json/docs/mkdocs/docs at 4dec78e37d5beba82124caee794c6fe7002c8b00 - json

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Niels Lohmann 4dec78e37d Document that JSON_Diagnostics CMake option doesn't apply to pre-installed packages

Closes #3106. set(JSON_Diagnostics ON) before find_package() has no
effect on a package built and installed elsewhere (Homebrew, vcpkg, a
system package, etc.) -- the compile definition is baked into the
exported nlohmann_jsonTargets.cmake at install time and the generated
config script never re-reads that variable. Verified empirically
against the real Homebrew-installed 3.12.0 package: the exported
target carries a fixed $<$<BOOL:OFF>:JSON_DIAGNOSTICS=1>, and the
suggested set(JSON_Diagnostics ON) snippet produces no change in
exception output.

Documents the actual working fix (overriding the imported target's
INTERFACE_COMPILE_DEFINITIONS property after find_package()) and the
multi-target "JSON_DIAGNOSTICS redefined" pitfall reported earlier in
the issue thread.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

2026-07-11 18:55:18 +02:00

api

Document that JSON_Diagnostics CMake option doesn't apply to pre-installed packages

2026-07-11 18:55:18 +02:00

community

Migrate remaining CI jobs off custom json-ci image to official images (#5263 )

2026-07-10 16:11:41 +02:00

css

Clean up and document project files (#4560 )

2025-01-17 06:53:35 +01:00

examples

Document a duplicate-object-key rejection recipe (#5259 )