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Avoid installation if included as a subproject #47

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Avoid installation if included as a subproject #47

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8d2ef16
Avoid installation if included as a subproject
nicola-gigante Mar 27, 2020
7addf48
Fix build for C++20
andreasWallner Sep 12, 2020
2494d2a
Merge pull request #1 from andreasWallner/c++20
nicola-gigante Jun 12, 2022
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39 changes: 25 additions & 14 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -21,20 +21,31 @@ write_basic_package_version_file(
${CONFIG_VERSION_FILE} COMPATIBILITY AnyNewerVersion
)

install(DIRECTORY include/
DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
FILES_MATCHING PATTERN "*.h"
)
install(TARGETS ${PROJECT_NAME}
EXPORT ${PROJECT_NAME}-config
)
install(EXPORT ${PROJECT_NAME}-config
DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/${PROJECT_NAME}
NAMESPACE ${PROJECT_NAME}::
)
install(FILES ${CONFIG_VERSION_FILE}
DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/${PROJECT_NAME}
)
# Determine if clipp is built as a subproject (using add_subdirectory)
# or if it is the master project.
set(MASTER_PROJECT OFF)
if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
set(MASTER_PROJECT ON)
endif ()

option(CLIPP_INSTALL "Generate the install target." ${MASTER_PROJECT})

if(CLIPP_INSTALL)
install(DIRECTORY include/
DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
FILES_MATCHING PATTERN "*.h"
)
install(TARGETS ${PROJECT_NAME}
EXPORT ${PROJECT_NAME}-config
)
install(EXPORT ${PROJECT_NAME}-config
DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/${PROJECT_NAME}
NAMESPACE ${PROJECT_NAME}::
)
install(FILES ${CONFIG_VERSION_FILE}
DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/${PROJECT_NAME}
)
endif()

option(BUILD_TESTING "Do not build tests by default" OFF)
include(CTest)
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22 changes: 19 additions & 3 deletions include/clipp.h
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Original file line number Diff line number Diff line change
Expand Up @@ -155,23 +155,39 @@ namespace traits {
* @brief function (class) signature type trait
*
*****************************************************************************/
#if defined(__cpp_lib_is_invocable)
template<class Fn, class Ret, class... Args>
constexpr auto
check_is_callable(int) -> decltype(
std::declval<Fn>()(std::declval<Args>()...),
std::integral_constant<bool,
std::is_same<Ret,typename std::result_of<Fn(Args...)>::type>::value>{} );
std::is_same<Ret,typename std::invoke_result<Fn,Args...>::type>::value>{} );

template<class,class,class...>
template<class Fn, class Ret>
constexpr auto
check_is_callable(long) -> std::false_type;
check_is_callable_without_arg(int) -> decltype(
std::declval<Fn>()(),
std::integral_constant<bool,
std::is_same<Ret,typename std::invoke_result<Fn>::type>::value>{} );
#else
template<class Fn, class Ret, class... Args>
constexpr auto
check_is_callable(int) -> decltype(
std::declval<Fn>()(std::declval<Args>()...),
std::integral_constant<bool,
std::is_same<Ret,typename std::result_of<Fn(Args...)>::type>::value>{} );

template<class Fn, class Ret>
constexpr auto
check_is_callable_without_arg(int) -> decltype(
std::declval<Fn>()(),
std::integral_constant<bool,
std::is_same<Ret,typename std::result_of<Fn()>::type>::value>{} );
#endif

template<class,class,class...>
constexpr auto
check_is_callable(long) -> std::false_type;

template<class,class>
constexpr auto
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