cout << "roundtrip: " << json(p3) << std::endl;
 }

docs/mkdocs/docs/examples/nlohmann_define_type_non_intrusive_explicit.cpp

@@ -40,13 +40,13 @@ int main()
 
     // deserialization: json -> person
     json j2 = R"({"address": "742 Evergreen Terrace", "age": 40, "name": "Homer Simpson"})"_json;
-    auto p2 = j2.get<ns::person>();
+    auto p2 = j2.template get<ns::person>();
 
     // incomplete deserialization:
     json j3 = R"({"address": "742 Evergreen Terrace", "name": "Maggie Simpson"})"_json;
     try
     {
-        auto p3 = j3.get<ns::person>();
+        auto p3 = j3.template get<ns::person>();
     }
     catch (const json::exception& e)
     {

docs/mkdocs/docs/examples/nlohmann_define_type_non_intrusive_macro.cpp

@@ -26,13 +26,13 @@ int main()
 
     // deserialization: json -> person
     json j2 = R"({"address": "742 Evergreen Terrace", "age": 40, "name": "Homer Simpson"})"_json;
-    auto p2 = j2.get<ns::person>();
+    auto p2 = j2.template get<ns::person>();
 
     // incomplete deserialization:
     json j3 = R"({"address": "742 Evergreen Terrace", "name": "Maggie Simpson"})"_json;
     try
     {
-        auto p3 = j3.get<ns::person>();
+        auto p3 = j3.template get<ns::person>();
     }
     catch (const json::exception& e)
     {

docs/mkdocs/docs/examples/nlohmann_define_type_non_intrusive_with_default_explicit.cpp

@@ -46,10 +46,10 @@ int main()
 
     // deserialization: json -> person
     json j2 = R"({"address": "742 Evergreen Terrace", "age": 40, "name": "Homer Simpson"})"_json;
-    auto p2 = j2.get<ns::person>();
+    auto p2 = j2.template get<ns::person>();
 
     // incomplete deserialization:
     json j3 = R"({"address": "742 Evergreen Terrace", "name": "Maggie Simpson"})"_json;
-    auto p3 = j3.get<ns::person>();
+    auto p3 = j3.template get<ns::person>();
     std::cout << "roundtrip: " << json(p3) << std::endl;
 }

docs/mkdocs/docs/examples/nlohmann_define_type_non_intrusive_with_default_macro.cpp

@@ -31,10 +31,10 @@ int main()
 
     // deserialization: json -> person
     json j2 = R"({"address": "742 Evergreen Terrace", "age": 40, "name": "Homer Simpson"})"_json;
-    auto p2 = j2.get<ns::person>();
+    auto p2 = j2.template get<ns::person>();
 
     // incomplete deserialization:
     json j3 = R"({"address": "742 Evergreen Terrace", "name": "Maggie Simpson"})"_json;
-    auto p3 = j3.get<ns::person>();
+    auto p3 = j3.template get<ns::person>();
     std::cout << "roundtrip: " << json(p3) << std::endl;
 }

docs/mkdocs/docs/examples/nlohmann_json_serialize_enum.cpp

@@ -44,16 +44,16 @@ int main()
     // deserialization
     json j_running = "running";
     json j_blue = "blue";
-    auto running = j_running.get<ns::TaskState>();
+    auto running = j_running.template get<ns::TaskState>();
-    auto blue = j_blue.get<ns::Color>();
+    auto blue = j_blue.template get<ns::Color>();
     std::cout << j_running << " -> " << running
               << ", " << j_blue << " -> " << static_cast<int>(blue) << std::endl;
 
     // deserializing undefined JSON value to enum
     // (where the first map entry above is the default)
     json j_pi = 3.14;
-    auto invalid = j_pi.get<ns::TaskState>();
+    auto invalid = j_pi.template get<ns::TaskState>();
-    auto unknown = j_pi.get<ns::Color>();
+    auto unknown = j_pi.template get<ns::Color>();
     std::cout << j_pi << " -> " << invalid << ", "
               << j_pi << " -> " << static_cast<int>(unknown) << std::endl;
 }

docs/mkdocs/docs/examples/nlohmann_json_serialize_enum_2.cpp

@@ -26,8 +26,8 @@ int main()
 
     // deserialization
     json j_rot = "rot";
-    auto rot = j_rot.get<ns::Color>();
+    auto rot = j_rot.template get<ns::Color>();
-    auto red = j_red.get<ns::Color>();
+    auto red = j_red.template get<ns::Color>();
     std::cout << j_rot << " -> " << static_cast<int>(rot) << std::endl;
     std::cout << j_red << " -> " << static_cast<int>(red) << std::endl;
 }

docs/mkdocs/docs/examples/operator_ltlt__json_pointer.cpp

@@ -5,7 +5,7 @@ using json = nlohmann::json;
 
 int main()
 {
-    // create JSON pointer
+    // create JSON poiner
     json::json_pointer ptr("/foo/bar/baz");
 
     // write string representation to stream

docs/mkdocs/docs/examples/value__return_type.cpp

@@ -10,5 +10,5 @@ int main()
     std::cout << "operator[]:                " << j["uint64"] << '\n'
               << "default value (int):       " << j.value("uint64", 0) << '\n'
               << "default value (uint64_t):  " << j.value("uint64", std::uint64_t(0)) << '\n'
-              << "explicit return value type: " << j.value<std::uint64_t>("uint64", 0) << '\n';
+              << "explict return value type: " << j.value<std::uint64_t>("uint64", 0) << '\n';
 }

docs/mkdocs/docs/examples/value__return_type.output

@@ -1,4 +1,4 @@
 operator[]:                18446744073709551615
 default value (int):       -1
 default value (uint64_t):  18446744073709551615
-explicit return value type: 18446744073709551615
+explict return value type: 18446744073709551615

docs/mkdocs/docs/features/arbitrary_types.md

@@ -24,9 +24,9 @@ j["age"] = p.age;
 
 // convert from JSON: copy each value from the JSON object
 ns::person p {
-    j["name"].get<std::string>(),
+    j["name"].template get<std::string>(),
-    j["address"].get<std::string>(),
+    j["address"].template get<std::string>(),
-    j["age"].get<int>()
+    j["age"].template get<int>()
 };
 ```
 
@@ -43,7 +43,7 @@ std::cout << j << std::endl;
 // {"address":"744 Evergreen Terrace","age":60,"name":"Ned Flanders"}
 
 // conversion: json -> person
-auto p2 = j.get<ns::person>();
+auto p2 = j.template get<ns::person>();
 
 // that's it
 assert(p == p2);
@@ -70,13 +70,13 @@ namespace ns {
 ```
 
 That's all! When calling the `json` constructor with your type, your custom `to_json` method will be automatically called.
-Likewise, when calling `get<your_type>()` or `get_to(your_type&)`, the `from_json` method will be called.
+Likewise, when calling `template get<your_type>()` or `get_to(your_type&)`, the `from_json` method will be called.
 
 Some important things:
 
 * Those methods **MUST** be in your type's namespace (which can be the global namespace), or the library will not be able to locate them (in this example, they are in namespace `ns`, where `person` is defined).
 * Those methods **MUST** be available (e.g., proper headers must be included) everywhere you use these conversions. Look at [#1108](https://github.com/nlohmann/json/issues/1108) for errors that may occur otherwise.
-* When using `get<your_type>()`, `your_type` **MUST** be [DefaultConstructible](https://en.cppreference.com/w/cpp/named_req/DefaultConstructible). (There is a way to bypass this requirement described later.)
+* When using `template get<your_type>()`, `your_type` **MUST** be [DefaultConstructible](https://en.cppreference.com/w/cpp/named_req/DefaultConstructible). (There is a way to bypass this requirement described later.)
 * In function `from_json`, use function [`at()`](../api/basic_json/at.md) to access the object values rather than `operator[]`. In case a key does not exist, `at` throws an exception that you can handle, whereas `operator[]` exhibits undefined behavior.
 * You do not need to add serializers or deserializers for STL types like `std::vector`: the library already implements these.
 
@@ -191,7 +191,7 @@ struct adl_serializer<boost::optional<T>> {
         if (j.is_null()) {
             opt = boost::none;
         } else {
-            opt = j.get<T>(); // same as above, but with
+            opt = j.template get<T>(); // same as above, but with
                               // adl_serializer<T>::from_json
         }
     }
@@ -224,7 +224,7 @@ namespace nlohmann {
         // note: the return type is no longer 'void', and the method only takes
         // one argument
         static move_only_type from_json(const json& j) {
-            return {j.get<int>()};
+            return {j.template get<int>()};
         }
 
         // Here's the catch! You must provide a to_json method! Otherwise, you
@@ -288,7 +288,7 @@ struct bad_serializer
     static void from_json(const BasicJsonType& j, T& value) {
       // this calls BasicJsonType::json_serializer<T>::from_json(j, value);
       // if BasicJsonType::json_serializer == bad_serializer ... oops!
-      value = j.template get<T>(); // oops!
+      value = j.template template get<T>(); // oops!
     }
 };
 ```

docs/mkdocs/docs/features/binary_formats/bjdata.md

@@ -115,7 +115,7 @@ The library uses the following mapping from JSON values types to BJData types ac
     }
     ```
 
-    Likewise, when a JSON object in the above form is serialized using
+    Likewise, when a JSON object in the above form is serialzed using
     [`to_bjdata`](../../api/basic_json/to_bjdata.md), it is automatically converted into a compact BJData ND-array. The
     only exception is, that when the 1-dimensional vector stored in `"_ArraySize_"` contains a single integer or two
     integers with one being 1, a regular 1-D optimized array is generated.

docs/mkdocs/docs/features/enum_conversion.md

@@ -36,11 +36,11 @@ assert(j == "stopped");
 
 // json string to enum
 json j3 = "running";
-assert(j3.get<TaskState>() == TS_RUNNING);
+assert(j3.template get<TaskState>() == TS_RUNNING);
 
 // undefined json value to enum (where the first map entry above is the default)
 json jPi = 3.14;
-assert(jPi.get<TaskState>() == TS_INVALID );
+assert(jPi.template get<TaskState>() == TS_INVALID );
 ```
 
 ## Notes
@@ -54,7 +54,7 @@ Just as in [Arbitrary Type Conversions](arbitrary_types.md) above,
 
 Other Important points:
 
-- When using `get<ENUM_TYPE>()`, undefined JSON values will default to the first pair specified in your map. Select this
+- When using `template get<ENUM_TYPE>()`, undefined JSON values will default to the first pair specified in your map. Select this
   default pair carefully.
 - If an enum or JSON value is specified more than once in your map, the first matching occurrence from the top of the
   map will be returned when converting to or from JSON.

docs/mkdocs/docs/features/modules.md

@@ -1,34 +0,0 @@
-# Modules
-
-This library has experimental support for C++ modules, introduced in C++20. The library can be imported by writing `import nlohmann.json;` instead of `#include <nlohmann/json.hpp>`. 
-
-Please be aware that the module is experimental and a full test is outstanding, and the exported symbols are subject to change.
-
-## Requirements
-The `nlohmann.json` module requires that the build system is configured to build and resolve modules when imported. Obviously, as modules were introduced in C++20, this feature can only be used in C++20 and subsequent versions.
-
-To enable building the `nlohmann.json` module (which is not done by default), the macro `NLOHMANN_JSON_BUILD_MODULES` must be passed to the build system.
-
-## Example
-When using modules rather than headers, the previous example for creating a `json` object through a JSON file, would instead be:
-```cpp
-import std;
-import nlohmann.json;
-
-using json = nlohmann::json;
-
-// ...
-
-std::ifstream f("example.json");
-json data = json::parse(f);
-```
-
-## Modules do not export macros
-It should be noted that as modules do not export macros, the `nlohmann.json` module will not export any macros, but rather only the following symbols:
-
-- `nlohmann::adl_serializer`
-- `nlohmann::basic_json`
-- `nlohmann::json`
-- `nlohmann::json_pointer`
-- `nlohmann::ordered_map`
-- `nlohmann::ordered_json`

docs/mkdocs/docs/features/namespace.md

@@ -10,7 +10,7 @@ types.
 The complete default namespace name is derived as follows:
 
 - The root namespace is always `nlohmann`.
-- The inline namespace starts with `json_abi` and is followed by several optional ABI tags according to the value of
+- The inline namespace starts with `json_abi` and is followed by serveral optional ABI tags according to the value of
   these ABI-affecting macros, in order:
     - [`JSON_DIAGNOSTICS`](../api/macros/json_diagnostics.md) defined non-zero appends `_diag`.
     - [`JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON`](../api/macros/json_use_legacy_discarded_value_comparison.md)

docs/mkdocs/docs/features/types/number_handling.md

@@ -235,9 +235,9 @@ integers, and between integers and floating-point values to integers. This behav
 !!! warning "Unconditional number conversions"
 
     ```cpp hl_lines="3"
-    double d = 42.3;                          // non-integer double value 42.3
+    double d = 42.3;                                   // non-integer double value 42.3
-    json jd = d;                              // stores double value 42.3
+    json jd = d;                                       // stores double value 42.3
-    std::int64_t i = jd.get<std::int64_t>();  // now i==42; no warning or error is produced
+    std::int64_t i = jd.template get<std::int64_t>();  // now i==42; no warning or error is produced
     ```
 
     Note the last line with throw a [`json.exception.type_error.302`](../../home/exceptions.md#jsonexceptiontype_error302)
@@ -259,7 +259,7 @@ The rationale is twofold:
     if (jd.is_number_integer())
     {
         // if so, do the conversion and use i
-        std::int64_t i = jd.get<std::int64_t>();
+        std::int64_t i = jd.template get<std::int64_t>();
         // ...
     }
     else

docs/mkdocs/docs/home/customers.md

@@ -13,7 +13,7 @@ the result of an internet search. If you know further customers of the library,
 
 - [**Alexa Auto SDK**](https://github.com/alexa/alexa-auto-sdk), a software development kit enabling the integration of Alexa into automotive systems
 - [**Apollo**](https://github.com/ApolloAuto/apollo), a framework for building autonomous driving systems
-- [**Automotive Grade Linux (AGL)**](https://download.automotivelinux.org/AGL/release/jellyfish/latest/qemux86-64/deploy/licenses/nlohmann-json/), a collaborative open-source platform for automotive software development
+- [**Automotive Grade Linux (AGL)**](https://download.automotivelinux.org/AGL/release/jellyfish/latest/qemux86-64/deploy/licenses/nlohmann-json/): a collaborative open-source platform for automotive software development
 - [**Genesis Motor** (infotainment)](http://webmanual.genesis.com/ccIC/AVNT/JW/KOR/English/reference010.html), a luxury automotive brand
 - [**Hyundai** (infotainment)](https://www.hyundai.com/wsvc/ww/download.file.do?id=/content/hyundai/ww/data/opensource/data/GN7-2022/licenseCode/info), a global automotive brand
 - [**Kia** (infotainment)](http://webmanual.kia.com/PREM_GEN6/AVNT/RJPE/KOR/Korean/reference010.html), a global automotive brand
@@ -23,36 +23,30 @@ the result of an internet search. If you know further customers of the library,
 
 ## Gaming and Entertainment
 
-- [**Assassin's Creed: Mirage**](https://www.mobygames.com/person/1195889/niels-lohmann/credits/), a stealth-action game set in the Middle East, focusing on the journey of a young assassin with classic parkour and stealth mechanics
+- [**Assassin's Creed: Mirage**](https://www.mobygames.com/person/1195889/niels-lohmann/credits/): a stealth-action game set in the Middle East, focusing on the journey of a young assassin with classic parkour and stealth mechanics
-- [**Chasm: The Rift**](https://www.mobygames.com/person/1195889/niels-lohmann/credits/), a first-person shooter blending horror and adventure, where players navigate dark realms and battle monsters
+- [**Chasm: The Rift**](https://www.mobygames.com/person/1195889/niels-lohmann/credits/): a first-person shooter blending horror and adventure, where players navigate dark realms and battle monsters
-- [**College Football 25**](https://www.mobygames.com/person/1195889/niels-lohmann/credits/), a college football simulation game featuring gameplay that mimics real-life college teams and competitions
+- [**College Football 25**](https://www.mobygames.com/person/1195889/niels-lohmann/credits/): a college football simulation game featuring gameplay that mimics real-life college teams and competitions
-- [**Concepts**](https://concepts.app/en/licenses), a digital sketching app designed for creative professionals, offering flexible drawing tools for illustration, design, and brainstorming
+- [**Concepts**](https://concepts.app/en/licenses): a digital sketching app designed for creative professionals, offering flexible drawing tools for illustration, design, and brainstorming
-- [**Depthkit**](https://www.depthkit.tv/third-party-licenses), a tool for creating and capturing volumetric video, enabling immersive 3D experiences and interactive content
+- [**Depthkit**](https://www.depthkit.tv/third-party-licenses): a tool for creating and capturing volumetric video, enabling immersive 3D experiences and interactive content
-- [**IMG.LY**](https://img.ly/acknowledgements), a platform offering creative tools and SDKs for integrating advanced image and video editing in applications
+- [**immersivetech**](https://immersitech.io/open-source-third-party-software/): a technology company focused on immersive experiences, providing tools and solutions for virtual and augmented reality applications
 - [**LOOT**](https://loot.readthedocs.io/_/downloads/en/0.13.0/pdf/), a tool for optimizing the load order of game plugins, commonly used in The Elder Scrolls and Fallout series
-- [**Madden NFL 25**](https://www.mobygames.com/person/1195889/niels-lohmann/credits/), a sports simulation game capturing the excitement of American football with realistic gameplay and team management features
+- [**Madden NFL 25**](https://www.mobygames.com/person/1195889/niels-lohmann/credits/): a sports simulation game capturing the excitement of American football with realistic gameplay and team management features
 - [**Marne**](https://marne.io/licenses), an unofficial private server platform for hosting custom Battlefield 1 game experiences
 - [**Minecraft**](https://www.minecraft.net/zh-hant/attribution), a popular sandbox video game
-- [**NHL 22**](https://www.mobygames.com/person/1195889/niels-lohmann/credits/), a hockey simulation game offering realistic gameplay, team management, and various modes to enhance the hockey experience
+- [**NHL 22**](https://www.mobygames.com/person/1195889/niels-lohmann/credits/): a hockey simulation game offering realistic gameplay, team management, and various modes to enhance the hockey experience
-- [**Pixelpart**](https://pixelpart.net/documentation/book/third-party.html), a 2D animation and video compositing software that allows users to create animated graphics and visual effects with a focus on simplicity and ease of use
+- [**Pixelpart**](https://pixelpart.net/documentation/book/third-party.html): a 2D animation and video compositing software that allows users to create animated graphics and visual effects with a focus on simplicity and ease of use
-- [**Razer Cortex**](https://mysupport.razer.com/app/answers/detail/a_id/14146/~/open-source-software-for-razer-software), a gaming performance optimizer and system booster designed to enhance the gaming experience
+- [**Red Dead Redemption II**](https://www.mobygames.com/person/1195889/niels-lohmann/credits/): an open-world action-adventure game following an outlaw's story in the late 1800s, emphasizing deep storytelling and immersive gameplay
-- [**Red Dead Redemption II**](https://www.mobygames.com/person/1195889/niels-lohmann/credits/), an open-world action-adventure game following an outlaw's story in the late 1800s, emphasizing deep storytelling and immersive gameplay
-- [**Snapchat**](https://www.snap.com/terms/license-android), a multimedia messaging and augmented reality app for communication and entertainment
 - [**Tactics Ogre: Reborn**](https://www.square-enix-games.com/en_US/documents/tactics-ogre-reborn-pc-installer-software-and-associated-plug-ins-disclosure), a tactical role-playing game featuring strategic battles and deep storytelling elements
 - [**Throne and Liberty**](https://www.amazon.com/gp/help/customer/display.html?nodeId=T7fLNw5oAevCMtJFPj&pop-up=1), an MMORPG that offers an expansive fantasy world with dynamic gameplay and immersive storytelling
 - [**Unity Vivox**](https://docs.unity3d.com/Packages/com.unity.services.vivox@15.1/license/Third%20Party%20Notices.html), a communication service that enables voice and text chat functionality in multiplayer games developed with Unity
-- [**Zool: Redimensioned**](https://www.mobygames.com/person/1195889/niels-lohmann/credits/), a modern reimagining of the classic platformer featuring fast-paced gameplay and vibrant environments
+- [**Zool: Redimensioned**](https://www.mobygames.com/person/1195889/niels-lohmann/credits/): a modern reimagining of the classic platformer featuring fast-paced gameplay and vibrant environments
-- [**immersivetech**](https://immersitech.io/open-source-third-party-software/), a technology company focused on immersive experiences, providing tools and solutions for virtual and augmented reality applications
 
 ## Consumer Electronics
 
-- [**Audinate**](https://www.audinate.com/legal/software-licensing/dante-av-h-open-source-licenses/), a provider of networked audio solutions specializing in Dante technology, which facilitates high-quality digital audio transport over IP networks
+- [**Audinate**](https://www.audinate.com/legal/software-licensing/dante-av-h-open-source-licenses/): a provider of networked audio solutions specializing in Dante technology, which facilitates high-quality digital audio transport over IP networks
-- [**Canon CanoScan LIDE**](https://carolburo.com/wp-content/uploads/2024/06/LiDE400_OnlineManual_Win_FR_V02.pdf), a series of flatbed scanners offering high-resolution image scanning for home and office use
-- [**Canon PIXMA Printers**](https://www.mediaexpert.pl/products/files/73/7338196/Instrukcja-obslugi-CANON-Pixma-TS7450i.pdf), a line of all-in-one inkjet printers known for high-quality printing and wireless connectivity
 - [**Cisco Webex Desk Camera**](https://www.cisco.com/c/dam/en_us/about/doing_business/open_source/docs/CiscoWebexDeskCamera-23-1622100417.pdf), a video camera designed for professional-quality video conferencing and remote collaboration
-- [**Philips Hue Personal Wireless Lighting**](http://2ak5ape.257.cz/), a smart lighting system for customizable and wireless home illumination
+- [**Philips Hue Personal Wireless Lighting**](http://2ak5ape.257.cz/): a smart lighting system for customizable and wireless home illumination
 - [**Ray-Ban Meta Smart glasses**](https://www.meta.com/de/en/legal/smart-glasses/third-party-notices-android/03/), a pair of smart glasses designed for capturing photos and videos with integrated connectivity and social features
-- [**Razer Synapse**](https://mysupport.razer.com/app/answers/detail/a_id/14146/~/open-source-software-for-razer-software), a unified configuration software enabling hardware customization for Razer devices
 - [**Siemens SINEMA Remote Connect**](https://cache.industry.siemens.com/dl/files/790/109793790/att_1054961/v2/OSS_SINEMA-RC_86.pdf), a remote connectivity solution for monitoring and managing industrial networks and devices securely
 - [**Sony PlayStation 4**](https://doc.dl.playstation.net/doc/ps4-oss/index.html), a gaming console developed by Sony that offers a wide range of games and multimedia entertainment features
 - [**Sony Virtual Webcam Driver for Remote Camera**](https://helpguide.sony.net/rc/vwd/v1/zh-cn/print.pdf), a software driver that enables the use of Sony cameras as virtual webcams for video conferencing and streaming
@@ -62,7 +56,7 @@ the result of an internet search. If you know further customers of the library,
 - [**Apple iOS and macOS**](https://www.apple.com/macos), a family of operating systems developed by Apple, including iOS for mobile devices and macOS for desktop computers
 - [**Google Fuchsia**](https://fuchsia.googlesource.com/third_party/json/), an open-source operating system developed by Google, designed to be secure, updatable, and adaptable across various devices
 - [**SerenityOS**](https://github.com/SerenityOS/serenity), an open-source operating system that aims to provide a simple and beautiful user experience with a focus on simplicity and elegance
-- [**Yocto**](http://ftp.emacinc.com/openembedded-sw/kirkstone-icop-5.15-kirkstone-6.0/archive-2024-10/pn8m-090t-ppc/licenses/nlohmann-json/), a Linux-based build system for creating custom operating systems and software distributions, tailored for embedded devices and IoT applications
+- [**Yocto**](http://ftp.emacinc.com/openembedded-sw/kirkstone-icop-5.15-kirkstone-6.0/archive-2024-10/pn8m-090t-ppc/licenses/nlohmann-json/): a Linux-based build system for creating custom operating systems and software distributions, tailored for embedded devices and IoT applications
 
 ## Development Tools and IDEs
 
@@ -72,72 +66,67 @@ the result of an internet search. If you know further customers of the library,
 - [**CoderPad**](https://coderpad.io), a collaborative coding platform that enables real-time code interviews and assessments for developers; the library is included in every CoderPad instance and can be accessed with a simple `#include "json.hpp"`
 - [**Compiler Explorer**](https://godbolt.org), a web-based tool that allows users to write, compile, and visualize the assembly output of code in various programming languages; the library is readily available and accessible with the directive `#include <nlohmann/json.hpp>`.
 - [**GitHub CodeQL**](https://github.com/github/codeql), a code analysis tool used for identifying security vulnerabilities and bugs in software through semantic queries
-- [**Hex-Rays**](https://docs.hex-rays.com/user-guide/user-interface/licenses), a reverse engineering toolset for analyzing and decompiling binaries, primarily used for security research and vulnerability analysis
+- [**Hex-Rays**](https://docs.hex-rays.com/user-guide/user-interface/licenses): a reverse engineering toolset for analyzing and decompiling binaries, primarily used for security research and vulnerability analysis
 - [**ImHex**](https://github.com/WerWolv/ImHex), a hex editor designed for reverse engineering, providing advanced features for data analysis and manipulation
 - [**Intel GPA Framework**](https://intel.github.io/gpasdk-doc/src/licenses.html), a suite of cross-platform tools for capturing, analyzing, and optimizing graphics applications across different APIs
-- [**Intopix**](https://www.intopix.com/software-licensing), a provider of advanced image processing and compression solutions used in software development and AV workflows
-- [**MKVToolNix**](https://mkvtoolnix.download/doc/README.md), a set of tools for creating, editing, and inspecting MKV (Matroska) multimedia container files
 - [**Meta Yoga**](https://github.com/facebook/yoga), a layout engine that facilitates flexible and efficient user interface design across multiple platforms
+- [**MKVToolNix**](https://mkvtoolnix.download/doc/README.md), a set of tools for creating, editing, and inspecting MKV (Matroska) multimedia container files
 - [**NVIDIA Nsight Compute**](https://docs.nvidia.com/nsight-compute/2022.2/pdf/CopyrightAndLicenses.pdf), a performance analysis tool for CUDA applications that provides detailed insights into GPU performance metrics
 - [**Notepad++**](https://github.com/notepad-plus-plus/notepad-plus-plus), a free source code editor that supports various programming languages
 - [**OpenRGB**](https://gitlab.com/CalcProgrammer1/OpenRGB), an open source RGB lighting control that doesn't depend on manufacturer software
-- [**OpenTelemetry C++**](https://github.com/open-telemetry/opentelemetry-cpp), a library for collecting and exporting observability data in C++, enabling developers to implement distributed tracing and metrics in their application
+- [**OpenTelemetry C++**](https://github.com/open-telemetry/opentelemetry-cpp): a library for collecting and exporting observability data in C++, enabling developers to implement distributed tracing and metrics in their application
 - [**Qt Creator**](https://doc.qt.io/qtcreator/qtcreator-attribution-json-nlohmann.html), an IDE for developing applications using the Qt application framework
-- [**Scanbot SDK**](https://docs.scanbot.io/barcode-scanner-sdk/web/third-party-libraries/), a software development kit (SDK) that provides tools for integrating advanced document scanning and barcode scanning capabilities into applications
+- [**Scanbot SDK**](https://docs.scanbot.io/barcode-scanner-sdk/web/third-party-libraries/): a software development kit (SDK) that provides tools for integrating advanced document scanning and barcode scanning capabilities into applications
 
 ## Machine Learning and AI
 
 - [**Apple Core ML Tools**](https://github.com/apple/coremltools), a set of tools for converting and configuring machine learning models for deployment in Apple's Core ML framework
-- [**Avular Mobile Robotics**](https://www.avular.com/licenses/nlohmann-json-3.9.1.txt), a platform for developing and deploying mobile robotics solutions
+- [**Avular Mobile Robotics**](https://www.avular.com/licenses/nlohmann-json-3.9.1.txt): a platform for developing and deploying mobile robotics solutions
 - [**Google gemma.cpp**](https://github.com/google/gemma.cpp), a lightweight C++ inference engine designed for running AI models from the Gemma family
 - [**llama.cpp**](https://github.com/ggerganov/llama.cpp), a C++ library designed for efficient inference of large language models (LLMs), enabling streamlined integration into applications
 - [**MLX**](https://github.com/ml-explore/mlx), an array framework for machine learning on Apple Silicon
 - [**Mozilla llamafile**](https://github.com/Mozilla-Ocho/llamafile), a tool designed for distributing and executing large language models (LLMs) efficiently using a single file format
 - [**NVIDIA ACE**](https://docs.nvidia.com/ace/latest/index.html), a suite of real-time AI solutions designed for the development of interactive avatars and digital human applications, enabling scalable and sophisticated user interactions
-- [**Peer**](https://support.peer.inc/hc/en-us/articles/17261335054235-Licenses), a platform offering personalized AI assistants for interactive learning and creative collaboration
+- [**Peer**](https://support.peer.inc/hc/en-us/articles/17261335054235-Licenses): a platform offering personalized AI assistants for interactive learning and creative collaboration
-- [**stable-diffusion.cpp**](https://github.com/leejet/stable-diffusion.cpp), a C++ implementation of the Stable Diffusion image generation model
+- [**stable-diffusion.cpp**](https://github.com/leejet/stable-diffusion.cpp): a C++ implementation of the Stable Diffusion image generation model
-- [**TanvasTouch**](https://tanvas.co/tanvastouch-sdk-third-party-acknowledgments), a software development kit (SDK) that enables developers to create tactile experiences on touchscreens, allowing users to feel textures and physical sensations in a digital environment
+- [**TanvasTouch**](https://tanvas.co/tanvastouch-sdk-third-party-acknowledgments): a software development kit (SDK) that enables developers to create tactile experiences on touchscreens, allowing users to feel textures and physical sensations in a digital environment
 - [**TensorFlow**](https://github.com/tensorflow/tensorflow), a machine learning framework that facilitates the development and training of models, supporting data serialization and efficient data exchange between components
 
 ## Scientific Research and Analysis
 
 - [**BLACK**](https://www.black-sat.org/en/stable/installation/linux.html), a bounded linear temporal logic (LTL) satisfiability checker
 - [**CERN Atlas Athena**](https://gitlab.cern.ch/atlas/athena/-/blob/main/Control/PerformanceMonitoring/PerfMonComps/src/PerfMonMTSvc.h), a software framework used in the ATLAS experiment at the Large Hadron Collider (LHC) for performance monitoring
-- [**ICU**](https://github.com/unicode-org/icu), the International Components for Unicode, a mature library for software globalization and multilingual support
+- [**KAMERA**](https://github.com/Kitware/kamera): a platform for synchronized data collection and real-time deep learning to map marine species like polar bears and seals, aiding Arctic ecosystem research
-- [**KAMERA**](https://github.com/Kitware/kamera), a platform for synchronized data collection and real-time deep learning to map marine species like polar bears and seals, aiding Arctic ecosystem research
+- [**KiCad**](https://gitlab.com/kicad/code/kicad/-/tree/master/thirdparty/nlohmann_json): a free and open-source software suite for electronic design automation
-- [**KiCad**](https://gitlab.com/kicad/code/kicad/-/tree/master/thirdparty/nlohmann_json), a free and open-source software suite for electronic design automation
+- [**MeVisLab**](https://mevislabdownloads.mevis.de/docs/current/MeVis/ThirdParty/Documentation/Publish/ThirdPartyReference/index.html): a software framework for medical image processing and visualization.
-- [**Maple**](https://www.maplesoft.com/support/help/Maple/view.aspx?path=copyright), a symbolic and numeric computing environment for advanced mathematical modeling and analysis
+- [**OpenPMD API**](https://openpmd-api.readthedocs.io/en/0.8.0-alpha/backends/json.html): a versatile programming interface for accessing and managing scientific data, designed to facilitate the efficient storage, retrieval, and sharing of simulation data across various applications and platforms
-- [**MeVisLab**](https://mevislabdownloads.mevis.de/docs/current/MeVis/ThirdParty/Documentation/Publish/ThirdPartyReference/index.html), a software framework for medical image processing and visualization.
+- [**ParaView**](https://github.com/Kitware/ParaView): an open-source tool for large-scale data visualization and analysis across various scientific domains
-- [**OpenPMD API**](https://openpmd-api.readthedocs.io/en/0.8.0-alpha/backends/json.html), a versatile programming interface for accessing and managing scientific data, designed to facilitate the efficient storage, retrieval, and sharing of simulation data across various applications and platforms
+- [**QGIS**](https://gitlab.b-data.ch/qgis/qgis/-/blob/backport-57658-to-release-3_34/external/nlohmann/json.hpp): a free and open-source geographic information system (GIS) application that allows users to create, edit, visualize, and analyze geospatial data across a variety of formats
-- [**ParaView**](https://github.com/Kitware/ParaView), an open-source tool for large-scale data visualization and analysis across various scientific domains
+- [**VTK**](https://github.com/Kitware/VTK): a software library for 3D computer graphics, image processing, and visualization
-- [**QGIS**](https://gitlab.b-data.ch/qgis/qgis/-/blob/backport-57658-to-release-3_34/external/nlohmann/json.hpp), a free and open-source geographic information system (GIS) application that allows users to create, edit, visualize, and analyze geospatial data across a variety of formats
+- [**VolView**](https://github.com/Kitware/VolView): a lightweight application for interactive visualization and analysis of 3D medical imaging data.
-- [**VTK**](https://github.com/Kitware/VTK), a software library for 3D computer graphics, image processing, and visualization
-- [**VolView**](https://github.com/Kitware/VolView), a lightweight application for interactive visualization and analysis of 3D medical imaging data.
 
 ## Business and Productivity Software
 
 - [**ArcGIS PRO**](https://www.esri.com/content/dam/esrisites/en-us/media/legal/open-source-acknowledgements/arcgis-pro-2-8-attribution-report.html), a desktop geographic information system (GIS) application developed by Esri for mapping and spatial analysis
 - [**Autodesk Desktop**](https://damassets.autodesk.net/content/dam/autodesk/www/Company/legal-notices-trademarks/autodesk-desktop-platform-components/internal-autodesk-components-web-page-2023.pdf), a software platform developed by Autodesk for creating and managing desktop applications and services
-- [**Check Point**](https://www.checkpoint.com/about-us/copyright-and-trademarks/), a cybersecurity company specializing in threat prevention and network security solutions, offering a range of products designed to protect enterprises from cyber threats and ensure data integrity
+- [**Check Point**](https://www.checkpoint.com/about-us/copyright-and-trademarks/): a cybersecurity company specializing in threat prevention and network security solutions, offering a range of products designed to protect enterprises from cyber threats and ensure data integrity
 - [**Microsoft Office for Mac**](https://officecdnmac.microsoft.com/pr/legal/mac/OfficeforMacAttributions.html), a suite of productivity applications developed by Microsoft for macOS, including tools for word processing, spreadsheets, and presentations
 - [**Microsoft Teams**](https://www.microsoft.com/microsoft-teams/), a team collaboration application offering workspace chat and video conferencing, file storage, and integration of proprietary and third-party applications and services
-- [**Nexthink Infinity**](https://docs.nexthink.com/legal/services-terms/experience-open-source-software-licenses/infinity-2022.8-software-licenses), a digital employee experience management platform for monitoring and improving IT performance
+- [**Nexthink Infinity**](https://docs.nexthink.com/legal/services-terms/experience-open-source-software-licenses/infinity-2022.8-software-licenses): a digital employee experience management platform for monitoring and improving IT performance
-- [**Sophos Connect Client**](https://docs.sophos.com/nsg/licenses/SophosConnect/SophosConnectAttribution.html), a secure VPN client from Sophos that allows remote users to connect to their corporate network, ensuring secure access to resources and data
+- [**Sophos Connect Client**](https://docs.sophos.com/nsg/licenses/SophosConnect/SophosConnectAttribution.html): a secure VPN client from Sophos that allows remote users to connect to their corporate network, ensuring secure access to resources and data
-- [**Stonebranch**](https://stonebranchdocs.atlassian.net/wiki/spaces/UA77/pages/799545647/Licenses+for+Third-Party+Libraries), a cloud-based cybersecurity solution that integrates backup, disaster recovery, and cybersecurity features to protect data and ensure business continuity for organizations
+- [**Stonebranch**](https://stonebranchdocs.atlassian.net/wiki/spaces/UA77/pages/799545647/Licenses+for+Third-Party+Libraries): a cloud-based cybersecurity solution that integrates backup, disaster recovery, and cybersecurity features to protect data and ensure business continuity for organizations
-- [**Tablecruncher**](https://tablecruncher.com/), a data analysis tool that allows users to import, analyze, and visualize spreadsheet data, offering interactive features for better insights and decision-making
+- [**Tablecruncher**](https://tablecruncher.com/): a data analysis tool that allows users to import, analyze, and visualize spreadsheet data, offering interactive features for better insights and decision-making
 - [**magicplan**](https://help.magicplan.app/acknowledgments), a mobile application for creating floor plans and interior designs using augmented reality
 
 ## Databases and Big Data
 
-- [**ADIOS2**](https://code.ornl.gov/ecpcitest/adios2/-/tree/pr4285_FFSUpstream/thirdparty/nlohmann_json?ref_type=heads), a data management framework designed for high-performance input and output operations
+- [**ADIOS2**](https://code.ornl.gov/ecpcitest/adios2/-/tree/pr4285_FFSUpstream/thirdparty/nlohmann_json?ref_type=heads): a data management framework designed for high-performance input and output operations
-- [**Cribl Stream**](https://docs.cribl.io/stream/third-party-current-list/), a real-time data processing platform that enables organizations to collect, route, and transform observability data, enhancing visibility and insights into their systems
+- [**Cribl Stream**](https://docs.cribl.io/stream/third-party-current-list/): a real-time data processing platform that enables organizations to collect, route, and transform observability data, enhancing visibility and insights into their systems
 - [**DB Browser for SQLite**](https://github.com/sqlitebrowser/sqlitebrowser), a visual open-source tool for creating, designing, and editing SQLite database files
 - [**MySQL Connector/C++**](https://docs.oracle.com/cd/E17952_01/connector-cpp-9.1-license-com-en/license-opentelemetry-cpp-com.html), a C++ library for connecting and interacting with MySQL databases
 - [**MySQL NDB Cluster**](https://downloads.mysql.com/docs/licenses/cluster-9.0-com-en.pdf), a distributed database system that provides high availability and scalability for MySQL databases
-- [**MySQL Shell**](https://downloads.mysql.com/docs/licenses/mysql-shell-8.0-gpl-en.pdf), an advanced client and code editor for interacting with MySQL servers, supporting SQL, Python, and JavaScript
 - [**PrestoDB**](https://github.com/prestodb/presto), a distributed SQL query engine designed for large-scale data analytics, originally developed by Facebook
 - [**ROOT Data Analysis Framework**](https://root.cern/doc/v614/classnlohmann_1_1basic__json.html), an open-source data analysis framework widely used in high-energy physics and other fields for data processing and visualization
-- [**WiredTiger**](https://github.com/wiredtiger/wiredtiger), a high-performance storage engine for databases, offering support for compression, concurrency, and checkpointing
 
 ## Simulation and Modeling
 
@@ -145,33 +134,30 @@ the result of an internet search. If you know further customers of the library,
 - [**azul**](https://pure.tudelft.nl/ws/files/85338589/tgis.12673.pdf), a fast and efficient 3D city model viewer designed for visualizing urban environments and spatial data
 - [**Blender**](https://projects.blender.org/blender/blender/search?q=nlohmann), a free and open-source 3D creation suite for modeling, animation, rendering, and more
 - [**cpplot**](https://cpplot.readthedocs.io/en/latest/library_api/function_eigen_8h_1ac080eac0541014c5892a55e41bf785e6.html), a library for creating interactive graphs and charts in C++, which can be viewed in web browsers
-- [**Foundry Nuke**](https://learn.foundry.com/nuke/content/misc/studio_third_party_libraries.html), a powerful node-based digital compositing and visual effects application used in film and television post-production
-- [**GAMS**](https://www.gams.com/47/docs/THIRDPARTY.html), a high-performance mathematical modeling system for optimization and decision support
-- [**Kitware SMTK**](https://github.com/Kitware/SMTK), a software toolkit for managing simulation models and workflows in scientific and engineering applications
-- [**M-Star**](https://docs.mstarcfd.com/3_Licensing/thirdparty-licenses.html), a computational fluid dynamics software for simulating and analyzing fluid flow
-- [**MapleSim CAD Toolbox**](https://www.maplesoft.com/support/help/MapleSim/view.aspx?path=CADToolbox/copyright), a software extension for MapleSim that integrates CAD models, allowing users to import, manipulate, and analyze 3D CAD data within the MapleSim environment for enhanced modeling and simulation
 - [**NVIDIA Omniverse**](https://docs.omniverse.nvidia.com/composer/latest/common/product-licenses/usd-explorer/usd-explorer-2023.2.0-licenses-manifest.html), a platform for 3D content creation and collaboration that enables real-time simulations and interactive experiences across various industries
 - [**Pixar Renderman**](https://rmanwiki-26.pixar.com/space/REN26/19662083/Legal+Notice), a photorealistic 3D rendering software developed by Pixar, widely used in the film industry for creating high-quality visual effects and animations
 - [**ROS - Robot Operating System**](http://docs.ros.org/en/noetic/api/behaviortree_cpp/html/json_8hpp_source.html), a set of software libraries and tools that assist in developing robot applications
 - [**UBS**](https://www.ubs.com/), a multinational financial services and banking company
+- [**GAMS**](https://www.gams.com/47/docs/THIRDPARTY.html): a high-performance mathematical modeling system for optimization and decision support
+- [**M-Star**](https://docs.mstarcfd.com/3_Licensing/thirdparty-licenses.html): a computational fluid dynamics software for simulating and analyzing fluid flow
+- [**MapleSim CAD Toolbox**](https://www.maplesoft.com/support/help/MapleSim/view.aspx?path=CADToolbox/copyright): a software extension for MapleSim that integrates CAD models, allowing users to import, manipulate, and analyze 3D CAD data within the MapleSim environment for enhanced modeling and simulation
+- [**Kitware SMTK**](https://github.com/Kitware/SMTK): a software toolkit for managing simulation models and workflows in scientific and engineering applications
 
 ## Enterprise and Cloud Applications
 
-- [**Acronis Cyber Protect Cloud**](https://care.acronis.com/s/article/59533-Third-party-software-used-in-Acronis-Cyber-Protect-Cloud?language=en_US), an all-in-one data protection solution that combines backup, disaster recovery, and cybersecurity to safeguard business data from threats like ransomware
+- [**Acronis Cyber Protect Cloud**](https://care.acronis.com/s/article/59533-Third-party-software-used-in-Acronis-Cyber-Protect-Cloud?language=en_US): an all-in-one data protection solution that combines backup, disaster recovery, and cybersecurity to safeguard business data from threats like ransomware
-- [**Baereos**](https://gitlab.tiger-computing.co.uk/packages/bareos/-/blob/tiger/bullseye/third-party/CLI11/examples/json.cpp), a backup solution that provides data protection and recovery options for various environments, including physical and virtual systems
+- [**Baereos**](https://gitlab.tiger-computing.co.uk/packages/bareos/-/blob/tiger/bullseye/third-party/CLI11/examples/json.cpp): a backup solution that provides data protection and recovery options for various environments, including physical and virtual systems
 - [**Bitdefender Home Scanner**](https://www.bitdefender.de/site/Main/view/home-scanner-open-source.html), a tool from Bitdefender that scans devices for malware and security threats, providing a safeguard against potential online dangers
-- [**Citrix Provisioning**](https://docs.citrix.com/en-us/provisioning/2203-ltsr/downloads/pvs-third-party-notices-2203.pdf), a solution that streamlines the delivery of virtual desktops and applications by allowing administrators to manage and provision resources efficiently across multiple environments
+- [**Citrix Provisioning**](https://docs.citrix.com/en-us/provisioning/2203-ltsr/downloads/pvs-third-party-notices-2203.pdf): a solution that streamlines the delivery of virtual desktops and applications by allowing administrators to manage and provision resources efficiently across multiple environments
 - [**Citrix Virtual Apps and Desktops**](https://docs.citrix.com/en-us/citrix-virtual-apps-desktops/2305/downloads/third-party-notices-apps-and-desktops.pdf), a solution from Citrix that delivers virtual apps and desktops
-- [**Cyberarc**](https://docs.cyberark.com/Downloads/Legal/Privileged%20Session%20Manager%20for%20SSH%20Third-Party%20Notices.pdf), a security solution that specializes in privileged access management, enabling organizations to control and monitor access to critical systems and data, thereby enhancing overall cybersecurity posture
+- [**Cyberarc**](https://docs.cyberark.com/Downloads/Legal/Privileged%20Session%20Manager%20for%20SSH%20Third-Party%20Notices.pdf): a security solution that specializes in privileged access management, enabling organizations to control and monitor access to critical systems and data, thereby enhancing overall cybersecurity posture
-- [**Egnyte Desktop**](https://helpdesk.egnyte.com/hc/en-us/articles/360007071732-Third-Party-Software-Acknowledgements), a secure cloud storage solution designed for businesses, enabling file sharing, collaboration, and data management across teams while ensuring compliance and data protection
+- [**Elster**](https://www.secunet.com/en/about-us/press/article/elstersecure-bietet-komfortablen-login-ohne-passwort-dank-secunet-protect4use): a digital platform developed by German tax authorities for secure and efficient electronic tax filing and management using secunet protect4use
-- [**Elster**](https://www.secunet.com/en/about-us/press/article/elstersecure-bietet-komfortablen-login-ohne-passwort-dank-secunet-protect4use), a digital platform developed by German tax authorities for secure and efficient electronic tax filing and management using secunet protect4use
+- [**Egnyte Desktop**](https://helpdesk.egnyte.com/hc/en-us/articles/360007071732-Third-Party-Software-Acknowledgements): a secure cloud storage solution designed for businesses, enabling file sharing, collaboration, and data management across teams while ensuring compliance and data protection
 - [**Ethereum Solidity**](https://github.com/ethereum/solidity), a high-level, object-oriented programming language designed for implementing smart contracts on the Ethereum platform
-- [**Inciga**](https://fossies.org/linux/icinga2/third-party/nlohmann_json/json.hpp), a monitoring tool for IT infrastructure, designed to provide insights into system performance and availability through customizable dashboards and alerts
+- [**Inciga**](https://fossies.org/linux/icinga2/third-party/nlohmann_json/json.hpp): a monitoring tool for IT infrastructure, designed to provide insights into system performance and availability through customizable dashboards and alerts
-- [**Intel Accelerator Management Daemon for VMware ESXi**](https://downloadmirror.intel.com/772507/THIRD-PARTY.txt), a management tool designed for monitoring and controlling Intel hardware accelerators within VMware ESXi environments, optimizing performance and resource allocation
+- [**Intel Accelerator Management Daemon for VMware ESXi**](https://downloadmirror.intel.com/772507/THIRD-PARTY.txt): a management tool designed for monitoring and controlling Intel hardware accelerators within VMware ESXi environments, optimizing performance and resource allocation
 - [**Juniper Identity Management Service**](https://www.juniper.net/documentation/us/en/software/jims/jims-guide/jims-guide.pdf)
 - [**Microsoft Azure IoT SDK**](https://library.e.abb.com/public/2779c5f85f30484192eb3cb3f666a201/IP%20Gateway%20Open%20License%20Declaration_9AKK108467A4095_Rev_C.pdf), a collection of tools and libraries to help developers connect, build, and deploy Internet of Things (IoT) solutions on the Azure cloud platform
 - [**Microsoft WinGet**](https://github.com/microsoft/winget-cli), a command-line utility included in the Windows Package Manager
-- [**plexusAV**](https://www.sisme.com/media/10994/manual_plexusav-p-avn-4-form8244-c.pdf), a high-performance AV-over-IP transceiver device capable of video encoding and decoding using the IPMX standard
+- [**Pointr**](https://docs-dev.pointr.tech/docs/8.x/Developer%20Portal/Open%20Source%20Licenses/): a platform for indoor positioning and navigation solutions, offering tools and SDKs for developers to create location-based applications
-- [**Pointr**](https://docs-dev.pointr.tech/docs/8.x/Developer%20Portal/Open%20Source%20Licenses/), a platform for indoor positioning and navigation solutions, offering tools and SDKs for developers to create location-based applications
+- [**secunet protect4use**](https://www.secunet.com/en/about-us/press/article/elstersecure-bietet-komfortablen-login-ohne-passwort-dank-secunet-protect4use): a secure, passwordless multifactor authentication solution that transforms smartphones into digital keyrings, ensuring high security for online services and digital identities
-- [**secunet protect4use**](https://www.secunet.com/en/about-us/press/article/elstersecure-bietet-komfortablen-login-ohne-passwort-dank-secunet-protect4use), a secure, passwordless multifactor authentication solution that transforms smartphones into digital keyrings, ensuring high security for online services and digital identities
-- [**Sencore MRD 7000**](https://www.foccusdigital.com/wp-content/uploads/2025/03/MRD-7000-Manual-8175V.pdf), a professional multi-channel receiver and decoder supporting UHD and HD stream decoding

docs/mkdocs/docs/home/exceptions.md

@@ -900,13 +900,3 @@ A JSON Patch operation 'test' failed. The unsuccessful operation is also printed
     ```
     [json.exception.other_error.501] unsuccessful: {"op":"test","path":"/baz","value":"bar"}
     ```
-
-### json.exception.other_error.502
-
-This exception is thrown when a null pointer is passed as SAX event listener to the [sax_parse](../api/basic_json/sax_parse.md) function.
-
-!!! failure "Example message"
-
-    ```
-    [json.exception.other_error.502] SAX handler must not be null
-    ```

docs/mkdocs/docs/home/license.md

@@ -4,7 +4,7 @@
 
 The class is licensed under the [MIT License](https://opensource.org/licenses/MIT):
 
-Copyright © 2013-2026 [Niels Lohmann](https://nlohmann.me)
+Copyright © 2013-2025 [Niels Lohmann](https://nlohmann.me)
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 

docs/mkdocs/docs/home/releases.md

@@ -251,7 +251,7 @@ http://nlohmann.github.io/json/doxygen/classnlohmann_1_1basic__json_a0a45fc74063
 - Fixed typos and broken links in README. #1417 #1423 #1425 #1451 #1455 #1491
 - Fixed documentation of parse function. #1473
 - Suppressed warning that cannot be fixed inside the library. #1401 #1468
-- Improved package manager suppert:
+- Imroved package manager suppert:
     - Updated Buckaroo instructions. #1495
     - Improved Meson support. #1463
     - Added Conda package manager documentation. #1430
@@ -685,7 +685,7 @@ After almost a year, here is finally a new release of JSON for Modern C++, and i
 
 This section describes changes that change the public API of the library and may require changes in code using a previous version of the library. In section "Moving from 2.x.x to 3.0.0" at the end of the release notes, we describe in detail how existing code needs to be changed.
 
-- The library now uses [**user-defined exceptions**](http://nlohmann.github.io/json/doxygen/classnlohmann_1_1basic__json_a9a0aced019cb1d65bb49703406c84970.html#a9a0aced019cb1d65bb49703406c84970) instead of reusing those defined in `<stdexcept>` (#244). This not only allows to add more information to the exceptions (every exception now has an identifier, and parse errors contain the position of the error), but also to easily catch all library exceptions with a single `catch(json::exception)`.
+- The library now uses [**user-defined exceptions**](http://nlohmann.github.io/json/doxygen/classnlohmann_1_1basic__json_a9a0aced019cb1d65bb49703406c84970.html#a9a0aced019cb1d65bb49703406c84970) instead of re-using those defined in `<stdexcept>` (#244). This not only allows to add more information to the exceptions (every exception now has an identifier, and parse errors contain the position of the error), but also to easily catch all library exceptions with a single `catch(json::exception)`.
 - When strings with a different encoding as UTF-8 were stored in JSON values, their serialization could not be parsed by the library itself, as only UTF-8 is supported. To enforce this library limitation and improve consistency, **non-UTF-8 encoded strings now yield a `json::type_error` exception during serialization** (#838). The check for valid UTF-8 is realized with code from [Björn Hoehrmann](http://bjoern.hoehrmann.de/).
 - **NaN and infinity values can now be stored inside the JSON value** without throwing an exception. They are, however, still serialized as `null` (#388).
 - The library's iterator tag was changed from RandomAccessIterator to **[BidirectionalIterator](https://en.cppreference.com/w/cpp/named_req/BidirectionalIterator)** (#593). Supporting RandomAccessIterator was incorrect as it assumed an ordering of values in a JSON objects which are unordered by definition.
@@ -1185,7 +1185,7 @@ As `noexcept` and `constexpr` specifier have been added to several functions, th
 This release fixes several small bugs and adds functionality in a backwards-compatible manner. Compared to the [last version (1.0.0)](https://github.com/nlohmann/json/releases/tag/v1.0.0), the following changes have been made:
 
 ### Changes
-- _Fixed_: **Floating-point numbers** are now serialized and deserialized properly such that roundtripping works in more cases. [#185, #186, #190, #191, #194]
+- _Fixed_: **Floating-point numbers** are now serialized and deserialized properly such that rountripping works in more cases. [#185, #186, #190, #191, #194]
 - _Added_: The code now contains **assertions** to detect undefined behavior during development. As the standard function `assert` is used, the assertions can be switched off by defining the preprocessor symbol `NDEBUG` during compilation. [#168]
 - _Added_: It is now possible to get a **reference** to the stored values via the newly added function `get_ref()`. [#128, #184]
 - _Fixed_: Access to object values via keys (**`operator[]`**) now works with all kind of string representations. [#171, #189]

docs/mkdocs/docs/integration/migration_guide.md

@@ -187,7 +187,7 @@ conversions with calls to [`get`](../api/basic_json/get.md), [`get_to`](../api/b
 
       ```cpp
       nlohmann::json j = "Hello, world!";
-      auto s = j.get<std::string>();
+      auto s = j.template get<std::string>();
       ```
 
 === "Future-proof (alternative)"

docs/mkdocs/docs/integration/package_managers.md

@@ -1,6 +1,6 @@
 # Package Managers
 
-<p markdown style="text-align: center">
+<center>
 ![Homebrew](../images/package_managers/homebrew.svg){: style="height:1em"}&nbsp;[**Homebrew**](#homebrew) `nlohmann-json` &emsp;
 ![Meson](../images/package_managers/meson.svg){: style="height:1em"}&nbsp;[**Meson**](#meson) `nlohmann_json` &emsp;
 ![Bazel](../images/package_managers/bazel.svg){: style="height:1em"}&nbsp;[**Bazel**](#bazel) `nlohmann_json`<br>
@@ -15,7 +15,7 @@
 ![MacPorts](../images/package_managers/macports.svg){: style="height:1em"}&nbsp;[**MacPorts**](#macports) `nlohmann-json`<br>
 ![cpm.cmake](../images/package_managers/CPM.png){: style="height:1em"}&nbsp;[**CPM.cmake**](#cpmcmake) `gh:nlohmann/json`
 ![xmake](../images/package_managers/xmake.svg){: style="height:1em"}&nbsp;[**xmake**](#xmake) `nlohmann_json`
-</p>
+</center>
 
 ## Running example
 
@@ -38,7 +38,7 @@ When executed, this program should create output similar to
     formula: [**`nlohmann-json`**](https://formulae.brew.sh/formula/nlohmann-json)
 
     - [![Homebrew package](https://repology.org/badge/version-for-repo/homebrew/nlohmann-json.svg)](https://repology.org/project/nlohmann-json/versions)
-    - :octicons-tag-24: Available versions: current version and development version (with `--HEAD` parameter)
+    - :octicons-tag-24: Availalbe versions: current version and development version (with `--HEAD` parameter)
     - :octicons-rocket-24: The formula is updated with every release.
     - :octicons-person-24: Maintainer: Niels Lohmann
     - :octicons-file-24: File issues at the [Homebrew issue tracker](https://github.com/Homebrew/homebrew-core/issues)
@@ -103,7 +103,7 @@ The header can be used directly in your code or via CMake.
 
     wrap: **`nlohmann_json`**
 
-    - :octicons-tag-24: Available versions: current version and select older versions (see
+    - :octicons-tag-24: Availalbe versions: current version and select older versions (see
       [WrapDB](https://mesonbuild.com/Wrapdb-projects.html))
     - :octicons-rocket-24: The package is update automatically from file
       [`meson.build`](https://github.com/nlohmann/json/blob/develop/meson.build).
@@ -195,7 +195,7 @@ repository can be referenced within a `MODULE.bazel` by rules such as `archive_o
     recipe: [**`nlohmann_json`**](https://conan.io/center/recipes/nlohmann_json)
 
     - [![ConanCenter package](https://repology.org/badge/version-for-repo/conancenter/nlohmann-json.svg)](https://repology.org/project/nlohmann-json/versions)
-    - :octicons-tag-24: Available versions: current version and older versions (see
+    - :octicons-tag-24: Availalbe versions: current version and older versions (see
       [Conan Center](https://conan.io/center/recipes/nlohmann_json))
     - :octicons-rocket-24: The package is update automatically via
       [this recipe](https://github.com/conan-io/conan-center-index/tree/master/recipes/nlohmann_json).
@@ -241,7 +241,7 @@ requires, where `x.y.z` is the release version you want to use.
     package: [**`nlohmann-json`**](https://packages.spack.io/package.html?name=nlohmann-json)
 
     - [![Spack package](https://repology.org/badge/version-for-repo/spack/nlohmann-json.svg)](https://repology.org/project/nlohmann-json/versions)
-    - :octicons-tag-24: Available versions: current version and older versions (see
+    - :octicons-tag-24: Availalbe versions: current version and older versions (see
       [Spack package](https://packages.spack.io/package.html?name=nlohmann-json))
     - :octicons-rocket-24: The package is updated with every release.
     - :octicons-person-24: Maintainer: [Axel Huebl](https://github.com/ax3l)
@@ -294,7 +294,7 @@ Please see the [Spack project](https://github.com/spack/spack) for any issues re
 
     package: [**`nlohmann_json`**](https://hunter.readthedocs.io/en/latest/packages/pkg/nlohmann_json.html)
 
-    - :octicons-tag-24: Available versions: current version and older versions (see
+    - :octicons-tag-24: Availalbe versions: current version and older versions (see
       [Hunter package](https://hunter.readthedocs.io/en/latest/packages/pkg/nlohmann_json.html))
     - :octicons-rocket-24: The package is updated with every release.
     - :octicons-file-24: File issues at the [Hunter issue tracker](https://github.com/cpp-pm/hunter/issues)
@@ -342,7 +342,7 @@ Please see the Hunter project for any issues regarding the packaging.
     package: [**`nlohmann-json`**](https://github.com/Microsoft/vcpkg/tree/master/ports/nlohmann-json)
 
     - [![Vcpkg package](https://repology.org/badge/version-for-repo/vcpkg/nlohmann-json.svg)](https://repology.org/project/nlohmann-json/versions)
-    - :octicons-tag-24: Available versions: current version
+    - :octicons-tag-24: Availalbe versions: current version
     - :octicons-rocket-24: The package is updated with every release.
     - :octicons-file-24: File issues at the [vcpkg issue tracker](https://github.com/microsoft/vcpkg/issues)
     - :octicons-question-24: [vcpkg website](https://vcpkg.io/)
@@ -387,7 +387,7 @@ and follow the then displayed descriptions. Please see the vcpkg project for any
 
     package: [**`nlohmann/json`**](https://github.com/pfultz2/cget-recipes/blob/master/recipes/nlohmann/json/package.txt)
 
-    - :octicons-tag-24: Available versions: current version and older versions
+    - :octicons-tag-24: Availalbe versions: current version and older versions
     - :octicons-rocket-24: The package is updated with every release.
     - :octicons-file-24: File issues at the [cget issue tracker](https://github.com/pfultz2/cget-recipes/issues)
     - :octicons-question-24: [cget website](https://cget.readthedocs.io/)
@@ -438,7 +438,7 @@ installed by adding the `-DJSON_MultipleHeaders=ON` flag (i.e., `cget install nl
 
     package: **`nlohmann/json`**
 
-    - :octicons-tag-24: Available versions: current version and older versions
+    - :octicons-tag-24: Availalbe versions: current version and older versions
     - :octicons-rocket-24: The package is updated with every release.
     - :octicons-file-24: File issues at the [library issue tracker](https://github.com/nlohmann/json/issues)
     - :octicons-question-24: [Xcode documentation](https://developer.apple.com/documentation/xcode/adding-package-dependencies-to-your-app)
@@ -449,7 +449,7 @@ installed by adding the `-DJSON_MultipleHeaders=ON` flag (i.e., `cget install nl
 
     package: [**`nlohmann.json`**](https://www.nuget.org/packages/nlohmann.json/)
 
-    - :octicons-tag-24: Available versions: current and previous versions
+    - :octicons-tag-24: Availalbe versions: current and previous versions
     - :octicons-rocket-24: The package is updated with every release.
     - :octicons-person-24: Maintainer: [Hani Kaabi](https://github.com/hnkb)
     - :octicons-file-24: File issues at the [maintainer's issue tracker](https://github.com/hnkb/nlohmann-json-nuget/issues)
@@ -583,7 +583,7 @@ more information.
     package: [**`nlohmann_json`**](https://anaconda.org/conda-forge/nlohmann_json)
 
     - ![](https://img.shields.io/conda/v/conda-forge/nlohmann_json)
-    - :octicons-tag-24: Available versions: current and previous versions
+    - :octicons-tag-24: Availalbe versions: current and previous versions
     - :octicons-rocket-24: The package is updated with every release.
     - :octicons-file-24: File issues at the [feedstock's issue tracker](https://github.com/conda-forge/nlohmann_json-feedstock/issues)
     - :octicons-question-24: [Conda documentation](https://docs.conda.io/projects/conda/en/stable/user-guide/getting-started.html)
@@ -640,7 +640,7 @@ If you are using [MSYS2](http://www.msys2.org/), you can use the [mingw-w64-nloh
     port: [**`nlohmann-json`**](https://ports.macports.org/port/nlohmann-json/)
 
     - [![MacPorts package](https://repology.org/badge/version-for-repo/macports/nlohmann-json.svg)](https://repology.org/project/nlohmann-json/versions)
-    - :octicons-tag-24: Available versions: current version
+    - :octicons-tag-24: Availalbe versions: current version
     - :octicons-rocket-24: The port is updated with every release.
     - :octicons-file-24: File issues at the [MacPorts issue tracker](https://trac.macports.org/newticket?port=nlohmann-json)
     - :octicons-question-24: [MacPorts website](https://www.macports.org)
@@ -718,7 +718,7 @@ bdep new -t exe -l c++
 
     package: **`gh:nlohmann/json`**
 
-    - :octicons-tag-24: Available versions: current and previous versions
+    - :octicons-tag-24: Availalbe versions: current and previous versions
     - :octicons-rocket-24: The package is updated with every release.
     - :octicons-file-24: File issues at the [CPM.cmake issue tracker](https://github.com/cpm-cmake/CPM.cmake/issues)
     - :octicons-question-24: [CPM.cmake website](https://github.com/cpm-cmake/CPM.cmake)
@@ -762,7 +762,7 @@ CPMAddPackage("gh:nlohmann/json@3.12.0")
 
     package: [**`nlohmann_json`**](https://github.com/xmake-io/xmake-repo/blob/master/packages/n/nlohmann_json/xmake.lua)
 
-    - :octicons-tag-24: Available versions: current and previous versions
+    - :octicons-tag-24: Availalbe versions: current and previous versions
     - :octicons-rocket-24: The package is updated with every release.
     - :octicons-file-24: File issues at the [xmake issue tracker](https://github.com/xmake-io/xmake-repo/issues)
     - :octicons-question-24: [xmake website](https://xmake.io/#/)

docs/mkdocs/mkdocs.yml

@@ -9,7 +9,7 @@ repo_url: https://github.com/nlohmann/json
 edit_uri: edit/develop/docs/mkdocs/docs
 
 # Copyright
-copyright: Copyright © 2013-2026 Niels Lohmann
+copyright: Copyright © 2013-2025 Niels Lohmann
 
 # Configuration
 theme:
@@ -77,7 +77,6 @@ nav:
       - features/json_pointer.md
       - features/json_patch.md
       - features/merge_patch.md
-      - features/modules.md
       - 'nlohmann Namespace': features/namespace.md
       - features/object_order.md
       - Parsing:
@@ -322,7 +321,6 @@ markdown_extensions:
       guess_lang: false
   - toc:
       permalink: true
-  - md_in_html
   - pymdownx.arithmatex
   - pymdownx.betterem:
       smart_enable: all

docs/mkdocs/requirements.txt

@@ -1,11 +1,11 @@
-wheel==0.46.3
+wheel==0.45.1
 
 mkdocs==1.6.1                                       # documentation framework
-mkdocs-git-revision-date-localized-plugin==1.5.1    # plugin "git-revision-date-localized"
+mkdocs-git-revision-date-localized-plugin==1.4.5    # plugin "git-revision-date-localized"
-mkdocs-material==9.7.1                             # theme for mkdocs
+mkdocs-material==9.6.14                             # theme for mkdocs
 mkdocs-material-extensions==1.3.1                   # extensions
 mkdocs-minify-plugin==0.8.0                         # plugin "minify"
 mkdocs-redirects==1.2.2                             # plugin "redirects"
-mkdocs-htmlproofer-plugin==1.4.1                    # plugin "htmlproofer"
+mkdocs-htmlproofer-plugin==1.3.0                    # plugin "htmlproofer"
 
-PyYAML==6.0.3                                       # linter
+PyYAML==6.0.2                                       # linter

include/nlohmann/adl_serializer.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once

include/nlohmann/byte_container_with_subtype.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once

include/nlohmann/detail/abi_macros.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once

include/nlohmann/detail/conversions/from_json.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once
@@ -26,7 +26,6 @@
 #include <nlohmann/detail/meta/identity_tag.hpp>
 #include <nlohmann/detail/meta/std_fs.hpp>
 #include <nlohmann/detail/meta/type_traits.hpp>
-#include <nlohmann/detail/meta/logic.hpp>
 #include <nlohmann/detail/string_concat.hpp>
 #include <nlohmann/detail/value_t.hpp>
 
@@ -54,8 +53,7 @@ inline void from_json(const BasicJsonType& j, typename std::nullptr_t& n)
 }
 
 #ifdef JSON_HAS_CPP_17
-template < typename BasicJsonType, typename T,
+template<typename BasicJsonType, typename T>
-           typename std::enable_if < !nlohmann::detail::is_basic_json<T>::value, int >::type = 0 >
 void from_json(const BasicJsonType& j, std::optional<T>& opt)
 {
     if (j.is_null())
@@ -447,36 +445,13 @@ inline void from_json(const BasicJsonType& j, ArithmeticType& val)
     }
 }
 
-template<typename BasicJsonType, typename Type>
+template<typename BasicJsonType, typename... Args, std::size_t... Idx>
-detail::uncvref_t<Type> from_json_tuple_get_impl(BasicJsonType&& j, detail::identity_tag<Type> /*unused*/, detail::priority_tag<0> /*unused*/)
+std::tuple<Args...> from_json_tuple_impl_base(BasicJsonType&& j, index_sequence<Idx...> /*unused*/)
 {
-    return std::forward<BasicJsonType>(j).template get<detail::uncvref_t<Type>>();
+    return std::make_tuple(std::forward<BasicJsonType>(j).at(Idx).template get<Args>()...);
 }
 
-template<typename BasicJsonType, typename Type,
+template<typename BasicJsonType>
-         detail::enable_if_t<detail::is_compatible_reference_type<BasicJsonType, Type>::value, int> = 0>
-Type from_json_tuple_get_impl(BasicJsonType && j, detail::identity_tag<Type> /*unused*/, detail::priority_tag<1> /*unused*/)
-{
-    return std::forward<BasicJsonType>(j).template get_ref<Type>();
-}
-
-template<typename BasicJsonType, typename Type,
-         detail::enable_if_t<std::is_arithmetic<uncvref_t<Type>>::value, int> = 0>
-detail::uncvref_t<Type> from_json_tuple_get_impl(BasicJsonType && j, detail::identity_tag<Type> /*unused*/, detail::priority_tag<2> /*unused*/)
-{
-    return std::forward<BasicJsonType>(j).template get<detail::uncvref_t<Type>>();
-}
-
-template<std::size_t PTagValue, typename BasicJsonType, typename... Types>
-using tuple_type = std::tuple < decltype(from_json_tuple_get_impl(std::declval<BasicJsonType>(), detail::identity_tag<Types> {}, detail::priority_tag<PTagValue> {}))... >;
-
-template<std::size_t PTagValue, typename... Args, typename BasicJsonType, std::size_t... Idx>
-tuple_type<PTagValue, BasicJsonType, Args...> from_json_tuple_impl_base(BasicJsonType&& j, index_sequence<Idx...> /*unused*/)
-{
-    return tuple_type<PTagValue, BasicJsonType, Args...>(from_json_tuple_get_impl(std::forward<BasicJsonType>(j).at(Idx), detail::identity_tag<Args> {}, detail::priority_tag<PTagValue> {})...);
-}
-
-template<std::size_t PTagValue, typename BasicJsonType>
 std::tuple<> from_json_tuple_impl_base(BasicJsonType& /*unused*/, index_sequence<> /*unused*/)
 {
     return {};
@@ -498,15 +473,13 @@ inline void from_json_tuple_impl(BasicJsonType&& j, std::pair<A1, A2>& p, priori
 template<typename BasicJsonType, typename... Args>
 std::tuple<Args...> from_json_tuple_impl(BasicJsonType&& j, identity_tag<std::tuple<Args...>> /*unused*/, priority_tag<2> /*unused*/)
 {
-    static_assert(cxpr_and<cxpr_or<cxpr_not<std::is_reference<Args>>, is_compatible_reference_type<BasicJsonType, Args>>...>::value,
+    return from_json_tuple_impl_base<BasicJsonType, Args...>(std::forward<BasicJsonType>(j), index_sequence_for<Args...> {});
-                  "Can not return a tuple containing references to types not contained in a Json, try Json::get_to()");
-    return from_json_tuple_impl_base<1, Args...>(std::forward<BasicJsonType>(j), index_sequence_for<Args...> {});
 }
 
 template<typename BasicJsonType, typename... Args>
 inline void from_json_tuple_impl(BasicJsonType&& j, std::tuple<Args...>& t, priority_tag<3> /*unused*/)
 {
-    t = from_json_tuple_impl_base<2, Args...>(std::forward<BasicJsonType>(j), index_sequence_for<Args...> {});
+    t = from_json_tuple_impl_base<BasicJsonType, Args...>(std::forward<BasicJsonType>(j), index_sequence_for<Args...> {});
 }
 
 template<typename BasicJsonType, typename TupleRelated>

include/nlohmann/detail/conversions/to_chars.hpp

@@ -4,7 +4,7 @@
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
 // SPDX-FileCopyrightText: 2009 Florian Loitsch <https://florian.loitsch.com/>
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once

include/nlohmann/detail/conversions/to_json.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once

include/nlohmann/detail/exceptions.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once

include/nlohmann/detail/hash.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once

include/nlohmann/detail/input/binary_reader.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once
@@ -425,25 +425,6 @@ class binary_reader
 
     @return whether a valid CBOR value was passed to the SAX parser
     */
-
-    template<typename NumberType>
-    bool get_cbor_negative_integer()
-    {
-        NumberType number{};
-        if (JSON_HEDLEY_UNLIKELY(!get_number(input_format_t::cbor, number)))
-        {
-            return false;
-        }
-        const auto max_val = static_cast<NumberType>((std::numeric_limits<number_integer_t>::max)());
-        if (number > max_val)
-        {
-            return sax->parse_error(chars_read, get_token_string(),
-                                    parse_error::create(112, chars_read,
-                                            exception_message(input_format_t::cbor, "negative integer overflow", "value"), nullptr));
-        }
-        return sax->number_integer(static_cast<number_integer_t>(-1) - static_cast<number_integer_t>(number));
-    }
-
     bool parse_cbor_internal(const bool get_char,
                              const cbor_tag_handler_t tag_handler)
     {
@@ -532,16 +513,29 @@ class binary_reader
                 return sax->number_integer(static_cast<std::int8_t>(0x20 - 1 - current));
 
             case 0x38: // Negative integer (one-byte uint8_t follows)
-                return get_cbor_negative_integer<std::uint8_t>();
+            {
+                std::uint8_t number{};
+                return get_number(input_format_t::cbor, number) && sax->number_integer(static_cast<number_integer_t>(-1) - number);
+            }
 
             case 0x39: // Negative integer -1-n (two-byte uint16_t follows)
-                return get_cbor_negative_integer<std::uint16_t>();
+            {
+                std::uint16_t number{};
+                return get_number(input_format_t::cbor, number) && sax->number_integer(static_cast<number_integer_t>(-1) - number);
+            }
 
             case 0x3A: // Negative integer -1-n (four-byte uint32_t follows)
-                return get_cbor_negative_integer<std::uint32_t>();
+            {
+                std::uint32_t number{};
+                return get_number(input_format_t::cbor, number) && sax->number_integer(static_cast<number_integer_t>(-1) - number);
+            }
 
             case 0x3B: // Negative integer -1-n (eight-byte uint64_t follows)
-                return get_cbor_negative_integer<std::uint64_t>();
+            {
+                std::uint64_t number{};
+                return get_number(input_format_t::cbor, number) && sax->number_integer(static_cast<number_integer_t>(-1)
+                        - static_cast<number_integer_t>(number));
+            }
 
             // Binary data (0x00..0x17 bytes follow)
             case 0x40:
@@ -2950,7 +2944,7 @@ class binary_reader
                 success = false;
                 break;
             }
-            result.push_back(static_cast<typename binary_t::value_type>(current));
+            result.push_back(static_cast<std::uint8_t>(current));
         }
         return success;
     }

include/nlohmann/detail/input/input_adapters.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once
@@ -14,7 +14,6 @@
 #include <iterator> // begin, end, iterator_traits, random_access_iterator_tag, distance, next
 #include <memory> // shared_ptr, make_shared, addressof
 #include <numeric> // accumulate
-#include <streambuf> // streambuf
 #include <string> // string, char_traits
 #include <type_traits> // enable_if, is_base_of, is_pointer, is_integral, remove_pointer
 #include <utility> // pair, declval
@@ -402,7 +401,7 @@ template<typename T>
 struct is_iterator_of_multibyte
 {
     using value_type = typename std::iterator_traits<T>::value_type;
-    enum // NOLINT(cppcoreguidelines-use-enum-class)
+    enum
     {
         value = sizeof(value_type) > 1
     };

include/nlohmann/detail/input/json_sax.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once

include/nlohmann/detail/input/lexer.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once
@@ -863,8 +863,6 @@ class lexer : public lexer_base<BasicJsonType>
                             break;
                     }
                 }
-
-                JSON_HEDLEY_UNREACHABLE();
             }
 
             // multi-line comments skip input until */ is read
@@ -900,8 +898,6 @@ class lexer : public lexer_base<BasicJsonType>
                             continue;
                     }
                 }
-
-                JSON_HEDLEY_UNREACHABLE();
             }
 
             // unexpected character after reading '/'

include/nlohmann/detail/input/parser.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once

include/nlohmann/detail/input/position_t.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once

include/nlohmann/detail/iterators/internal_iterator.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once

include/nlohmann/detail/iterators/iter_impl.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once

include/nlohmann/detail/iterators/iteration_proxy.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once

include/nlohmann/detail/iterators/iterator_traits.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once

include/nlohmann/detail/iterators/json_reverse_iterator.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once

include/nlohmann/detail/iterators/primitive_iterator.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once

include/nlohmann/detail/json_custom_base_class.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once

include/nlohmann/detail/json_pointer.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once

include/nlohmann/detail/json_ref.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once

include/nlohmann/detail/macro_scope.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once

include/nlohmann/detail/macro_unscope.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once

include/nlohmann/detail/meta/call_std/begin.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once

include/nlohmann/detail/meta/call_std/end.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once

include/nlohmann/detail/meta/cpp_future.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-FileCopyrightText: 2018 The Abseil Authors
 // SPDX-License-Identifier: MIT
 

include/nlohmann/detail/meta/detected.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once