add single-header version

.ci/build_singles.py

@@ -0,0 +1,114 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import os
+import re
+import sys
+
+#
+#
+#
+
+EMPTY_MATCHER = re.compile(r'^\s*$')
+C_COMMENT_MATCHER = re.compile(r'^/\*.*\*/', re.S)
+
+USER_INCLUDE_MATCHER = re.compile(r'#\s*include\s*\"(.*)\"')
+SYSTEM_INCLUDE_MATCHER = re.compile(r'#\s*include\s*<(.*)>')
+PRAGMA_ONCE_MATCHER = re.compile(r'#\s*pragma\s+once')
+
+#
+#
+#
+
+def CollectLicenseComment(headerPath):
+    with open(headerPath, "r") as headerStream:
+        headerContent = headerStream.read().strip()
+        commentMatch = re.match(C_COMMENT_MATCHER, headerContent)
+        return commentMatch.group() if commentMatch else ""
+
+def CollectSystemIncludes(headerPath, parsedHeaders = set()):
+    with open(headerPath, "r") as headerStream:
+        headerContent = headerStream.read().strip()
+
+        if PRAGMA_ONCE_MATCHER.search(headerContent) and headerPath in parsedHeaders:
+            return set()
+
+        headerIncludes = set()
+        
+        parsedHeaders.add(headerPath)
+        headerLines = headerContent.split('\n')
+
+        for headerLine in headerLines:
+            includeMatch = USER_INCLUDE_MATCHER.findall(headerLine)
+            if includeMatch:
+                internalHeaderPath = os.path.abspath(os.path.join(os.path.dirname(headerPath), includeMatch[0]))
+                headerIncludes = headerIncludes.union(CollectSystemIncludes(internalHeaderPath, parsedHeaders))
+            includeMatch = SYSTEM_INCLUDE_MATCHER.findall(headerLine)
+            if includeMatch:
+                headerIncludes.add(includeMatch[0])
+
+        return headerIncludes
+
+def ParseHeader(headerPath, parsedHeaders = set()):
+    with open(headerPath, "r") as headerStream:
+        headerContent = headerStream.read().strip()
+        headerContent = re.sub(C_COMMENT_MATCHER, '', headerContent)
+
+        if PRAGMA_ONCE_MATCHER.search(headerContent) and headerPath in parsedHeaders:
+            return ""
+        
+        parsedHeaders.add(headerPath)
+        headerLines = headerContent.split('\n')
+
+        outputContent = ""
+        shouldSkipNextEmptyLines = True
+
+        for headerLine in headerLines:
+            if EMPTY_MATCHER.match(headerLine) and shouldSkipNextEmptyLines:
+                continue
+
+            if PRAGMA_ONCE_MATCHER.match(headerLine):
+                shouldSkipNextEmptyLines = True
+                continue
+        
+            includeMatch = USER_INCLUDE_MATCHER.findall(headerLine)
+            if includeMatch:
+                internalHeaderPath = os.path.abspath(os.path.join(os.path.dirname(headerPath), includeMatch[0]))
+                internalHeaderContent = ParseHeader(internalHeaderPath, parsedHeaders)
+
+                outputContent += internalHeaderContent
+                shouldSkipNextEmptyLines = True
+                continue
+            
+            includeMatch = SYSTEM_INCLUDE_MATCHER.findall(headerLine)
+            if includeMatch:
+                shouldSkipNextEmptyLines = True
+                continue
+
+            shouldSkipNextEmptyLines = False
+            outputContent += "{}\n".format(headerLine)
+
+        return "{}\n".format(outputContent)
+
+#
+#
+#
+
+inputHeaderPath = os.path.abspath(sys.argv[1])
+outputHeaderPath = os.path.abspath(sys.argv[2])
+
+os.makedirs(os.path.dirname(outputHeaderPath), exist_ok=True)
+
+with open(outputHeaderPath, "w") as outputHeaderStream:
+    licenseComment = CollectLicenseComment(inputHeaderPath)
+    systemIncludes = CollectSystemIncludes(inputHeaderPath)
+
+    outputHeaderStream.write("{}\n".format(licenseComment))
+    outputHeaderStream.write("\n")
+    
+    for systemInclude in sorted(systemIncludes):
+        outputHeaderStream.write("#include <{}>\n".format(systemInclude))
+    outputHeaderStream.write("\n")
+
+    outputHeaderStream.write(ParseHeader(inputHeaderPath).strip())
+    outputHeaderStream.write("\n")

.clang-tidy

@@ -4,6 +4,8 @@ Checks: '-*,
         bugprone-*,
         -bugprone-easily-swappable-parameters,
         -bugprone-forwarding-reference-overload,
+        -bugprone-lambda-function-name,
+        -bugprone-macro-parentheses,
 
         clang-analyzer-*,
 
@@ -11,6 +13,7 @@ Checks: '-*,
 
         cppcoreguidelines-*,
         -cppcoreguidelines-macro-usage,
+        -cppcoreguidelines-pro-bounds-array-to-pointer-decay,
         -cppcoreguidelines-pro-bounds-pointer-arithmetic,
 
         modernize-*,
@@ -22,7 +25,9 @@ Checks: '-*,
 
         readability-*,
         -readability-identifier-length,
+        -readability-named-parameter,
         -readability-redundant-access-specifiers,
+        -readability-simplify-boolean-expr,
         -readability-use-anyofallof,
         '
 ...

CMakeLists.txt

@@ -10,8 +10,6 @@ endif()
 project(meta.hpp)
 
 add_library(${PROJECT_NAME} INTERFACE)
-add_library(${PROJECT_NAME}::${PROJECT_NAME} ALIAS ${PROJECT_NAME})
-
 target_compile_features(${PROJECT_NAME} INTERFACE cxx_std_20)
 target_include_directories(${PROJECT_NAME} INTERFACE headers)
 
@@ -39,5 +37,6 @@ include(EnableGCov)
 include(EnableUBSan)
 
 add_subdirectory(manuals)
+add_subdirectory(singles)
 add_subdirectory(vendors)
 add_subdirectory(untests)

headers/meta.hpp/meta_base/bitflags.hpp

@@ -37,19 +37,19 @@ namespace meta_hpp::detail
             swap(flags_, other.flags_);
         }
 
-        constexpr explicit operator bool() const noexcept {
+        [[nodiscard]] constexpr explicit operator bool() const noexcept {
             return !!flags_;
         }
 
-        constexpr underlying_type as_raw() const noexcept {
+        [[nodiscard]] constexpr underlying_type as_raw() const noexcept {
             return flags_;
         }
 
-        constexpr enum_type as_enum() const noexcept {
+        [[nodiscard]] constexpr enum_type as_enum() const noexcept {
             return static_cast<enum_type>(flags_);
         }
 
-        constexpr bool has(bitflags flags) const noexcept {
+        [[nodiscard]] constexpr bool has(bitflags flags) const noexcept {
             return flags.flags_ == (flags_ & flags.flags_);
         }
 

singles/CMakeLists.txt

@@ -0,0 +1,30 @@
+project(meta.hpp.singles)
+
+#
+# generate
+#
+
+find_package(PythonInterp REQUIRED)
+
+set(META_ROOT_DIR "${CMAKE_CURRENT_SOURCE_DIR}/..")
+set(META_SINGLES_INPUT "${META_ROOT_DIR}/headers/meta.hpp/meta_all.hpp")
+set(META_SINGLES_OUTPUT "${META_ROOT_DIR}/singles/headers/meta.hpp/meta_all.hpp")
+file(GLOB_RECURSE META_SINGLES_DEPENDS "${META_ROOT_DIR}/headers/*.hpp")
+
+add_custom_command(OUTPUT "${META_SINGLES_OUTPUT}"
+    COMMAND "${PYTHON_EXECUTABLE}" ".ci/build_singles.py" "${META_SINGLES_INPUT}" "${META_SINGLES_OUTPUT}"
+    DEPENDS ${META_SINGLES_DEPENDS}
+    WORKING_DIRECTORY "${META_ROOT_DIR}")
+
+add_custom_target(${PROJECT_NAME}.generate
+    DEPENDS "${META_SINGLES_OUTPUT}")
+
+#
+# library
+#
+
+add_library(${PROJECT_NAME} INTERFACE)
+add_dependencies(${PROJECT_NAME} ${PROJECT_NAME}.generate)
+target_compile_features(${PROJECT_NAME} INTERFACE cxx_std_20)
+target_include_directories(${PROJECT_NAME} INTERFACE headers)
+target_link_libraries(${PROJECT_NAME} INTERFACE Threads::Threads)

untests/CMakeLists.txt

@@ -4,40 +4,77 @@ file(GLOB_RECURSE UNTESTS_SOURCES "*.cpp" "*.hpp")
 source_group(TREE ${CMAKE_CURRENT_SOURCE_DIR} FILES ${UNTESTS_SOURCES})
 
 add_executable(${PROJECT_NAME} ${UNTESTS_SOURCES})
-target_link_libraries(${PROJECT_NAME} PRIVATE meta.hpp doctest_with_main)
+target_link_libraries(${PROJECT_NAME} PRIVATE meta.hpp)
 
-if(${BUILD_WITH_COVERAGE})
-    target_link_libraries(${PROJECT_NAME} PRIVATE enable_gcov)
-endif()
+add_executable(${PROJECT_NAME}.singles ${UNTESTS_SOURCES})
+target_link_libraries(${PROJECT_NAME}.singles PRIVATE meta.hpp.singles)
 
-if(${BUILD_WITH_SANITIZERS})
-    target_link_libraries(${PROJECT_NAME} PRIVATE enable_asan enable_ubsan)
-endif()
+#
+# setup defines
+#
 
-target_compile_options(${PROJECT_NAME}
-    PRIVATE
-    $<$<CXX_COMPILER_ID:MSVC>:
-        /WX /W4>
-    PRIVATE
-    $<$<CXX_COMPILER_ID:GNU>:
-        -Werror -Wall -Wextra -Wpedantic>
-    PRIVATE
-    $<$<OR:$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:AppleClang>>:
-        -Werror -Weverything -Wconversion
-        -Wno-c++98-compat
-        -Wno-c++98-compat-pedantic
-        -Wno-exit-time-destructors
-        -Wno-global-constructors
-        -Wno-padded
-        -Wno-unknown-warning-option
-        -Wno-unneeded-internal-declaration
-        -Wno-unneeded-member-function
-        -Wno-unused-macros
-        -Wno-weak-vtables
-        >)
+function(setup_defines_for_target TARGET)
+    target_compile_definitions(${TARGET} PRIVATE
+        DOCTEST_CONFIG_INCLUDE_TYPE_TRAITS
+        DOCTEST_CONFIG_USE_STD_HEADERS)
+endfunction()
 
-target_compile_definitions(${PROJECT_NAME} PRIVATE
-    DOCTEST_CONFIG_INCLUDE_TYPE_TRAITS
-    DOCTEST_CONFIG_USE_STD_HEADERS)
+setup_defines_for_target(${PROJECT_NAME})
+setup_defines_for_target(${PROJECT_NAME}.singles)
+
+#
+# setup libraries
+#
+
+function(setup_libraries_for_target TARGET)
+    target_link_libraries(${TARGET} PRIVATE doctest_with_main)
+
+    if(${BUILD_WITH_COVERAGE})
+        target_link_libraries(${TARGET} PRIVATE enable_gcov)
+    endif()
+
+    if(${BUILD_WITH_SANITIZERS})
+        target_link_libraries(${TARGET} PRIVATE enable_asan enable_ubsan)
+    endif()
+endfunction()
+
+setup_libraries_for_target(${PROJECT_NAME})
+setup_libraries_for_target(${PROJECT_NAME}.singles)
+
+#
+# setup warnings
+#
+
+function(setup_warnings_for_target TARGET)
+    target_compile_options(${TARGET}
+        PRIVATE
+        $<$<CXX_COMPILER_ID:MSVC>:
+            /WX /W4>
+        PRIVATE
+        $<$<CXX_COMPILER_ID:GNU>:
+            -Werror -Wall -Wextra -Wpedantic>
+        PRIVATE
+        $<$<OR:$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:AppleClang>>:
+            -Werror -Weverything -Wconversion
+            -Wno-c++98-compat
+            -Wno-c++98-compat-pedantic
+            -Wno-exit-time-destructors
+            -Wno-global-constructors
+            -Wno-padded
+            -Wno-unknown-warning-option
+            -Wno-unneeded-internal-declaration
+            -Wno-unneeded-member-function
+            -Wno-unused-macros
+            -Wno-weak-vtables
+            >)
+endfunction()
+
+setup_warnings_for_target(${PROJECT_NAME})
+setup_warnings_for_target(${PROJECT_NAME}.singles)
+
+#
+# add tests
+#
 
 add_test(${PROJECT_NAME} ${PROJECT_NAME})
+add_test(${PROJECT_NAME} ${PROJECT_NAME}.singles)