allow to disable exceptions and RTTI manually

CMakeLists.txt

@@ -3,7 +3,11 @@ cmake_minimum_required(VERSION 3.21 FATAL_ERROR)
 project(meta.hpp
     VERSION "0.0.1"
     DESCRIPTION "C++20 tiny dynamic reflection library"
-    HOMEPAGE_URL "https://github.com/blackmatov/meta.hpp")
+    HOMEPAGE_URL "https://github.com/blackmatov/meta.hpp"
+    LANGUAGES CXX)
+
+option(META_HPP_NO_EXCEPTIONS "Don't use exceptions" OFF)
+option(META_HPP_NO_RTTI "Don't use RTTI" OFF)
 
 #
 # library
@@ -22,6 +26,10 @@ target_include_directories(${PROJECT_NAME} INTERFACE
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/headers>
     $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
 
+target_compile_definitions(${PROJECT_NAME} INTERFACE
+    $<$<BOOL:${META_HPP_NO_EXCEPTIONS}>:META_HPP_NO_EXCEPTIONS>
+    $<$<BOOL:${META_HPP_NO_RTTI}>:META_HPP_NO_RTTI>)
+
 find_package(Threads REQUIRED)
 target_link_libraries(${PROJECT_NAME} INTERFACE Threads::Threads)
 

develop/CMakeLists.txt

@@ -1,7 +1,7 @@
 option(BUILD_WITH_COVERAGE "Build with coverage" OFF)
 option(BUILD_WITH_SANITIZERS "Build with sanitizers" OFF)
-option(BUILD_WITH_NO_EXCEPTIONS "Build with no exceptions" OFF)
+option(BUILD_WITH_NO_EXCEPTIONS "Build with no exceptions" ${META_HPP_NO_EXCEPTIONS})
-option(BUILD_WITH_NO_RTTI "Build with no RTTI" OFF)
+option(BUILD_WITH_NO_RTTI "Build with no RTTI" ${META_HPP_NO_RTTI})
 
 enable_testing()
 set_property(GLOBAL PROPERTY USE_FOLDERS ON)

develop/singles/headers/meta.hpp/meta_all.hpp

@@ -30,22 +30,18 @@
 #include <variant>
 #include <vector>
 
-#if !defined(__cpp_exceptions)
+#if !defined(META_HPP_NO_EXCEPTIONS) && !defined(__cpp_exceptions)
 #  define META_HPP_NO_EXCEPTIONS
 #endif
 
-#if !defined(__cpp_rtti)
+#if !defined(META_HPP_NO_RTTI) && !defined(__cpp_rtti)
 #  define META_HPP_NO_RTTI
 #endif
 
-#if defined(META_HPP_NO_EXCEPTIONS)
+#if !defined(META_HPP_NO_EXCEPTIONS)
-#  define META_HPP_TRY if ( true )
+#endif
-#  define META_HPP_CATCH(e) if ( false )
+
-#  define META_HPP_RETHROW() std::abort()
+#if !defined(META_HPP_NO_RTTI)
-#else
-#  define META_HPP_TRY try
-#  define META_HPP_CATCH(e) catch(e)
-#  define META_HPP_RETHROW() throw
 #endif
 
 namespace meta_hpp::detail
@@ -287,6 +283,33 @@ namespace meta_hpp::detail
     using copy_cvref_t = typename copy_cvref<From, To>::type;
 }
 
+#if !defined(META_HPP_NO_EXCEPTIONS)
+#  define META_HPP_TRY try
+#  define META_HPP_CATCH(e) catch(e)
+#  define META_HPP_RETHROW() throw
+#  define META_HPP_THROW_AS(e, m) throw e{m}
+#else
+#  define META_HPP_TRY if ( true )
+#  define META_HPP_CATCH(e) if ( false )
+#  define META_HPP_RETHROW() std::abort()
+#  define META_HPP_THROW_AS(e, m) std::terminate()
+#endif
+
+namespace meta_hpp::detail
+{
+#if !defined(META_HPP_NO_EXCEPTIONS)
+    class exception final : public std::runtime_error {
+    public:
+        explicit exception(const char* what)
+        : std::runtime_error(what) {}
+    };
+#endif
+
+    inline void throw_exception_with [[noreturn]] ([[maybe_unused]] const char* what) {
+        META_HPP_THROW_AS(exception, what);
+    }
+}
+
 namespace meta_hpp::detail
 {
     template < typename Function >
@@ -954,6 +977,10 @@ namespace meta_hpp::detail
 
 namespace meta_hpp
 {
+#if !defined(META_HPP_NO_EXCEPTIONS)
+    using detail::exception;
+#endif
+
     using detail::hashed_string;
     using detail::memory_buffer;
 
@@ -966,27 +993,6 @@ namespace meta_hpp
     using detail::type_list;
 }
 
-namespace meta_hpp
-{
-    class exception final : public std::runtime_error {
-    public:
-        explicit exception(const char* what)
-        : std::runtime_error(what) {}
-    };
-
-    namespace detail
-    {
-        inline void throw_exception_with [[noreturn]] (const char* what) {
-        #if !defined(META_HPP_NO_EXCEPTIONS)
-            throw ::meta_hpp::exception(what);
-        #else
-            (void)what;
-            std::abort();
-        #endif
-        }
-    }
-}
-
 namespace meta_hpp
 {
     class uvalue;
@@ -3294,7 +3300,7 @@ namespace meta_hpp::detail
 
             return any_type{};
         }
-
+    #if !defined(META_HPP_NO_RTTI)
         [[nodiscard]] any_type get_type_by_rtti(const std::type_index& index) const noexcept {
             const locker lock;
 
@@ -3304,6 +3310,7 @@ namespace meta_hpp::detail
 
             return any_type{};
         }
+    #endif
     public:
         template < array_kind Array >
         [[nodiscard]] array_type resolve_type() { return resolve_array_type<Array>(); }
@@ -3487,7 +3494,9 @@ namespace meta_hpp::detail
     private:
         std::recursive_mutex mutex_;
         std::map<type_id, any_type, std::less<>> type_by_id_;
+    #if !defined(META_HPP_NO_RTTI)
         std::map<std::type_index, any_type, std::less<>> type_by_rtti_;
+    #endif
     };
 }
 

headers/meta.hpp/meta_base.hpp

@@ -10,6 +10,7 @@
 #include "meta_base/bitflags.hpp"
 #include "meta_base/cv_traits.hpp"
 #include "meta_base/cvref_traits.hpp"
+#include "meta_base/exceptions.hpp"
 #include "meta_base/fixed_function.hpp"
 #include "meta_base/hash_combiner.hpp"
 #include "meta_base/hashed_string.hpp"
@@ -26,6 +27,10 @@
 
 namespace meta_hpp
 {
+#if !defined(META_HPP_NO_EXCEPTIONS)
+    using detail::exception;
+#endif
+
     using detail::hashed_string;
     using detail::memory_buffer;
 
@@ -38,27 +43,6 @@ namespace meta_hpp
     using detail::type_list;
 }
 
-namespace meta_hpp
-{
-    class exception final : public std::runtime_error {
-    public:
-        explicit exception(const char* what)
-        : std::runtime_error(what) {}
-    };
-
-    namespace detail
-    {
-        inline void throw_exception_with [[noreturn]] (const char* what) {
-        #if !defined(META_HPP_NO_EXCEPTIONS)
-            throw ::meta_hpp::exception(what);
-        #else
-            (void)what;
-            std::abort();
-        #endif
-        }
-    }
-}
-
 namespace meta_hpp
 {
     class uvalue;

headers/meta.hpp/meta_base/base.hpp

@@ -6,6 +6,14 @@
 
 #pragma once
 
+#if !defined(META_HPP_NO_EXCEPTIONS) && !defined(__cpp_exceptions)
+#  define META_HPP_NO_EXCEPTIONS
+#endif
+
+#if !defined(META_HPP_NO_RTTI) && !defined(__cpp_rtti)
+#  define META_HPP_NO_RTTI
+#endif
+
 #include <cassert>
 #include <cstddef>
 #include <cstdint>
@@ -22,31 +30,19 @@
 #include <mutex>
 #include <set>
 #include <span>
-#include <stdexcept>
 #include <string_view>
 #include <string>
 #include <tuple>
 #include <type_traits>
-#include <typeindex>
-#include <typeinfo>
 #include <utility>
 #include <variant>
 #include <vector>
 
-#if !defined(__cpp_exceptions)
+#if !defined(META_HPP_NO_EXCEPTIONS)
-#  define META_HPP_NO_EXCEPTIONS
+#  include <stdexcept>
 #endif
 
-#if !defined(__cpp_rtti)
+#if !defined(META_HPP_NO_RTTI)
-#  define META_HPP_NO_RTTI
+#  include <typeindex>
-#endif
+#  include <typeinfo>
-
-#if defined(META_HPP_NO_EXCEPTIONS)
-#  define META_HPP_TRY if ( true )
-#  define META_HPP_CATCH(e) if ( false )
-#  define META_HPP_RETHROW() std::abort()
-#else
-#  define META_HPP_TRY try
-#  define META_HPP_CATCH(e) catch(e)
-#  define META_HPP_RETHROW() throw
 #endif

headers/meta.hpp/meta_base/exceptions.hpp

@@ -0,0 +1,36 @@
+/*******************************************************************************
+ * This file is part of the "https://github.com/blackmatov/meta.hpp"
+ * For conditions of distribution and use, see copyright notice in LICENSE.md
+ * Copyright (C) 2021-2023, by Matvey Cherevko (blackmatov@gmail.com)
+ ******************************************************************************/
+
+#pragma once
+
+#include "base.hpp"
+
+#if !defined(META_HPP_NO_EXCEPTIONS)
+#  define META_HPP_TRY try
+#  define META_HPP_CATCH(e) catch(e)
+#  define META_HPP_RETHROW() throw
+#  define META_HPP_THROW_AS(e, m) throw e{m}
+#else
+#  define META_HPP_TRY if ( true )
+#  define META_HPP_CATCH(e) if ( false )
+#  define META_HPP_RETHROW() std::abort()
+#  define META_HPP_THROW_AS(e, m) std::terminate()
+#endif
+
+namespace meta_hpp::detail
+{
+#if !defined(META_HPP_NO_EXCEPTIONS)
+    class exception final : public std::runtime_error {
+    public:
+        explicit exception(const char* what)
+        : std::runtime_error(what) {}
+    };
+#endif
+
+    inline void throw_exception_with [[noreturn]] ([[maybe_unused]] const char* what) {
+        META_HPP_THROW_AS(exception, what);
+    }
+}

headers/meta.hpp/meta_detail/type_registry.hpp

@@ -41,7 +41,7 @@ namespace meta_hpp::detail
 
             return any_type{};
         }
-
+    #if !defined(META_HPP_NO_RTTI)
         [[nodiscard]] any_type get_type_by_rtti(const std::type_index& index) const noexcept {
             const locker lock;
 
@@ -51,6 +51,7 @@ namespace meta_hpp::detail
 
             return any_type{};
         }
+    #endif
     public:
         template < array_kind Array >
         [[nodiscard]] array_type resolve_type() { return resolve_array_type<Array>(); }
@@ -234,6 +235,8 @@ namespace meta_hpp::detail
     private:
         std::recursive_mutex mutex_;
         std::map<type_id, any_type, std::less<>> type_by_id_;
+    #if !defined(META_HPP_NO_RTTI)
         std::map<std::type_index, any_type, std::less<>> type_by_rtti_;
+    #endif
     };
 }