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Add proper C++20 module support (#4799)

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This commit is contained in:
Miko
2025-06-29 16:02:31 -04:00
committed by GitHub
parent d70e46bc65
commit b7f741165b
10 changed files with 123 additions and 24 deletions
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17
tests/module_cpp20/CMakeLists.txt
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@@ -2,11 +2,18 @@ cmake_minimum_required(VERSION 3.28)
project(json_test CXX)
add_executable(json_test)
set(NLOHMANN_JSON_BUILD_MODULES ON CACHE BOOL "Enable nlohmann.json module support")
target_sources(json_test
PRIVATE main.cpp
PUBLIC FILE_SET cxx_modules TYPE CXX_MODULES FILES json.cpp)
add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/../.. ${CMAKE_CURRENT_BINARY_DIR}/tests)
add_executable(json_test main.cpp)
target_link_libraries(json_test
PRIVATE
nlohmann_json_modules
)
target_compile_definitions(json_test
PRIVATE NLOHMANN_JSON_BUILD_MODULES
)
target_compile_features(json_test PUBLIC cxx_std_20)
target_include_directories(json_test PRIVATE ../../include)

17
tests/module_cpp20/json.cpp
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@@ -1,17 +0,0 @@
module;
#include <nlohmann/json.hpp>
export module json;
export namespace nlohmann
{
using ::nlohmann::adl_serializer;
using ::nlohmann::basic_json;
using ::nlohmann::json_pointer;
using ::nlohmann::json;
using ::nlohmann::ordered_json;
using ::nlohmann::ordered_map;
using ::nlohmann::json_pointer;
} // namespace nlohmann

2
tests/module_cpp20/main.cpp
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@@ -1,4 +1,4 @@
import json;
import nlohmann.json;
int main()
{