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Signed-off-by: Toyosatomimi no Miko <110693261+mikomikotaishi@users.noreply.github.com>
This commit is contained in:
Toyosatomimi no Miko 2025-06-01 15:49:38 -04:00
parent a56e9d2700
commit e4553073cc
5 changed files with 9 additions and 7 deletions
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6
CMakeLists.txt
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@ -27,10 +27,10 @@ option(NLOHMANN_JSON_BUILD_MODULES "Build C++ modules support" OFF)
if(NLOHMANN_JSON_BUILD_MODULES)
if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.28)
message(STATUS "Building nlohmann-json C++ modules (CMake ${CMAKE_VERSION} supports modules)")
add_subdirectory(modules)
message(STATUS "Building nlohmann.json C++ module")
add_subdirectory(src/modules)
else()
message(WARNING "Skipping nlohmann-json C++ modules (requires CMake 3.28+, found ${CMAKE_VERSION})")
message(WARNING "Skipping nlohmann.json C++ module (requires CMake 3.28+, found ${CMAKE_VERSION})")
endif()
endif()

4
docs/mkdocs/docs/features/modules.md
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@ -1,6 +1,8 @@
# Modules
This library supports C++ modules, introduced in C++20. The library can be imported by writing `import nlohmann.json;` instead of `#include <nlohmann/json.hpp>`.
This library has experimental support for C++ modules, introduced in C++20. The library can be imported by writing `import nlohmann.json;` instead of `#include <nlohmann/json.hpp>`.
Please be aware that the module is experimental and a full test is outstanding, and the exported symbols are subject to change.
## Requirements
The `nlohmann.json` module requires that the build system is configured to build and resolve modules when imported. Obviously, as modules were introduced in C++20, this feature can only be used in C++20 and subsequent versions.

0
modules/CMakeLists.txt → src/modules/CMakeLists.txt
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0
modules/json.cppm → src/modules/json.cppm
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6
tests/module_cpp20/CMakeLists.txt
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@ -2,11 +2,11 @@ cmake_minimum_required(VERSION 3.28)
project(json_test CXX)
set(nlohmann_json_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../../build/modules)
set(nlohmann_json_DIR ${CMAKE_BINARY_DIR}/modules)
set(NLOHMANN_JSON_BUILD_MODULES ON CACHE BOOL "Enable nlohmann-json module support")
set(NLOHMANN_JSON_BUILD_MODULES ON CACHE BOOL "Enable nlohmann.json module support")
add_subdirectory(../.. build)
add_subdirectory(${CMAKE_SOURCE_DIR}/../.. ${CMAKE_BINARY_DIR}/tests)
add_executable(json_test main.cpp)
target_link_libraries(json_test