⬆️ Bump github/codeql-action from 4.32.3 to 4.32.4

Bumps [github/codeql-action](https://github.com/github/codeql-action) from 4.32.3 to 4.32.4.
- [Release notes](https://github.com/github/codeql-action/releases)
- [Changelog](https://github.com/github/codeql-action/blob/main/CHANGELOG.md)
- [Commits](9e907b5e64...89a39a4e59)

---
updated-dependencies:
- dependency-name: github/codeql-action
  dependency-version: 4.32.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/ISSUE_TEMPLATE/bug.yaml

@@ -14,6 +14,8 @@ 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@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
         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@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
+      - uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
         with:
           name: pr
           path: pr/
@@ -34,18 +34,18 @@ jobs:
 
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
         with:
           egress-policy: audit
 
       - name: Checkout pull request
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           path: main
           ref: ${{ github.event.pull_request.head.sha }}
 
       - name: Checkout tools
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           path: tools
           ref: develop

.github/workflows/cifuzz.yml

@@ -6,29 +6,29 @@ permissions:
 
 jobs:
   Fuzzing:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
     - name: Harden Runner
-      uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+      uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
       with:
         egress-policy: audit
 
     - name: Build Fuzzers
       id: build
-      uses: google/oss-fuzz/infra/cifuzz/actions/build_fuzzers@57fe4475324c5506adbfecdcdd2917f65c86ee9e # master
+      uses: google/oss-fuzz/infra/cifuzz/actions/build_fuzzers@master
       with:
         oss-fuzz-project-name: 'json'
         dry-run: false
         language: c++
     - name: Run Fuzzers
-      uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@57fe4475324c5506adbfecdcdd2917f65c86ee9e # master
+      uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@master
       with:
         oss-fuzz-project-name: 'json'
         fuzz-seconds: 300
         dry-run: false
         language: c++
     - name: Upload Crash
-      uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
+      uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
       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@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+      uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
       with:
         egress-policy: audit
 
     - name: Checkout repository
-      uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@303c0aef88fc2fe5ff6d63d3b1596bfd83dfa1f9 # v3.30.4
+      uses: github/codeql-action/init@89a39a4e59826350b863aa6b6252a07ad50cf83e # v4.32.4
       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@303c0aef88fc2fe5ff6d63d3b1596bfd83dfa1f9 # v3.30.4
+      uses: github/codeql-action/autobuild@89a39a4e59826350b863aa6b6252a07ad50cf83e # v4.32.4
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@303c0aef88fc2fe5ff6d63d3b1596bfd83dfa1f9 # v3.30.4
+      uses: github/codeql-action/analyze@89a39a4e59826350b863aa6b6252a07ad50cf83e # v4.32.4

.github/workflows/comment_check_amalgamation.yml

@@ -19,7 +19,7 @@ jobs:
       pull-requests: write
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
         with:
           egress-policy: audit
 

.github/workflows/dependency-review.yml

@@ -17,11 +17,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
         with:
           egress-policy: audit
 
       - name: 'Checkout Repository'
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: 'Dependency Review'
-        uses: actions/dependency-review-action@595b5aeba73380359d98a5e087f648dbb0edce1b # v4.7.3
+        uses: actions/dependency-review-action@3c4e3dcb1aa7874d2c16be7d79418e9b7efd6261 # v4.8.2

.github/workflows/flawfinder.yml

@@ -0,0 +1,46 @@
+# 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@89a39a4e59826350b863aa6b6252a07ad50cf83e # 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@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
         with:
           egress-policy: audit
 
-      - uses: srvaroa/labeler@b4493338d7929ddc4ffc95fadf6f28c73bae2e90 # master
+      - uses: srvaroa/labeler@471cdb892ebac76de6cb869105a2017fa3b9b9b3 # master
         env:
           GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"

.github/workflows/macos.yml

@@ -27,7 +27,7 @@ jobs:
 #      DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode }}.app/Contents/Developer
 #
 #    steps:
-#      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+#      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 #      - name: Run CMake
 #        run: cmake -S . -B build -D CMAKE_BUILD_TYPE=Debug -DJSON_BuildTests=On -DJSON_FastTests=ON
 #      - name: Build
@@ -45,7 +45,7 @@ jobs:
 #      DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode }}.app/Contents/Developer
 #
 #    steps:
-#      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+#      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 #      - name: Run CMake
 #        run: cmake -S . -B build -D CMAKE_BUILD_TYPE=Debug -DJSON_BuildTests=On -DJSON_FastTests=ON
 #      - name: Build
@@ -63,7 +63,7 @@ jobs:
 #      DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode }}.app/Contents/Developer
 #
 #    steps:
-#      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+#      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 #      - name: Run CMake
 #        run: cmake -S . -B build -D CMAKE_BUILD_TYPE=Debug -DJSON_BuildTests=On -DJSON_FastTests=ON
 #      - name: Build
@@ -80,7 +80,7 @@ jobs:
       DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode }}.app/Contents/Developer
 
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Run CMake
         run: cmake -S . -B build -D CMAKE_BUILD_TYPE=Debug -DJSON_BuildTests=On -DJSON_FastTests=ON
       - name: Build
@@ -97,7 +97,7 @@ jobs:
       DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode }}.app/Contents/Developer
 
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Run CMake
         run: cmake -S . -B build -D CMAKE_BUILD_TYPE=Debug -DJSON_BuildTests=On -DJSON_FastTests=ON
       - name: Build
@@ -112,7 +112,7 @@ jobs:
         standard: [11, 14, 17, 20, 23, 26]
 
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - 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@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
         with:
           egress-policy: audit
 
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - 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@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
         with:
           egress-policy: audit
 
       - name: "Checkout code"
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
 
       - name: "Run analysis"
-        uses: ossf/scorecard-action@05b42c624433fc40578a4040d5cf5e36ddca8cde # v2.4.2
+        uses: ossf/scorecard-action@4eaacf0543bb3f2c246792bd56e8cdeffafb205a # v2.4.3
         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@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
         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@303c0aef88fc2fe5ff6d63d3b1596bfd83dfa1f9 # v3.30.4
+        uses: github/codeql-action/upload-sarif@89a39a4e59826350b863aa6b6252a07ad50cf83e # v4.32.4
         with:
           sarif_file: results.sarif

.github/workflows/semgrep.yml

@@ -0,0 +1,54 @@
+# 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@89a39a4e59826350b863aa6b6252a07ad50cf83e # 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@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
         with:
           egress-policy: audit
 
-      - uses: actions/stale@3a9db7e6a41a89f618792c92c0e97cc736e1b13f # v10.0.0
+      - uses: actions/stale@997185467fa4f803885201cee163a9f38240193d # v10.1.1
         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@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@2ecc21724e5215b0e567bc399a2602d2ecb48541 # v4.02
+        uses: lukka/get-cmake@dc05ee1ee5ba69770230c73a6a4e947595745cab # v4.2.2
       - 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@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - 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@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
         with:
           egress-policy: audit
 
       - name: Install Valgrind
         run: sudo apt-get update ; sudo apt-get install -y valgrind
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@2ecc21724e5215b0e567bc399a2602d2ecb48541 # v4.02
+        uses: lukka/get-cmake@dc05ee1ee5ba69770230c73a6a4e947595745cab # v4.2.2
       - 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@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@2ecc21724e5215b0e567bc399a2602d2ecb48541 # v4.02
+        uses: lukka/get-cmake@dc05ee1ee5ba69770230c73a6a4e947595745cab # v4.2.2
       - 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@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@2ecc21724e5215b0e567bc399a2602d2ecb48541 # v4.02
+        uses: lukka/get-cmake@dc05ee1ee5ba69770230c73a6a4e947595745cab # v4.2.2
       - 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@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
         with:
           egress-policy: audit
 
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Install dependencies and de_DE locale
         run: |
           sudo apt-get clean
@@ -115,12 +115,12 @@ jobs:
       - name: Build
         run: cmake --build build --target ci_test_coverage
       - name: Archive coverage report
-        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
         with:
           name: code-coverage-report
           path: ${{ github.workspace }}/build/html
       - name: Publish report to Coveralls
-        uses: coverallsapp/github-action@648a8eb78e6d50909eff900e4ec85cab4524a45b # v2.3.6
+        uses: coverallsapp/github-action@5cbfd81b66ca5d10c19b062c04de0199c215fb6e # v2.3.7
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           path-to-lcov: ${{ github.workspace }}/build/json.info.filtered.noexcept
@@ -133,7 +133,7 @@ jobs:
         compiler: ['4.8', '4.9', '5', '6']
     container: ghcr.io/nlohmann/json-ci:v2.4.0
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Run CMake
         run: CXX=g++-${{ matrix.compiler }} cmake -S . -B build -DJSON_CI=On
       - name: Build
@@ -147,9 +147,9 @@ jobs:
         compiler: ['7', '8', '9', '10', '11', '12', '13', '14', '15', 'latest']
     container: gcc:${{ matrix.compiler }}
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@2ecc21724e5215b0e567bc399a2602d2ecb48541 # v4.02
+        uses: lukka/get-cmake@dc05ee1ee5ba69770230c73a6a4e947595745cab # v4.2.2
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build
@@ -162,9 +162,9 @@ jobs:
         compiler: ['3.4', '3.5', '3.6', '3.7', '3.8', '3.9', '4', '5', '6', '7', '8', '9', '10', '11', '12', '13', '14', '15-bullseye', '16', '17', '18', '19', '20', 'latest']
     container: silkeh/clang:${{ matrix.compiler }}
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@2ecc21724e5215b0e567bc399a2602d2ecb48541 # v4.02
+        uses: lukka/get-cmake@dc05ee1ee5ba69770230c73a6a4e947595745cab # v4.2.2
       - 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 +180,9 @@ jobs:
       matrix:
         standard: [11, 14, 17, 20, 23, 26]
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@2ecc21724e5215b0e567bc399a2602d2ecb48541 # v4.02
+        uses: lukka/get-cmake@dc05ee1ee5ba69770230c73a6a4e947595745cab # v4.2.2
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build
@@ -198,9 +198,9 @@ jobs:
     steps:
       - name: Install git and unzip
         run: apt-get update ; apt-get install -y git unzip
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@2ecc21724e5215b0e567bc399a2602d2ecb48541 # v4.02
+        uses: lukka/get-cmake@dc05ee1ee5ba69770230c73a6a4e947595745cab # v4.2.2
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build with libc++
@@ -214,7 +214,7 @@ jobs:
     runs-on: ubuntu-latest
     container: ghcr.io/nlohmann/json-ci:v2.4.0
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build
@@ -227,9 +227,9 @@ jobs:
     runs-on: ubuntu-latest
     container: ${{ matrix.container }}
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@2ecc21724e5215b0e567bc399a2602d2ecb48541 # v4.02
+        uses: lukka/get-cmake@dc05ee1ee5ba69770230c73a6a4e947595745cab # v4.2.2
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build
@@ -239,7 +239,7 @@ jobs:
     runs-on: ubuntu-latest
     container: ghcr.io/nlohmann/json-ci:v2.2.0
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build
@@ -251,15 +251,15 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
         with:
           egress-policy: audit
 
       - name: Install emscripten
-        uses: mymindstorm/setup-emsdk@v14
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        uses: mymindstorm/setup-emsdk@6ab9eb1bda2574c4ddb79809fc9247783eaf9021 # v14
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@2ecc21724e5215b0e567bc399a2602d2ecb48541 # v4.02
+        uses: lukka/get-cmake@dc05ee1ee5ba69770230c73a6a4e947595745cab # v4.2.2
       - name: Run CMake
         run: cmake -S . -B build -DCMAKE_TOOLCHAIN_FILE=$EMSDK/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake -GNinja
       - name: Build
@@ -272,11 +272,11 @@ jobs:
         target: [ci_test_examples, ci_test_build_documentation]
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
         with:
           egress-policy: audit
 
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build

.github/workflows/windows.yml

@@ -24,9 +24,9 @@ jobs:
         architecture: [x64, x86]
 
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Set up MinGW
-        uses: egor-tensin/setup-mingw@84c781b557efd538dec66bde06988d81cd3138cf # v2.2.0
+        uses: egor-tensin/setup-mingw@41b837e47d7f85214629d255b9c4bc3fcbe9fd63 # v3.0
         with:
           platform: ${{ matrix.architecture }}
           version: 12.2.0 # https://github.com/egor-tensin/setup-mingw/issues/14
@@ -47,7 +47,7 @@ jobs:
     runs-on: windows-2022
 
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Set extra CXX_FLAGS for latest std_version
         id: cxxflags
         run: |
@@ -77,11 +77,11 @@ jobs:
         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]
 
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - 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"
       - name: Set up MinGW
-        uses: egor-tensin/setup-mingw@84c781b557efd538dec66bde06988d81cd3138cf # v2.2.0
+        uses: egor-tensin/setup-mingw@41b837e47d7f85214629d255b9c4bc3fcbe9fd63 # v3.0
         with:
           platform: x64
           version: 12.2.0 # https://github.com/egor-tensin/setup-mingw/issues/14
@@ -105,10 +105,20 @@ jobs:
         architecture: [Win32, x64]
 
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Run CMake
         run: cmake -S . -B build -G "Visual Studio 17 2022" -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: 2013-2025 Niels Lohmann <https://nlohmann.me>
+Copyright: 2013-2026 Niels Lohmann <https://nlohmann.me>
 License: MIT
 
 Files: include/nlohmann/thirdparty/hedley.hpp

LICENSE.MIT

@@ -1,6 +1,6 @@
 MIT License 
 
-Copyright (c) 2013-2025 Niels Lohmann
+Copyright (c) 2013-2026 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

@@ -0,0 +1,121 @@
+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
+of later claims of infringement build upon, modify, incorporate in other
+works, reuse and redistribute as freely as possible in any form whatsoever
+and for any purposes, including without limitation commercial purposes.
+These owners may contribute to the Commons to promote the ideal of a free
+culture and the further production of creative, cultural and scientific
+works, or to gain reputation or greater distribution for their Work in
+part through the use and efforts of others.
+
+For these and/or other purposes and motivations, and without any
+expectation of additional consideration or compensation, the person
+associating CC0 with a Work (the "Affirmer"), to the extent that he or she
+is an owner of Copyright and Related Rights in the Work, voluntarily
+elects to apply CC0 to the Work and publicly distribute the Work under its
+terms, with knowledge of his or her Copyright and Related Rights in the
+Work and the meaning and intended legal effect of CC0 on those rights.
+
+1. Copyright and Related Rights. A Work made available under CC0 may be
+protected by copyright and related or neighboring rights ("Copyright and
+Related Rights"). Copyright and Related Rights include, but are not
+limited to, the following:
+
+  i. the right to reproduce, adapt, distribute, perform, display,
+     communicate, and translate a Work;
+ ii. moral rights retained by the original author(s) and/or performer(s);
+iii. publicity and privacy rights pertaining to a person's image or
+     likeness depicted in a Work;
+ iv. rights protecting against unfair competition in regards to a Work,
+     subject to the limitations in paragraph 4(a), below;
+  v. rights protecting the extraction, dissemination, use and reuse of data
+     in a Work;
+ vi. database rights (such as those arising under Directive 96/9/EC of the
+     European Parliament and of the Council of 11 March 1996 on the legal
+     protection of databases, and under any national implementation
+     thereof, including any amended or successor version of such
+     directive); and
+vii. other similar, equivalent or corresponding rights throughout the
+     world based on applicable law or treaty, and any national
+     implementations thereof.
+
+2. Waiver. To the greatest extent permitted by, but not in contravention
+of, applicable law, Affirmer hereby overtly, fully, permanently,
+irrevocably and unconditionally waives, abandons, and surrenders all of
+Affirmer's Copyright and Related Rights and associated claims and causes
+of action, whether now known or unknown (including existing as well as
+future claims and causes of action), in the Work (i) in all territories
+worldwide, (ii) for the maximum duration provided by applicable law or
+treaty (including future time extensions), (iii) in any current or future
+medium and for any number of copies, and (iv) for any purpose whatsoever,
+including without limitation commercial, advertising or promotional
+purposes (the "Waiver"). Affirmer makes the Waiver for the benefit of each
+member of the public at large and to the detriment of Affirmer's heirs and
+successors, fully intending that such Waiver shall not be subject to
+revocation, rescission, cancellation, termination, or any other legal or
+equitable action to disrupt the quiet enjoyment of the Work by the public
+as contemplated by Affirmer's express Statement of Purpose.
+
+3. Public License Fallback. Should any part of the Waiver for any reason
+be judged legally invalid or ineffective under applicable law, then the
+Waiver shall be preserved to the maximum extent permitted taking into
+account Affirmer's express Statement of Purpose. In addition, to the
+extent the Waiver is so judged Affirmer hereby grants to each affected
+person a royalty-free, non transferable, non sublicensable, non exclusive,
+irrevocable and unconditional license to exercise Affirmer's Copyright and
+Related Rights in the Work (i) in all territories worldwide, (ii) for the
+maximum duration provided by applicable law or treaty (including future
+time extensions), (iii) in any current or future medium and for any number
+of copies, and (iv) for any purpose whatsoever, including without
+limitation commercial, advertising or promotional purposes (the
+"License"). The License shall be deemed effective as of the date CC0 was
+applied by Affirmer to the Work. Should any part of the License for any
+reason be judged legally invalid or ineffective under applicable law, such
+partial invalidity or ineffectiveness shall not invalidate the remainder
+of the License, and in such case Affirmer hereby affirms that he or she
+will not (i) exercise any of his or her remaining Copyright and Related
+Rights in the Work or (ii) assert any associated claims and causes of
+action with respect to the Work, in either case contrary to Affirmer's
+express Statement of Purpose.
+
+4. Limitations and Disclaimers.
+
+ a. No trademark or patent rights held by Affirmer are waived, abandoned,
+    surrendered, licensed or otherwise affected by this document.
+ b. Affirmer offers the Work as-is and makes no representations or
+    warranties of any kind concerning the Work, express, implied,
+    statutory or otherwise, including without limitation warranties of
+    title, merchantability, fitness for a particular purpose, non
+    infringement, or the absence of latent or other defects, accuracy, or
+    the present or absence of errors, whether or not discoverable, all to
+    the greatest extent permissible under applicable law.
+ c. Affirmer disclaims responsibility for clearing rights of other persons
+    that may apply to the Work or any use thereof, including without
+    limitation any person's Copyright and Related Rights in the Work.
+    Further, Affirmer disclaims responsibility for obtaining any necessary
+    consents, permissions or other rights required for any use of the
+    Work.
+ d. Affirmer understands and acknowledges that Creative Commons is not a
+    party to this document and has no duty or obligation with respect to
+    this CC0 or use of the Work.

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 "2013-2025" --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 annotate --recursive single_include include -tjson --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 "2013-2026" --merge-copyrights
 	pipx run reuse lint
 
 spdx:

README.md

@@ -80,6 +80,7 @@ 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
 
@@ -345,7 +346,7 @@ Note the difference between serialization and assignment:
 json j_string = "this is a string";
 
 // retrieve the string value
-auto cpp_string = j_string.template get<std::string>();
+auto cpp_string = j_string.get<std::string>();
 // retrieve the string value (alternative when a variable already exists)
 std::string cpp_string2;
 j_string.get_to(cpp_string2);
@@ -354,7 +355,7 @@ 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.template get<std::string>() << '\n';
+std::cout << cpp_string << " == " << cpp_string2 << " == " << j_string.get<std::string>() << '\n';
 // output of serialized value
 std::cout << j_string << " == " << serialized_string << std::endl;
 ```
@@ -527,7 +528,7 @@ for (auto& element : j) {
 }
 
 // getter/setter
-const auto tmp = j[0].template get<std::string>();
+const auto tmp = j[0].get<std::string>();
 j[1] = 42;
 bool foo = j.at(2);
 
@@ -734,7 +735,7 @@ You can switch off implicit conversions by defining `JSON_USE_IMPLICIT_CONVERSIO
 // strings
 std::string s1 = "Hello, world!";
 json js = s1;
-auto s2 = js.template get<std::string>();
+auto s2 = js.get<std::string>();
 // NOT RECOMMENDED
 std::string s3 = js;
 std::string s4;
@@ -743,7 +744,7 @@ s4 = js;
 // Booleans
 bool b1 = true;
 json jb = b1;
-auto b2 = jb.template get<bool>();
+auto b2 = jb.get<bool>();
 // NOT RECOMMENDED
 bool b3 = jb;
 bool b4;
@@ -752,7 +753,7 @@ b4 = jb;
 // numbers
 int i = 42;
 json jn = i;
-auto f = jn.template get<double>();
+auto f = jn.get<double>();
 // NOT RECOMMENDED
 double f2 = jb;
 double f3;
@@ -795,9 +796,9 @@ j["age"] = p.age;
 
 // convert from JSON: copy each value from the JSON object
 ns::person p {
-    j["name"].template get<std::string>(),
-    j["address"].template get<std::string>(),
-    j["age"].template get<int>()
+    j["name"].get<std::string>(),
+    j["address"].get<std::string>(),
+    j["age"].get<int>()
 };
 ```
 
@@ -814,7 +815,7 @@ std::cout << j << std::endl;
 // {"address":"744 Evergreen Terrace","age":60,"name":"Ned Flanders"}
 
 // conversion: json -> person
-auto p2 = j.template get<ns::person>();
+auto p2 = j.get<ns::person>();
 
 // that's it
 assert(p == p2);
@@ -841,13 +842,13 @@ 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 `template get<your_type>()` or `get_to(your_type&)`, the `from_json` method will be called.
+Likewise, when calling `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 `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.)
+- 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.)
 - 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.
 
@@ -927,8 +928,8 @@ namespace nlohmann {
             if (j.is_null()) {
                 opt = boost::none;
             } else {
-                opt = j.template get<T>(); // same as above, but with
-                                           // adl_serializer<T>::from_json
+                opt = j.get<T>(); // same as above, but with
+                                  // adl_serializer<T>::from_json
             }
         }
     };
@@ -955,7 +956,7 @@ 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.template get<int>()};
+            return {j.get<int>()};
         }
 
         // Here's the catch! You must provide a to_json method! Otherwise, you
@@ -1019,7 +1020,7 @@ 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.template get<T>(); // oops!
+      value = j.get<T>(); // oops!
     }
 };
 ```
@@ -1059,11 +1060,11 @@ assert(j == "stopped");
 
 // json string to enum
 json j3 = "running";
-assert(j3.template get<TaskState>() == TS_RUNNING);
+assert(j3.get<TaskState>() == TS_RUNNING);
 
 // undefined json value to enum (where the first map entry above is the default)
 json jPi = 3.14;
-assert(jPi.template get<TaskState>() == TS_INVALID);
+assert(jPi.get<TaskState>() == TS_INVALID);
 ```
 
 Just as in [Arbitrary Type Conversions](#arbitrary-types-conversions) above,
@@ -1073,7 +1074,7 @@ Just as in [Arbitrary Type Conversions](#arbitrary-types-conversions) above,
 
 Other Important points:
 
-- When using `template get<ENUM_TYPE>()`, undefined JSON values will default to the first pair specified in your map. Select this default pair carefully.
+- When using `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)
@@ -1155,7 +1156,7 @@ The library is used in multiple projects, applications, operating systems, etc.
 
 ## Supported compilers
 
-Though it's 2025 already, the support for C++11 is still a bit sparse. Currently, the following compilers are known to work:
+Though it's 2026 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)
@@ -1334,7 +1335,7 @@ pkg-config nlohmann_json --cflags
 
 The class is licensed under the [MIT License](https://opensource.org/licenses/MIT):
 
-Copyright &copy; 2013-2025 [Niels Lohmann](https://nlohmann.me)
+Copyright &copy; 2013-2026 [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:
 
@@ -1865,7 +1866,7 @@ 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 test suite is not found, several test suites will fail like this:
+If the testdata is not found, several test suites will fail like this:
 
 ```
 ===============================================================================
@@ -1883,6 +1884,8 @@ 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/requirements/requirements-reuse.txt

@@ -1 +1 @@
-reuse==5.1.1
+reuse==6.2.0

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

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.template get<Choice>();
+        Choice ch = j.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.template get<Choice>();
+        Choice ch = j.get<Choice>();
     }
     ```
 
@@ -109,7 +109,7 @@ The default value is `0`.
 
     void from_json(const json& j, Choice& ch)
     {
-        auto value = j.template get<std::string>();
+        auto value = j.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.template get<std::string>();
+        auto value = j.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.template get<Choice>();
+        Choice ch = j.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.template get<std::string>();
+    auto s = j.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 [`template get<ENUM_TYPE>()`](../basic_json/get.md), undefined JSON values will default to the first specified
+    - When using [`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

@@ -2,6 +2,7 @@
 
 ```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
@@ -59,3 +60,4 @@ 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

@@ -2,6 +2,7 @@
 
 ```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`
@@ -62,3 +63,4 @@ 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/examples/from_json__default_constructible.cpp

@@ -31,7 +31,7 @@ int main()
     j["address"] = "744 Evergreen Terrace";
     j["age"] = 60;
 
-    auto p = j.template get<ns::person>();
+    auto p = j.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.template get<ns::person>();
+    auto p = j.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.template get<const json::number_integer_t*>();
-    auto p2 = value.template get<json::number_integer_t*>();
-    auto p3 = value.template get<json::number_integer_t* const>();
-    auto p4 = value.template get<const json::number_integer_t* const>();
-    auto p5 = value.template get<json::number_float_t*>();
+    auto p1 = value.get<const json::number_integer_t*>();
+    auto p2 = value.get<json::number_integer_t*>();
+    auto p3 = value.get<json::number_integer_t* const>();
+    auto p4 = value.get<const json::number_integer_t* const>();
+    auto p5 = value.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"].template get<bool>();
-    auto v2 = json_types["number"]["integer"].template get<int>();
-    auto v3 = json_types["number"]["integer"].template get<short>();
-    auto v4 = json_types["number"]["floating-point"].template get<float>();
-    auto v5 = json_types["number"]["floating-point"].template get<int>();
-    auto v6 = json_types["string"].template get<std::string>();
-    auto v7 = json_types["array"].template get<std::vector<short>>();
-    auto v8 = json_types.template get<std::unordered_map<std::string, json>>();
+    auto v1 = json_types["boolean"].get<bool>();
+    auto v2 = json_types["number"]["integer"].get<int>();
+    auto v3 = json_types["number"]["integer"].get<short>();
+    auto v4 = json_types["number"]["floating-point"].get<float>();
+    auto v5 = json_types["number"]["floating-point"].get<int>();
+    auto v6 = json_types["string"].get<std::string>();
+    auto v7 = json_types["array"].get<std::vector<short>>();
+    auto v8 = json_types.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) 2013-2025 Niels Lohmann",
+    "copyright": "(C) 2013-2026 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.template get<ns::person>();
+    auto p2 = j2.get<ns::person>();
 
     // incomplete deserialization:
     json j3 = R"({"address": "742 Evergreen Terrace", "name": "Maggie Simpson"})"_json;
     try
     {
-        auto p3 = j3.template get<ns::person>();
+        auto p3 = j3.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.template get<ns::person>();
+    auto p2 = j2.get<ns::person>();
 
     // incomplete deserialization:
     json j3 = R"({"address": "742 Evergreen Terrace", "name": "Maggie Simpson"})"_json;
     try
     {
-        auto p3 = j3.template get<ns::person>();
+        auto p3 = j3.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.template get<ns::person>();
+    auto p2 = j2.get<ns::person>();
 
     // incomplete deserialization:
     json j3 = R"({"address": "742 Evergreen Terrace", "name": "Maggie Simpson"})"_json;
-    auto p3 = j3.template get<ns::person>();
+    auto p3 = j3.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.template get<ns::person>();
+    auto p2 = j2.get<ns::person>();
 
     // incomplete deserialization:
     json j3 = R"({"address": "742 Evergreen Terrace", "name": "Maggie Simpson"})"_json;
-    auto p3 = j3.template get<ns::person>();
+    auto p3 = j3.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.template get<ns::person>();
+    auto p2 = j2.get<ns::person>();
 
     // incomplete deserialization:
     json j3 = R"({"address": "742 Evergreen Terrace", "name": "Maggie Simpson"})"_json;
     try
     {
-        auto p3 = j3.template get<ns::person>();
+        auto p3 = j3.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.template get<ns::person>();
+    auto p2 = j2.get<ns::person>();
 
     // incomplete deserialization:
     json j3 = R"({"address": "742 Evergreen Terrace", "name": "Maggie Simpson"})"_json;
     try
     {
-        auto p3 = j3.template get<ns::person>();
+        auto p3 = j3.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.template get<ns::person>();
+    auto p2 = j2.get<ns::person>();
 
     // incomplete deserialization:
     json j3 = R"({"address": "742 Evergreen Terrace", "name": "Maggie Simpson"})"_json;
-    auto p3 = j3.template get<ns::person>();
+    auto p3 = j3.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.template get<ns::person>();
+    auto p2 = j2.get<ns::person>();
 
     // incomplete deserialization:
     json j3 = R"({"address": "742 Evergreen Terrace", "name": "Maggie Simpson"})"_json;
-    auto p3 = j3.template get<ns::person>();
+    auto p3 = j3.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.template get<ns::TaskState>();
-    auto blue = j_blue.template get<ns::Color>();
+    auto running = j_running.get<ns::TaskState>();
+    auto blue = j_blue.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.template get<ns::TaskState>();
-    auto unknown = j_pi.template get<ns::Color>();
+    auto invalid = j_pi.get<ns::TaskState>();
+    auto unknown = j_pi.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.template get<ns::Color>();
-    auto red = j_red.template get<ns::Color>();
+    auto rot = j_rot.get<ns::Color>();
+    auto red = j_red.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/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"].template get<std::string>(),
-    j["address"].template get<std::string>(),
-    j["age"].template get<int>()
+    j["name"].get<std::string>(),
+    j["address"].get<std::string>(),
+    j["age"].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.template get<ns::person>();
+auto p2 = j.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 `template get<your_type>()` or `get_to(your_type&)`, the `from_json` method will be called.
+Likewise, when calling `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 `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.)
+* 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.)
 * 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.template get<T>(); // same as above, but with
+            opt = j.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.template get<int>()};
+            return {j.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 template get<T>(); // oops!
+      value = j.template get<T>(); // oops!
     }
 };
 ```

docs/mkdocs/docs/features/enum_conversion.md

@@ -36,11 +36,11 @@ assert(j == "stopped");
 
 // json string to enum
 json j3 = "running";
-assert(j3.template get<TaskState>() == TS_RUNNING);
+assert(j3.get<TaskState>() == TS_RUNNING);
 
 // undefined json value to enum (where the first map entry above is the default)
 json jPi = 3.14;
-assert(jPi.template get<TaskState>() == TS_INVALID );
+assert(jPi.get<TaskState>() == TS_INVALID );
 ```
 
 ## Notes
@@ -54,7 +54,7 @@ Just as in [Arbitrary Type Conversions](arbitrary_types.md) above,
 
 Other Important points:
 
-- When using `template get<ENUM_TYPE>()`, undefined JSON values will default to the first pair specified in your map. Select this
+- When using `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/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
-    json jd = d;                                       // stores double value 42.3
-    std::int64_t i = jd.template get<std::int64_t>();  // now i==42; no warning or error is produced
+    double d = 42.3;                          // non-integer 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
     ```
 
     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.template get<std::int64_t>();
+        std::int64_t i = jd.get<std::int64_t>();
         // ...
     }
     else

docs/mkdocs/docs/home/license.md

@@ -4,7 +4,7 @@
 
 The class is licensed under the [MIT License](https://opensource.org/licenses/MIT):
 
-Copyright © 2013-2025 [Niels Lohmann](https://nlohmann.me)
+Copyright © 2013-2026 [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/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.template get<std::string>();
+      auto s = j.get<std::string>();
       ```
 
 === "Future-proof (alternative)"

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 © 2013-2025 Niels Lohmann
+copyright: Copyright © 2013-2026 Niels Lohmann
 
 # Configuration
 theme:

docs/mkdocs/requirements.txt

@@ -1,11 +1,11 @@
-wheel==0.45.1
+wheel==0.46.3
 
 mkdocs==1.6.1                                       # documentation framework
-mkdocs-git-revision-date-localized-plugin==1.4.7    # plugin "git-revision-date-localized"
-mkdocs-material==9.6.20                             # theme for mkdocs
+mkdocs-git-revision-date-localized-plugin==1.5.1    # plugin "git-revision-date-localized"
+mkdocs-material==9.7.1                             # 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==1.3.0                    # plugin "htmlproofer"
+mkdocs-htmlproofer-plugin==1.4.1                    # plugin "htmlproofer"
 
 PyYAML==6.0.3                                       # linter

include/nlohmann/adl_serializer.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 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 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 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 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 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 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once
@@ -26,6 +26,7 @@
 #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>
 
@@ -53,7 +54,8 @@ 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())
@@ -445,13 +447,36 @@ inline void from_json(const BasicJsonType& j, ArithmeticType& val)
     }
 }
 
-template<typename BasicJsonType, typename... Args, std::size_t... Idx>
-std::tuple<Args...> from_json_tuple_impl_base(BasicJsonType&& j, index_sequence<Idx...> /*unused*/)
+template<typename BasicJsonType, typename Type>
+detail::uncvref_t<Type> from_json_tuple_get_impl(BasicJsonType&& j, detail::identity_tag<Type> /*unused*/, detail::priority_tag<0> /*unused*/)
 {
-    return std::make_tuple(std::forward<BasicJsonType>(j).at(Idx).template get<Args>()...);
+    return std::forward<BasicJsonType>(j).template get<detail::uncvref_t<Type>>();
 }
 
-template<typename BasicJsonType>
+template<typename BasicJsonType, typename Type,
+         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 {};
@@ -473,13 +498,15 @@ 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*/)
 {
-    return from_json_tuple_impl_base<BasicJsonType, Args...>(std::forward<BasicJsonType>(j), index_sequence_for<Args...> {});
+    static_assert(cxpr_and<cxpr_or<cxpr_not<std::is_reference<Args>>, is_compatible_reference_type<BasicJsonType, Args>>...>::value,
+                  "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<BasicJsonType, Args...>(std::forward<BasicJsonType>(j), index_sequence_for<Args...> {});
+    t = from_json_tuple_impl_base<2, 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 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 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 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 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 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 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 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 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 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once
@@ -425,6 +425,25 @@ 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)
     {
@@ -513,29 +532,16 @@ class binary_reader
                 return sax->number_integer(static_cast<std::int8_t>(0x20 - 1 - current));
 
             case 0x38: // Negative integer (one-byte uint8_t follows)
-            {
-                std::uint8_t number{};
-                return get_number(input_format_t::cbor, number) && sax->number_integer(static_cast<number_integer_t>(-1) - number);
-            }
+                return get_cbor_negative_integer<std::uint8_t>();
 
             case 0x39: // Negative integer -1-n (two-byte uint16_t follows)
-            {
-                std::uint16_t number{};
-                return get_number(input_format_t::cbor, number) && sax->number_integer(static_cast<number_integer_t>(-1) - number);
-            }
+                return get_cbor_negative_integer<std::uint16_t>();
 
             case 0x3A: // Negative integer -1-n (four-byte uint32_t follows)
-            {
-                std::uint32_t number{};
-                return get_number(input_format_t::cbor, number) && sax->number_integer(static_cast<number_integer_t>(-1) - number);
-            }
+                return get_cbor_negative_integer<std::uint32_t>();
 
             case 0x3B: // Negative integer -1-n (eight-byte uint64_t follows)
-            {
-                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));
-            }
+                return get_cbor_negative_integer<std::uint64_t>();
 
             // Binary data (0x00..0x17 bytes follow)
             case 0x40:

include/nlohmann/detail/input/input_adapters.hpp

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

include/nlohmann/detail/input/json_sax.hpp

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

include/nlohmann/detail/meta/identity_tag.hpp

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

include/nlohmann/detail/meta/is_sax.hpp

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

include/nlohmann/detail/meta/logic.hpp

@@ -0,0 +1,54 @@
+#pragma once
+
+#include <nlohmann/detail/macro_scope.hpp>
+
+NLOHMANN_JSON_NAMESPACE_BEGIN
+namespace detail
+{
+#ifdef JSON_HAS_CPP_17
+
+template<bool... Booleans>
+struct cxpr_or_impl : std::integral_constant < bool, (Booleans || ...) > {};
+
+template<bool... Booleans>
+struct cxpr_and_impl : std::integral_constant < bool, (Booleans &&...) > {};
+
+#else
+
+template<bool... Booleans>
+struct cxpr_or_impl : std::false_type {};
+
+template<bool... Booleans>
+struct cxpr_or_impl<true, Booleans...> : std::true_type {};
+
+template<bool... Booleans>
+struct cxpr_or_impl<false, Booleans...> : cxpr_or_impl<Booleans...> {};
+
+template<bool... Booleans>
+struct cxpr_and_impl : std::true_type {};
+
+template<bool... Booleans>
+struct cxpr_and_impl<true, Booleans...> : cxpr_and_impl<Booleans...> {};
+
+template<bool... Booleans>
+struct cxpr_and_impl<false, Booleans...> : std::false_type {};
+
+#endif
+
+template<class Boolean>
+struct cxpr_not : std::integral_constant < bool, !Boolean::value > {};
+
+template<class... Booleans>
+struct cxpr_or : cxpr_or_impl<Booleans::value...> {};
+
+template<bool... Booleans>
+struct cxpr_or_c : cxpr_or_impl<Booleans...> {};
+
+template<class... Booleans>
+struct cxpr_and : cxpr_and_impl<Booleans::value...> {};
+
+template<bool... Booleans>
+struct cxpr_and_c : cxpr_and_impl<Booleans...> {};
+
+}  // namespace detail
+NLOHMANN_JSON_NAMESPACE_END

include/nlohmann/detail/meta/std_fs.hpp

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

include/nlohmann/detail/meta/type_traits.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once
@@ -559,6 +559,28 @@ template<typename BasicJsonType, typename CompatibleType>
 struct is_compatible_type
     : is_compatible_type_impl<BasicJsonType, CompatibleType> {};
 
+template<typename BasicJsonType, typename CompatibleReferenceType>
+struct is_compatible_reference_type_impl
+{
+    using JsonType = uncvref_t<BasicJsonType>;
+    using CVType = typename std::remove_reference<CompatibleReferenceType>::type;
+    using Type = typename std::remove_cv<CVType>::type;
+    constexpr static bool value = std::is_reference<CompatibleReferenceType>::value &&
+                                  (!std::is_const<typename std::remove_reference<BasicJsonType>::type>::value || std::is_const<CVType>::value) &&
+                                  (std::is_same<typename JsonType::boolean_t, Type>::value ||
+                                   std::is_same<typename JsonType::number_float_t, Type>::value ||
+                                   std::is_same<typename JsonType::number_integer_t, Type>::value ||
+                                   std::is_same<typename JsonType::number_unsigned_t, Type>::value ||
+                                   std::is_same<typename JsonType::string_t, Type>::value ||
+                                   std::is_same<typename JsonType::binary_t, Type>::value ||
+                                   std::is_same<typename JsonType::object_t, Type>::value ||
+                                   std::is_same<typename JsonType::array_t, Type>::value);
+};
+
+template<typename BasicJsonType, typename CompatibleReferenceType>
+struct is_compatible_reference_type
+    : is_compatible_reference_type_impl<BasicJsonType, CompatibleReferenceType> {};
+
 template<typename T1, typename T2>
 struct is_constructible_tuple : std::false_type {};
 
@@ -585,14 +607,29 @@ struct is_specialization_of<Primary, Primary<Args...>> : std::true_type {};
 template<typename T>
 using is_json_pointer = is_specialization_of<::nlohmann::json_pointer, uncvref_t<T>>;
 
+// checks if B is a json_pointer<A>
+template <typename A, typename B>
+struct is_json_pointer_of : std::false_type {};
+
+template <typename A>
+struct is_json_pointer_of<A, ::nlohmann::json_pointer<A>> : std::true_type {};
+
+template <typename A>
+struct is_json_pointer_of<A, ::nlohmann::json_pointer<A>&> : std::true_type {};
+
 // checks if A and B are comparable using Compare functor
 template<typename Compare, typename A, typename B, typename = void>
 struct is_comparable : std::false_type {};
 
+// We exclude json_pointer here, because the checks using Compare(A, B) will
+// use json_pointer::operator string_t() which triggers a deprecation warning
+// for GCC. See https://github.com/nlohmann/json/issues/4621. The call to
+// is_json_pointer_of can be removed once the deprecated function has been
+// removed.
 template<typename Compare, typename A, typename B>
-struct is_comparable<Compare, A, B, void_t<
-decltype(std::declval<Compare>()(std::declval<A>(), std::declval<B>())),
-decltype(std::declval<Compare>()(std::declval<B>(), std::declval<A>()))
+struct is_comparable < Compare, A, B, enable_if_t < !is_json_pointer_of<A, B>::value
+&& std::is_constructible <decltype(std::declval<Compare>()(std::declval<A>(), std::declval<B>()))>::value
+&& std::is_constructible <decltype(std::declval<Compare>()(std::declval<B>(), std::declval<A>()))>::value
 >> : std::true_type {};
 
 template<typename T>
@@ -621,11 +658,14 @@ using is_usable_as_key_type = typename std::conditional <
 template<typename BasicJsonType, typename KeyTypeCVRef, bool RequireTransparentComparator = true,
          bool ExcludeObjectKeyType = RequireTransparentComparator, typename KeyType = uncvref_t<KeyTypeCVRef>>
 using is_usable_as_basic_json_key_type = typename std::conditional <
-    is_usable_as_key_type<typename BasicJsonType::object_comparator_t,
-    typename BasicJsonType::object_t::key_type, KeyTypeCVRef,
-    RequireTransparentComparator, ExcludeObjectKeyType>::value
-    && !is_json_iterator_of<BasicJsonType, KeyType>::value,
-    std::true_type,
+    (is_usable_as_key_type<typename BasicJsonType::object_comparator_t,
+     typename BasicJsonType::object_t::key_type, KeyTypeCVRef,
+     RequireTransparentComparator, ExcludeObjectKeyType>::value
+     && !is_json_iterator_of<BasicJsonType, KeyType>::value)
+#ifdef JSON_HAS_CPP_17
+    || std::is_convertible<KeyType, std::string_view>::value
+#endif
+    , std::true_type,
     std::false_type >::type;
 
 template<typename ObjectType, typename KeyType>

include/nlohmann/detail/meta/void_t.hpp

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

include/nlohmann/detail/output/binary_writer.hpp

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

include/nlohmann/detail/output/output_adapters.hpp

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

include/nlohmann/detail/output/serializer.hpp

@@ -3,8 +3,8 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2008 - 2009 Björn Hoehrmann <bjoern@hoehrmann.de>
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2008, 2009 Björn Hoehrmann <bjoern@hoehrmann.de>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #pragma once
@@ -919,7 +919,7 @@ class serializer
             }
         };
 
-        JSON_ASSERT(byte < utf8d.size());
+        JSON_ASSERT(static_cast<std::size_t>(byte) < utf8d.size());
         const std::uint8_t type = utf8d[byte];
 
         codep = (state != UTF8_ACCEPT)

include/nlohmann/detail/string_concat.hpp

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

include/nlohmann/detail/string_escape.hpp

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

include/nlohmann/detail/string_utils.hpp

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

include/nlohmann/detail/value_t.hpp

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

include/nlohmann/json.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 /****************************************************************************\
@@ -253,7 +253,7 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
     {
         basic_json result;
 
-        result["copyright"] = "(C) 2013-2025 Niels Lohmann";
+        result["copyright"] = "(C) 2013-2026 Niels Lohmann";
         result["name"] = "JSON for Modern C++";
         result["url"] = "https://github.com/nlohmann/json";
         result["version"]["string"] =
@@ -5274,26 +5274,44 @@ inline namespace json_literals
 /// @sa https://json.nlohmann.me/api/basic_json/operator_literal_json/
 JSON_HEDLEY_NON_NULL(1)
 #if !defined(JSON_HEDLEY_GCC_VERSION) || JSON_HEDLEY_GCC_VERSION_CHECK(4,9,0)
-    inline nlohmann::json operator ""_json(const char* s, std::size_t n)
+    inline nlohmann::json operator""_json(const char* s, std::size_t n)
 #else
-    inline nlohmann::json operator "" _json(const char* s, std::size_t n)
+    // GCC 4.8 requires a space between "" and suffix
+    inline nlohmann::json operator"" _json(const char* s, std::size_t n)
 #endif
 {
     return nlohmann::json::parse(s, s + n);
 }
 
+#if defined(__cpp_char8_t)
+JSON_HEDLEY_NON_NULL(1)
+inline nlohmann::json operator""_json(const char8_t* s, std::size_t n)
+{
+    return nlohmann::json::parse(reinterpret_cast<const char*>(s),
+                                 reinterpret_cast<const char*>(s) + n);
+}
+#endif
+
 /// @brief user-defined string literal for JSON pointer
 /// @sa https://json.nlohmann.me/api/basic_json/operator_literal_json_pointer/
 JSON_HEDLEY_NON_NULL(1)
 #if !defined(JSON_HEDLEY_GCC_VERSION) || JSON_HEDLEY_GCC_VERSION_CHECK(4,9,0)
-    inline nlohmann::json::json_pointer operator ""_json_pointer(const char* s, std::size_t n)
+    inline nlohmann::json::json_pointer operator""_json_pointer(const char* s, std::size_t n)
 #else
-    inline nlohmann::json::json_pointer operator "" _json_pointer(const char* s, std::size_t n)
+    // GCC 4.8 requires a space between "" and suffix
+    inline nlohmann::json::json_pointer operator"" _json_pointer(const char* s, std::size_t n)
 #endif
 {
     return nlohmann::json::json_pointer(std::string(s, n));
 }
 
+#if defined(__cpp_char8_t)
+inline nlohmann::json::json_pointer operator""_json_pointer(const char8_t* s, std::size_t n)
+{
+    return nlohmann::json::json_pointer(std::string(reinterpret_cast<const char*>(s), n));
+}
+#endif
+
 }  // namespace json_literals
 }  // namespace literals
 NLOHMANN_JSON_NAMESPACE_END
@@ -5354,11 +5372,12 @@ inline void swap(nlohmann::NLOHMANN_BASIC_JSON_TPL& j1, nlohmann::NLOHMANN_BASIC
 
 #if JSON_USE_GLOBAL_UDLS
     #if !defined(JSON_HEDLEY_GCC_VERSION) || JSON_HEDLEY_GCC_VERSION_CHECK(4,9,0)
-        using nlohmann::literals::json_literals::operator ""_json; // NOLINT(misc-unused-using-decls,google-global-names-in-headers)
-        using nlohmann::literals::json_literals::operator ""_json_pointer; //NOLINT(misc-unused-using-decls,google-global-names-in-headers)
+        using nlohmann::literals::json_literals::operator""_json; // NOLINT(misc-unused-using-decls,google-global-names-in-headers)
+        using nlohmann::literals::json_literals::operator""_json_pointer; //NOLINT(misc-unused-using-decls,google-global-names-in-headers)
     #else
-        using nlohmann::literals::json_literals::operator "" _json; // NOLINT(misc-unused-using-decls,google-global-names-in-headers)
-        using nlohmann::literals::json_literals::operator "" _json_pointer; //NOLINT(misc-unused-using-decls,google-global-names-in-headers)
+        // GCC 4.8 requires a space between "" and suffix
+        using nlohmann::literals::json_literals::operator"" _json; // NOLINT(misc-unused-using-decls,google-global-names-in-headers)
+        using nlohmann::literals::json_literals::operator"" _json_pointer; //NOLINT(misc-unused-using-decls,google-global-names-in-headers)
     #endif
 #endif
 

include/nlohmann/json_fwd.hpp

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

include/nlohmann/ordered_map.hpp

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

include/nlohmann/thirdparty/hedley/hedley.hpp

@@ -5,12 +5,13 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
-// SPDX-FileCopyrightText: 2016 - 2021 Evan Nemerson <evan@nemerson.com>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2016-2021 Evan Nemerson <evan@nemerson.com>
 // SPDX-License-Identifier: MIT
 
 /* Hedley - https://nemequ.github.io/hedley
  * Created by Evan Nemerson <evan@nemerson.com>
+ * SPDX-License-Identifier: CC0-1.0
  */
 
 #if !defined(JSON_HEDLEY_VERSION) || (JSON_HEDLEY_VERSION < 15)

include/nlohmann/thirdparty/hedley/hedley_undef.hpp

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

single_include/nlohmann/json.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 /****************************************************************************\
@@ -37,7 +37,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -50,7 +50,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -163,7 +163,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -186,7 +186,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -206,7 +206,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -222,7 +222,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -234,7 +234,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -247,7 +247,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -334,12 +334,13 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
-// SPDX-FileCopyrightText: 2016 - 2021 Evan Nemerson <evan@nemerson.com>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2016-2021 Evan Nemerson <evan@nemerson.com>
 // SPDX-License-Identifier: MIT
 
 /* Hedley - https://nemequ.github.io/hedley
  * Created by Evan Nemerson <evan@nemerson.com>
+ * SPDX-License-Identifier: CC0-1.0
  */
 
 #if !defined(JSON_HEDLEY_VERSION) || (JSON_HEDLEY_VERSION < 15)
@@ -3072,7 +3073,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -3147,7 +3148,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -3189,7 +3190,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-FileCopyrightText: 2018 The Abseil Authors
 // SPDX-License-Identifier: MIT
 
@@ -3363,7 +3364,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -3382,7 +3383,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -3450,7 +3451,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -3470,7 +3471,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -3494,7 +3495,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #ifndef INCLUDE_NLOHMANN_JSON_FWD_HPP_
@@ -4102,6 +4103,28 @@ template<typename BasicJsonType, typename CompatibleType>
 struct is_compatible_type
     : is_compatible_type_impl<BasicJsonType, CompatibleType> {};
 
+template<typename BasicJsonType, typename CompatibleReferenceType>
+struct is_compatible_reference_type_impl
+{
+    using JsonType = uncvref_t<BasicJsonType>;
+    using CVType = typename std::remove_reference<CompatibleReferenceType>::type;
+    using Type = typename std::remove_cv<CVType>::type;
+    constexpr static bool value = std::is_reference<CompatibleReferenceType>::value &&
+                                  (!std::is_const<typename std::remove_reference<BasicJsonType>::type>::value || std::is_const<CVType>::value) &&
+                                  (std::is_same<typename JsonType::boolean_t, Type>::value ||
+                                   std::is_same<typename JsonType::number_float_t, Type>::value ||
+                                   std::is_same<typename JsonType::number_integer_t, Type>::value ||
+                                   std::is_same<typename JsonType::number_unsigned_t, Type>::value ||
+                                   std::is_same<typename JsonType::string_t, Type>::value ||
+                                   std::is_same<typename JsonType::binary_t, Type>::value ||
+                                   std::is_same<typename JsonType::object_t, Type>::value ||
+                                   std::is_same<typename JsonType::array_t, Type>::value);
+};
+
+template<typename BasicJsonType, typename CompatibleReferenceType>
+struct is_compatible_reference_type
+    : is_compatible_reference_type_impl<BasicJsonType, CompatibleReferenceType> {};
+
 template<typename T1, typename T2>
 struct is_constructible_tuple : std::false_type {};
 
@@ -4128,14 +4151,29 @@ struct is_specialization_of<Primary, Primary<Args...>> : std::true_type {};
 template<typename T>
 using is_json_pointer = is_specialization_of<::nlohmann::json_pointer, uncvref_t<T>>;
 
+// checks if B is a json_pointer<A>
+template <typename A, typename B>
+struct is_json_pointer_of : std::false_type {};
+
+template <typename A>
+struct is_json_pointer_of<A, ::nlohmann::json_pointer<A>> : std::true_type {};
+
+template <typename A>
+struct is_json_pointer_of<A, ::nlohmann::json_pointer<A>&> : std::true_type {};
+
 // checks if A and B are comparable using Compare functor
 template<typename Compare, typename A, typename B, typename = void>
 struct is_comparable : std::false_type {};
 
+// We exclude json_pointer here, because the checks using Compare(A, B) will
+// use json_pointer::operator string_t() which triggers a deprecation warning
+// for GCC. See https://github.com/nlohmann/json/issues/4621. The call to
+// is_json_pointer_of can be removed once the deprecated function has been
+// removed.
 template<typename Compare, typename A, typename B>
-struct is_comparable<Compare, A, B, void_t<
-decltype(std::declval<Compare>()(std::declval<A>(), std::declval<B>())),
-decltype(std::declval<Compare>()(std::declval<B>(), std::declval<A>()))
+struct is_comparable < Compare, A, B, enable_if_t < !is_json_pointer_of<A, B>::value
+&& std::is_constructible <decltype(std::declval<Compare>()(std::declval<A>(), std::declval<B>()))>::value
+&& std::is_constructible <decltype(std::declval<Compare>()(std::declval<B>(), std::declval<A>()))>::value
 >> : std::true_type {};
 
 template<typename T>
@@ -4164,11 +4202,14 @@ using is_usable_as_key_type = typename std::conditional <
 template<typename BasicJsonType, typename KeyTypeCVRef, bool RequireTransparentComparator = true,
          bool ExcludeObjectKeyType = RequireTransparentComparator, typename KeyType = uncvref_t<KeyTypeCVRef>>
 using is_usable_as_basic_json_key_type = typename std::conditional <
-    is_usable_as_key_type<typename BasicJsonType::object_comparator_t,
-    typename BasicJsonType::object_t::key_type, KeyTypeCVRef,
-    RequireTransparentComparator, ExcludeObjectKeyType>::value
-    && !is_json_iterator_of<BasicJsonType, KeyType>::value,
-    std::true_type,
+    (is_usable_as_key_type<typename BasicJsonType::object_comparator_t,
+     typename BasicJsonType::object_t::key_type, KeyTypeCVRef,
+     RequireTransparentComparator, ExcludeObjectKeyType>::value
+     && !is_json_iterator_of<BasicJsonType, KeyType>::value)
+#ifdef JSON_HAS_CPP_17
+    || std::is_convertible<KeyType, std::string_view>::value
+#endif
+    , std::true_type,
     std::false_type >::type;
 
 template<typename ObjectType, typename KeyType>
@@ -4369,7 +4410,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -4789,7 +4830,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -4813,7 +4854,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -4841,6 +4882,63 @@ NLOHMANN_JSON_NAMESPACE_END
 
 // #include <nlohmann/detail/meta/type_traits.hpp>
 
+// #include <nlohmann/detail/meta/logic.hpp>
+
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+
+NLOHMANN_JSON_NAMESPACE_BEGIN
+namespace detail
+{
+#ifdef JSON_HAS_CPP_17
+
+template<bool... Booleans>
+struct cxpr_or_impl : std::integral_constant < bool, (Booleans || ...) > {};
+
+template<bool... Booleans>
+struct cxpr_and_impl : std::integral_constant < bool, (Booleans &&...) > {};
+
+#else
+
+template<bool... Booleans>
+struct cxpr_or_impl : std::false_type {};
+
+template<bool... Booleans>
+struct cxpr_or_impl<true, Booleans...> : std::true_type {};
+
+template<bool... Booleans>
+struct cxpr_or_impl<false, Booleans...> : cxpr_or_impl<Booleans...> {};
+
+template<bool... Booleans>
+struct cxpr_and_impl : std::true_type {};
+
+template<bool... Booleans>
+struct cxpr_and_impl<true, Booleans...> : cxpr_and_impl<Booleans...> {};
+
+template<bool... Booleans>
+struct cxpr_and_impl<false, Booleans...> : std::false_type {};
+
+#endif
+
+template<class Boolean>
+struct cxpr_not : std::integral_constant < bool, !Boolean::value > {};
+
+template<class... Booleans>
+struct cxpr_or : cxpr_or_impl<Booleans::value...> {};
+
+template<bool... Booleans>
+struct cxpr_or_c : cxpr_or_impl<Booleans...> {};
+
+template<class... Booleans>
+struct cxpr_and : cxpr_and_impl<Booleans::value...> {};
+
+template<bool... Booleans>
+struct cxpr_and_c : cxpr_and_impl<Booleans...> {};
+
+}  // namespace detail
+NLOHMANN_JSON_NAMESPACE_END
+
 // #include <nlohmann/detail/string_concat.hpp>
 
 // #include <nlohmann/detail/value_t.hpp>
@@ -4870,7 +4968,8 @@ 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())
@@ -5262,13 +5361,36 @@ inline void from_json(const BasicJsonType& j, ArithmeticType& val)
     }
 }
 
-template<typename BasicJsonType, typename... Args, std::size_t... Idx>
-std::tuple<Args...> from_json_tuple_impl_base(BasicJsonType&& j, index_sequence<Idx...> /*unused*/)
+template<typename BasicJsonType, typename Type>
+detail::uncvref_t<Type> from_json_tuple_get_impl(BasicJsonType&& j, detail::identity_tag<Type> /*unused*/, detail::priority_tag<0> /*unused*/)
 {
-    return std::make_tuple(std::forward<BasicJsonType>(j).at(Idx).template get<Args>()...);
+    return std::forward<BasicJsonType>(j).template get<detail::uncvref_t<Type>>();
 }
 
-template<typename BasicJsonType>
+template<typename BasicJsonType, typename Type,
+         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 {};
@@ -5290,13 +5412,15 @@ 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*/)
 {
-    return from_json_tuple_impl_base<BasicJsonType, Args...>(std::forward<BasicJsonType>(j), index_sequence_for<Args...> {});
+    static_assert(cxpr_and<cxpr_or<cxpr_not<std::is_reference<Args>>, is_compatible_reference_type<BasicJsonType, Args>>...>::value,
+                  "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<BasicJsonType, Args...>(std::forward<BasicJsonType>(j), index_sequence_for<Args...> {});
+    t = from_json_tuple_impl_base<2, Args...>(std::forward<BasicJsonType>(j), index_sequence_for<Args...> {});
 }
 
 template<typename BasicJsonType, typename TupleRelated>
@@ -5405,7 +5529,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -5432,7 +5556,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -5456,7 +5580,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -6218,7 +6342,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -6330,7 +6454,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -6463,7 +6587,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -6492,7 +6616,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -7048,7 +7172,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -7067,7 +7191,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -7931,6 +8055,8 @@ class lexer : public lexer_base<BasicJsonType>
                             break;
                     }
                 }
+
+                JSON_HEDLEY_UNREACHABLE();
             }
 
             // multi-line comments skip input until */ is read
@@ -7966,6 +8092,8 @@ class lexer : public lexer_base<BasicJsonType>
                             continue;
                     }
                 }
+
+                JSON_HEDLEY_UNREACHABLE();
             }
 
             // unexpected character after reading '/'
@@ -9691,7 +9819,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -10247,6 +10375,25 @@ 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)
     {
@@ -10335,29 +10482,16 @@ class binary_reader
                 return sax->number_integer(static_cast<std::int8_t>(0x20 - 1 - current));
 
             case 0x38: // Negative integer (one-byte uint8_t follows)
-            {
-                std::uint8_t number{};
-                return get_number(input_format_t::cbor, number) && sax->number_integer(static_cast<number_integer_t>(-1) - number);
-            }
+                return get_cbor_negative_integer<std::uint8_t>();
 
             case 0x39: // Negative integer -1-n (two-byte uint16_t follows)
-            {
-                std::uint16_t number{};
-                return get_number(input_format_t::cbor, number) && sax->number_integer(static_cast<number_integer_t>(-1) - number);
-            }
+                return get_cbor_negative_integer<std::uint16_t>();
 
             case 0x3A: // Negative integer -1-n (four-byte uint32_t follows)
-            {
-                std::uint32_t number{};
-                return get_number(input_format_t::cbor, number) && sax->number_integer(static_cast<number_integer_t>(-1) - number);
-            }
+                return get_cbor_negative_integer<std::uint32_t>();
 
             case 0x3B: // Negative integer -1-n (eight-byte uint64_t follows)
-            {
-                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));
-            }
+                return get_cbor_negative_integer<std::uint64_t>();
 
             // Binary data (0x00..0x17 bytes follow)
             case 0x40:
@@ -12912,7 +13046,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -13458,7 +13592,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -13471,7 +13605,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -13630,7 +13764,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -14401,7 +14535,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -14536,7 +14670,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -14578,7 +14712,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -15573,7 +15707,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -15667,7 +15801,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -15693,7 +15827,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -17686,8 +17820,8 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2008 - 2009 Björn Hoehrmann <bjoern@hoehrmann.de>
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2008, 2009 Björn Hoehrmann <bjoern@hoehrmann.de>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -17712,7 +17846,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
 // SPDX-FileCopyrightText: 2009 Florian Loitsch <https://florian.loitsch.com/>
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -19729,7 +19863,7 @@ class serializer
             }
         };
 
-        JSON_ASSERT(byte < utf8d.size());
+        JSON_ASSERT(static_cast<std::size_t>(byte) < utf8d.size());
         const std::uint8_t type = utf8d[byte];
 
         codep = (state != UTF8_ACCEPT)
@@ -19807,7 +19941,7 @@ NLOHMANN_JSON_NAMESPACE_END
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -20356,7 +20490,7 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
     {
         basic_json result;
 
-        result["copyright"] = "(C) 2013-2025 Niels Lohmann";
+        result["copyright"] = "(C) 2013-2026 Niels Lohmann";
         result["name"] = "JSON for Modern C++";
         result["url"] = "https://github.com/nlohmann/json";
         result["version"]["string"] =
@@ -25377,26 +25511,44 @@ inline namespace json_literals
 /// @sa https://json.nlohmann.me/api/basic_json/operator_literal_json/
 JSON_HEDLEY_NON_NULL(1)
 #if !defined(JSON_HEDLEY_GCC_VERSION) || JSON_HEDLEY_GCC_VERSION_CHECK(4,9,0)
-    inline nlohmann::json operator ""_json(const char* s, std::size_t n)
+    inline nlohmann::json operator""_json(const char* s, std::size_t n)
 #else
-    inline nlohmann::json operator "" _json(const char* s, std::size_t n)
+    // GCC 4.8 requires a space between "" and suffix
+    inline nlohmann::json operator"" _json(const char* s, std::size_t n)
 #endif
 {
     return nlohmann::json::parse(s, s + n);
 }
 
+#if defined(__cpp_char8_t)
+JSON_HEDLEY_NON_NULL(1)
+inline nlohmann::json operator""_json(const char8_t* s, std::size_t n)
+{
+    return nlohmann::json::parse(reinterpret_cast<const char*>(s),
+                                 reinterpret_cast<const char*>(s) + n);
+}
+#endif
+
 /// @brief user-defined string literal for JSON pointer
 /// @sa https://json.nlohmann.me/api/basic_json/operator_literal_json_pointer/
 JSON_HEDLEY_NON_NULL(1)
 #if !defined(JSON_HEDLEY_GCC_VERSION) || JSON_HEDLEY_GCC_VERSION_CHECK(4,9,0)
-    inline nlohmann::json::json_pointer operator ""_json_pointer(const char* s, std::size_t n)
+    inline nlohmann::json::json_pointer operator""_json_pointer(const char* s, std::size_t n)
 #else
-    inline nlohmann::json::json_pointer operator "" _json_pointer(const char* s, std::size_t n)
+    // GCC 4.8 requires a space between "" and suffix
+    inline nlohmann::json::json_pointer operator"" _json_pointer(const char* s, std::size_t n)
 #endif
 {
     return nlohmann::json::json_pointer(std::string(s, n));
 }
 
+#if defined(__cpp_char8_t)
+inline nlohmann::json::json_pointer operator""_json_pointer(const char8_t* s, std::size_t n)
+{
+    return nlohmann::json::json_pointer(std::string(reinterpret_cast<const char*>(s), n));
+}
+#endif
+
 }  // namespace json_literals
 }  // namespace literals
 NLOHMANN_JSON_NAMESPACE_END
@@ -25457,11 +25609,12 @@ inline void swap(nlohmann::NLOHMANN_BASIC_JSON_TPL& j1, nlohmann::NLOHMANN_BASIC
 
 #if JSON_USE_GLOBAL_UDLS
     #if !defined(JSON_HEDLEY_GCC_VERSION) || JSON_HEDLEY_GCC_VERSION_CHECK(4,9,0)
-        using nlohmann::literals::json_literals::operator ""_json; // NOLINT(misc-unused-using-decls,google-global-names-in-headers)
-        using nlohmann::literals::json_literals::operator ""_json_pointer; //NOLINT(misc-unused-using-decls,google-global-names-in-headers)
+        using nlohmann::literals::json_literals::operator""_json; // NOLINT(misc-unused-using-decls,google-global-names-in-headers)
+        using nlohmann::literals::json_literals::operator""_json_pointer; //NOLINT(misc-unused-using-decls,google-global-names-in-headers)
     #else
-        using nlohmann::literals::json_literals::operator "" _json; // NOLINT(misc-unused-using-decls,google-global-names-in-headers)
-        using nlohmann::literals::json_literals::operator "" _json_pointer; //NOLINT(misc-unused-using-decls,google-global-names-in-headers)
+        // GCC 4.8 requires a space between "" and suffix
+        using nlohmann::literals::json_literals::operator"" _json; // NOLINT(misc-unused-using-decls,google-global-names-in-headers)
+        using nlohmann::literals::json_literals::operator"" _json_pointer; //NOLINT(misc-unused-using-decls,google-global-names-in-headers)
     #endif
 #endif
 
@@ -25471,7 +25624,7 @@ inline void swap(nlohmann::NLOHMANN_BASIC_JSON_TPL& j1, nlohmann::NLOHMANN_BASIC
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 
@@ -25518,7 +25671,7 @@ inline void swap(nlohmann::NLOHMANN_BASIC_JSON_TPL& j1, nlohmann::NLOHMANN_BASIC
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 

single_include/nlohmann/json_fwd.hpp

@@ -3,7 +3,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 #ifndef INCLUDE_NLOHMANN_JSON_FWD_HPP_
@@ -21,7 +21,7 @@
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
-// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 
 

src/modules/json.cppm

@@ -12,3 +12,21 @@ export namespace nlohmann {
     using ::nlohmann::ordered_json;
     using ::nlohmann::ordered_map;
 }  // namespace nlohmann
+
+NLOHMANN_JSON_NAMESPACE_BEGIN
+
+namespace detail
+{
+    export using NLOHMANN_JSON_NAMESPACE::detail::json_sax_dom_callback_parser;
+    export using NLOHMANN_JSON_NAMESPACE::detail::unknown_size;
+} // namespace detail
+
+export using NLOHMANN_JSON_NAMESPACE::adl_serializer;
+export using NLOHMANN_JSON_NAMESPACE::basic_json;
+export using NLOHMANN_JSON_NAMESPACE::json;
+export using NLOHMANN_JSON_NAMESPACE::json_pointer;
+export using NLOHMANN_JSON_NAMESPACE::ordered_json;
+export using NLOHMANN_JSON_NAMESPACE::ordered_map;
+export using NLOHMANN_JSON_NAMESPACE::to_string;
+
+NLOHMANN_JSON_NAMESPACE_END