Overwork project infrastructure (#5218)

* 📝 overwork project infrastructure

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* 🐛 fix GCC16 issue

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* 🐛 fix GCC16 issue

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* 🐛 only build module for GCC

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* 🐛 fix build

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* 📝 fix documentation

Closes #5012: fix the error_handler_t::ignore wording

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* 📝 fix documentation

Closes #4354: fix "Custom data source" example

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

---------

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

cmake/download_test_data.cmake

@@ -12,7 +12,7 @@ else()
     # create a header with the path to the downloaded test data
     file(WRITE ${CMAKE_BINARY_DIR}/include/test_data.hpp "#define TEST_DATA_DIRECTORY \"${CMAKE_BINARY_DIR}/test_files\"\n")
 
-    # download test data from GitHub release
+    # download test data from the GitHub tag source archive
     ExternalProject_Add(download_test_data_project
         URL "${JSON_TEST_DATA_URL}/archive/refs/tags/v${JSON_TEST_DATA_VERSION}.zip"
         SOURCE_DIR "${CMAKE_BINARY_DIR}/test_files"
@@ -32,13 +32,17 @@ endif()
 
 # determine the operating system (for debug and support purposes)
 find_program(UNAME_COMMAND uname)
-find_program(VER_COMMAND ver)
 find_program(LSB_RELEASE_COMMAND lsb_release)
 find_program(SW_VERS_COMMAND sw_vers)
 set(OS_VERSION_STRINGS "${CMAKE_SYSTEM}")
-if (VER_COMMAND)
-    execute_process(COMMAND ${VER_COMMAND} OUTPUT_VARIABLE VER_COMMAND_RESULT OUTPUT_STRIP_TRAILING_WHITESPACE)
-    set(OS_VERSION_STRINGS "${OS_VERSION_STRINGS}; ${VER_COMMAND_RESULT}")
+if (CMAKE_HOST_WIN32)
+    # "ver" is a cmd.exe builtin rather than a standalone executable, so it
+    # cannot be located with find_program and must be invoked through cmd
+    execute_process(COMMAND cmd /c ver OUTPUT_VARIABLE VER_COMMAND_RESULT ERROR_QUIET)
+    string(STRIP "${VER_COMMAND_RESULT}" VER_COMMAND_RESULT)
+    if (VER_COMMAND_RESULT)
+        set(OS_VERSION_STRINGS "${OS_VERSION_STRINGS}; ${VER_COMMAND_RESULT}")
+    endif()
 endif()
 if (SW_VERS_COMMAND)
     execute_process(COMMAND ${SW_VERS_COMMAND} OUTPUT_VARIABLE SW_VERS_COMMAND_RESULT OUTPUT_STRIP_TRAILING_WHITESPACE ERROR_QUIET)

cmake/test.cmake

@@ -35,6 +35,8 @@ foreach(feature ${CMAKE_CXX_COMPILE_FEATURES})
         set(compiler_supports_cpp_20 TRUE)
     elseif (${feature} STREQUAL cxx_std_23)
         set(compiler_supports_cpp_23 TRUE)
+    elseif (${feature} STREQUAL cxx_std_26)
+        set(compiler_supports_cpp_26 TRUE)
     endif()
 endforeach()
 
@@ -92,7 +94,6 @@ function(json_test_set_test_options tests)
             target_compile_options(${test_interface} INTERFACE ${args_COMPILE_OPTIONS})
             target_link_libraries (${test_interface} INTERFACE ${args_LINK_LIBRARIES})
             target_link_options(${test_interface} INTERFACE ${args_LINK_OPTIONS})
-            #set_target_properties(${test_interface} PROPERTIES JSON_TEST_PROPERTIES "${args_TEST_PROPERTIES}")
             set_property(DIRECTORY PROPERTY
                 ${test_interface}_TEST_PROPERTIES "${args_TEST_PROPERTIES}"
             )
@@ -102,7 +103,6 @@ endfunction()
 
 # for internal use by _json_test_add_test()
 function(_json_test_apply_test_properties test_target properties_target)
-    #get_target_property(test_properties ${properties_target} JSON_TEST_PROPERTIES)
     get_property(test_properties DIRECTORY PROPERTY ${properties_target}_TEST_PROPERTIES)
     if(test_properties)
         set_tests_properties(${test_target} PROPERTIES ${test_properties})
@@ -213,10 +213,10 @@ function(json_test_add_test_for file)
 
     if("${args_NAME}" STREQUAL "")
         get_filename_component(file_basename ${file} NAME_WE)
-        string(REGEX REPLACE "unit-([^$]+)" "test-\\1" test_name ${file_basename})
+        string(REGEX REPLACE "unit-(.+)" "test-\\1" test_name ${file_basename})
     else()
         set(test_name ${args_NAME})
-        if(NOT test_name MATCHES "test-[^$]+")
+        if(NOT test_name MATCHES "test-.+")
             message(FATAL_ERROR "Test name must start with 'test-'.")
         endif()
     endif()