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tomlplusplus/include/toml++/toml_preprocessor.h
Mark Gillard 5e683e9a73 fixed is_unicode_XXXXXX functions being wrong in some cases 
also:
- added tests for unicode functions
- changed `TOML_LIKELY` semantics to work with gcc-style intrinsics
- greatly improved unicode-related codegen
- parser refactoring
2020-04-18 23:42:33 +03:00

494 lines
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//# This file is a part of toml++ and is subject to the the terms of the MIT license.
//# Copyright (c) 2019-2020 Mark Gillard <mark.gillard@outlook.com.au>
//# See https://github.com/marzer/tomlplusplus/blob/master/LICENSE for the full license text.
// SPDX-License-Identifier: MIT
#pragma once
// clang-format off
////////// CONFIGURATION
#ifdef TOML_CONFIG_HEADER
#include TOML_CONFIG_HEADER
#endif
#if !defined(TOML_ALL_INLINE) || (defined(TOML_ALL_INLINE) && TOML_ALL_INLINE)
#undef TOML_ALL_INLINE
#define TOML_ALL_INLINE 1
#endif
#if defined(TOML_IMPLEMENTATION) || TOML_ALL_INLINE || defined(__INTELLISENSE__)
#undef TOML_IMPLEMENTATION
#define TOML_IMPLEMENTATION 1
#else
#define TOML_IMPLEMENTATION 0
#endif
#ifndef TOML_API
#define TOML_API
#endif
#ifndef TOML_CHAR_8_STRINGS
#define TOML_CHAR_8_STRINGS 0
#endif
#ifndef TOML_UNRELEASED_FEATURES
#define TOML_UNRELEASED_FEATURES 0
#endif
#ifndef TOML_LARGE_FILES
#define TOML_LARGE_FILES 0
#endif
#ifndef TOML_UNDEF_MACROS
#define TOML_UNDEF_MACROS 1
#endif
#ifndef TOML_PARSER
#define TOML_PARSER 1
#endif
////////// COMPILER & ENVIRONMENT
#ifndef TOML_DOXYGEN
#define TOML_DOXYGEN 0
#endif
#ifndef __cplusplus
#error toml++ is a C++ library.
#endif
#ifdef __clang__
#define TOML_PUSH_WARNINGS _Pragma("clang diagnostic push")
#define TOML_DISABLE_SWITCH_WARNINGS _Pragma("clang diagnostic ignored \"-Wswitch\"")
#define TOML_DISABLE_INIT_WARNINGS _Pragma("clang diagnostic ignored \"-Wmissing-field-initializers\"")
#define TOML_DISABLE_VTABLE_WARNINGS _Pragma("clang diagnostic ignored \"-Weverything\"") \
_Pragma("clang diagnostic ignored \"-Wweak-vtables\"")
#define TOML_DISABLE_PADDING_WARNINGS _Pragma("clang diagnostic ignored \"-Wpadded\"")
#define TOML_DISABLE_FLOAT_WARNINGS _Pragma("clang diagnostic ignored \"-Wfloat-equal\"") \
_Pragma("clang diagnostic ignored \"-Wdouble-promotion\"")
#define TOML_DISABLE_SHADOW_WARNINGS _Pragma("clang diagnostic ignored \"-Wshadow\"")
#define TOML_DISABLE_ALL_WARNINGS _Pragma("clang diagnostic ignored \"-Weverything\"")
#define TOML_POP_WARNINGS _Pragma("clang diagnostic pop")
#define TOML_ASSUME(cond) __builtin_assume(cond)
#define TOML_UNREACHABLE __builtin_unreachable()
#define TOML_GNU_ATTR(...) __attribute__((__VA_ARGS__))
#if defined(_MSC_VER) // msvc compat mode
#ifdef __has_declspec_attribute
#if __has_declspec_attribute(novtable)
#define TOML_INTERFACE __declspec(novtable)
#endif
#if __has_declspec_attribute(empty_bases)
#define TOML_EMPTY_BASES __declspec(empty_bases)
#endif
#define TOML_ALWAYS_INLINE __forceinline
#endif
#endif
#ifdef __has_attribute
#if !defined(TOML_ALWAYS_INLINE) && __has_attribute(always_inline)
#define TOML_ALWAYS_INLINE __attribute__((__always_inline__)) inline
#endif
#if !defined(TOML_TRIVIAL_ABI) && __has_attribute(trivial_abi)
#define TOML_TRIVIAL_ABI __attribute__((__trivial_abi__))
#endif
#endif
#ifdef __EXCEPTIONS
#define TOML_COMPILER_EXCEPTIONS 1
#else
#define TOML_COMPILER_EXCEPTIONS 0
#endif
#define TOML_LIKELY(...) (__builtin_expect(!!(__VA_ARGS__), 1) )
#define TOML_UNLIKELY(...) (__builtin_expect(!!(__VA_ARGS__), 0) )
//floating-point from_chars and to_chars are not implemented in any version of clang as of 1/1/2020
#ifndef TOML_FLOAT_CHARCONV
#define TOML_FLOAT_CHARCONV 0
#endif
#elif defined(_MSC_VER) || (defined(__INTEL_COMPILER) && defined(__ICL))
#define TOML_CPP_VERSION _MSVC_LANG
#define TOML_PUSH_WARNINGS __pragma(warning(push))
#define TOML_DISABLE_SWITCH_WARNINGS __pragma(warning(disable: 4063))
#define TOML_DISABLE_ALL_WARNINGS __pragma(warning(pop)) \
__pragma(warning(push, 0))
#define TOML_POP_WARNINGS __pragma(warning(pop))
#define TOML_ALWAYS_INLINE __forceinline
#define TOML_ASSUME(cond) __assume(cond)
#define TOML_UNREACHABLE __assume(0)
#define TOML_INTERFACE __declspec(novtable)
#define TOML_EMPTY_BASES __declspec(empty_bases)
#if !defined(TOML_RELOPS_REORDERING) && defined(__cpp_impl_three_way_comparison)
#define TOML_RELOPS_REORDERING 1
#endif
#ifdef _CPPUNWIND
#define TOML_COMPILER_EXCEPTIONS 1
#else
#define TOML_COMPILER_EXCEPTIONS 0
#endif
#elif defined(__GNUC__)
#define TOML_PUSH_WARNINGS _Pragma("GCC diagnostic push")
#define TOML_DISABLE_SWITCH_WARNINGS _Pragma("GCC diagnostic ignored \"-Wswitch\"") \
_Pragma("GCC diagnostic ignored \"-Wswitch-enum\"") \
_Pragma("GCC diagnostic ignored \"-Wswitch-default\"")
#define TOML_DISABLE_INIT_WARNINGS _Pragma("GCC diagnostic ignored \"-Wmissing-field-initializers\"") \
_Pragma("GCC diagnostic ignored \"-Wmaybe-uninitialized\"") \
_Pragma("GCC diagnostic ignored \"-Wuninitialized\"")
#define TOML_DISABLE_PADDING_WARNINGS _Pragma("GCC diagnostic ignored \"-Wpadded\"")
#define TOML_DISABLE_FLOAT_WARNINGS _Pragma("GCC diagnostic ignored \"-Wfloat-equal\"")
#define TOML_DISABLE_SHADOW_WARNINGS _Pragma("GCC diagnostic ignored \"-Wshadow\"")
#define TOML_DISABLE_ALL_WARNINGS _Pragma("GCC diagnostic ignored \"-Wall\"") \
_Pragma("GCC diagnostic ignored \"-Wextra\"") \
_Pragma("GCC diagnostic ignored \"-Wchar-subscripts\"") \
_Pragma("GCC diagnostic ignored \"-Wtype-limits\"") \
TOML_DISABLE_SWITCH_WARNINGS \
TOML_DISABLE_INIT_WARNINGS \
TOML_DISABLE_PADDING_WARNINGS \
TOML_DISABLE_FLOAT_WARNINGS \
TOML_DISABLE_SHADOW_WARNINGS
#define TOML_POP_WARNINGS _Pragma("GCC diagnostic pop")
#define TOML_GNU_ATTR(...) __attribute__((__VA_ARGS__))
#define TOML_ALWAYS_INLINE __attribute__((__always_inline__)) inline
#define TOML_UNREACHABLE __builtin_unreachable()
#if !defined(TOML_RELOPS_REORDERING) && defined(__cpp_impl_three_way_comparison)
#define TOML_RELOPS_REORDERING 1
#endif
#ifdef __cpp_exceptions
#define TOML_COMPILER_EXCEPTIONS 1
#else
#define TOML_COMPILER_EXCEPTIONS 0
#endif
#define TOML_LIKELY(...) (__builtin_expect(!!(__VA_ARGS__), 1) )
#define TOML_UNLIKELY(...) (__builtin_expect(!!(__VA_ARGS__), 0) )
// floating-point from_chars and to_chars are not implemented in any version of gcc as of 1/1/2020
#ifndef TOML_FLOAT_CHARCONV
#define TOML_FLOAT_CHARCONV 0
#endif
#endif
#ifndef TOML_CPP_VERSION
#define TOML_CPP_VERSION __cplusplus
#endif
#if TOML_CPP_VERSION < 201103L
#error toml++ requires C++17 or higher. For a TOML library supporting pre-C++11 see https://github.com/ToruNiina/Boost.toml
#elif TOML_CPP_VERSION < 201703L
#error toml++ requires C++17 or higher. For a TOML library supporting C++11 see https://github.com/skystrife/cpptoml
#elif TOML_CPP_VERSION >= 202600L
#define TOML_CPP 26
#elif TOML_CPP_VERSION >= 202300L
#define TOML_CPP 23
#elif TOML_CPP_VERSION >= 202002L
#define TOML_CPP 20
#elif TOML_CPP_VERSION >= 201703L
#define TOML_CPP 17
#endif
#ifndef TOML_COMPILER_EXCEPTIONS
#define TOML_COMPILER_EXCEPTIONS 1
#endif
#if TOML_COMPILER_EXCEPTIONS
#ifndef TOML_EXCEPTIONS
#define TOML_EXCEPTIONS 1
#endif
#else
#if defined(TOML_EXCEPTIONS) && TOML_EXCEPTIONS
#error TOML_EXCEPTIONS was explicitly enabled but exceptions are disabled/unsupported by the compiler.
#endif
#undef TOML_EXCEPTIONS
#define TOML_EXCEPTIONS 0
#endif
#if TOML_EXCEPTIONS
#define TOML_MAY_THROW
#else
#define TOML_MAY_THROW noexcept
#endif
#ifndef TOML_INT_CHARCONV
#define TOML_INT_CHARCONV 1
#endif
#ifndef TOML_FLOAT_CHARCONV
#define TOML_FLOAT_CHARCONV 1
#endif
#if (TOML_INT_CHARCONV || TOML_FLOAT_CHARCONV) && !__has_include(<charconv>)
#undef TOML_INT_CHARCONV
#undef TOML_FLOAT_CHARCONV
#define TOML_INT_CHARCONV 0
#define TOML_FLOAT_CHARCONV 0
#endif
#ifndef TOML_PUSH_WARNINGS
#define TOML_PUSH_WARNINGS
#endif
#ifndef TOML_DISABLE_SWITCH_WARNINGS
#define TOML_DISABLE_SWITCH_WARNINGS
#endif
#ifndef TOML_DISABLE_INIT_WARNINGS
#define TOML_DISABLE_INIT_WARNINGS
#endif
#ifndef TOML_DISABLE_VTABLE_WARNINGS
#define TOML_DISABLE_VTABLE_WARNINGS
#endif
#ifndef TOML_DISABLE_PADDING_WARNINGS
#define TOML_DISABLE_PADDING_WARNINGS
#endif
#ifndef TOML_DISABLE_FLOAT_WARNINGS
#define TOML_DISABLE_FLOAT_WARNINGS
#endif
#ifndef TOML_DISABLE_SHADOW_WARNINGS
#define TOML_DISABLE_SHADOW_WARNINGS
#endif
#ifndef TOML_DISABLE_ALL_WARNINGS
#define TOML_DISABLE_ALL_WARNINGS
#endif
#ifndef TOML_POP_WARNINGS
#define TOML_POP_WARNINGS
#endif
#ifndef TOML_GNU_ATTR
#define TOML_GNU_ATTR(...)
#endif
#ifndef TOML_INTERFACE
#define TOML_INTERFACE
#endif
#ifndef TOML_EMPTY_BASES
#define TOML_EMPTY_BASES
#endif
#ifndef TOML_ALWAYS_INLINE
#define TOML_ALWAYS_INLINE inline
#endif
#ifndef TOML_ASSUME
#define TOML_ASSUME(cond) (void)0
#endif
#ifndef TOML_UNREACHABLE
#define TOML_UNREACHABLE TOML_ASSERT(false)
#endif
#define TOML_NO_DEFAULT_CASE default: TOML_UNREACHABLE
#ifdef __cpp_consteval
#define TOML_CONSTEVAL consteval
#else
#define TOML_CONSTEVAL constexpr
#endif
#if !TOML_DOXYGEN && !defined(__INTELLISENSE__)
#if !defined(TOML_LIKELY) && __has_cpp_attribute(likely)
#define TOML_LIKELY(...) (__VA_ARGS__) [[likely]]
#endif
#if !defined(TOML_UNLIKELY) && __has_cpp_attribute(unlikely)
#define TOML_UNLIKELY(...) (__VA_ARGS__) [[unlikely]]
#endif
#if __has_cpp_attribute(nodiscard) >= 201907L
#define TOML_NODISCARD_CTOR [[nodiscard]]
#endif
#endif
#ifndef TOML_LIKELY
#define TOML_LIKELY(...) (__VA_ARGS__)
#endif
#ifndef TOML_UNLIKELY
#define TOML_UNLIKELY(...) (__VA_ARGS__)
#endif
#ifndef TOML_NODISCARD_CTOR
#define TOML_NODISCARD_CTOR
#endif
#ifndef TOML_TRIVIAL_ABI
#define TOML_TRIVIAL_ABI
#endif
#ifndef TOML_RELOPS_REORDERING
#define TOML_RELOPS_REORDERING 0
#endif
#if TOML_RELOPS_REORDERING
#define TOML_ASYMMETRICAL_EQUALITY_OPS(...)
#else
#define TOML_ASYMMETRICAL_EQUALITY_OPS(LHS, RHS, ...) \
__VA_ARGS__ [[nodiscard]] friend bool operator == (RHS rhs, LHS lhs) noexcept { return lhs == rhs; } \
__VA_ARGS__ [[nodiscard]] friend bool operator != (LHS lhs, RHS rhs) noexcept { return !(lhs == rhs); } \
__VA_ARGS__ [[nodiscard]] friend bool operator != (RHS rhs, LHS lhs) noexcept { return !(lhs == rhs); }
#endif
#if TOML_ALL_INLINE
#define TOML_EXTERNAL_LINKAGE inline
#define TOML_INTERNAL_LINKAGE inline
#define TOML_INTERNAL_NAMESPACE toml::impl
#else
#define TOML_EXTERNAL_LINKAGE
#define TOML_INTERNAL_LINKAGE static
#define TOML_INTERNAL_NAMESPACE
#endif
#include "toml_version.h"
//# {{
#define TOML_LIB_SINGLE_HEADER 0
//# }}
#define TOML_MAKE_VERSION(maj, min, rev) \
((maj) * 1000 + (min) * 25 + (rev))
#if TOML_UNRELEASED_FEATURES
#define TOML_LANG_EFFECTIVE_VERSION \
TOML_MAKE_VERSION(TOML_LANG_MAJOR, TOML_LANG_MINOR, TOML_LANG_PATCH+1)
#else
#define TOML_LANG_EFFECTIVE_VERSION \
TOML_MAKE_VERSION(TOML_LANG_MAJOR, TOML_LANG_MINOR, TOML_LANG_PATCH)
#endif
#define TOML_LANG_HIGHER_THAN(maj, min, rev) \
(TOML_LANG_EFFECTIVE_VERSION > TOML_MAKE_VERSION(maj, min, rev))
#define TOML_LANG_AT_LEAST(maj, min, rev) \
(TOML_LANG_EFFECTIVE_VERSION >= TOML_MAKE_VERSION(maj, min, rev))
#define TOML_LANG_UNRELEASED \
TOML_LANG_HIGHER_THAN(TOML_LANG_MAJOR, TOML_LANG_MINOR, TOML_LANG_PATCH)
#if TOML_DOXYGEN || defined(__INTELLISENSE__)
#define TOML_ABI_NAMESPACES 0
#define TOML_ABI_NAMESPACE_START(name)
#define TOML_ABI_NAMESPACE_END
#else
#define TOML_ABI_NAMESPACES 1
#define TOML_ABI_NAMESPACE_START(name) inline namespace abi_##name {
#define TOML_ABI_NAMESPACE_END }
#endif
TOML_PUSH_WARNINGS
TOML_DISABLE_ALL_WARNINGS
#ifndef TOML_ASSERT
#ifdef NDEBUG
#define TOML_ASSERT(expr) (void)0
#else
#include <cassert>
#define TOML_ASSERT(expr) assert(expr)
#endif
#endif
TOML_POP_WARNINGS
#if TOML_CHAR_8_STRINGS
#define TOML_STRING_PREFIX_1(S) u8##S
#define TOML_STRING_PREFIX(S) TOML_STRING_PREFIX_1(S)
#else
#define TOML_STRING_PREFIX(S) S
#endif
//# {{
#if TOML_DOXYGEN
/// \addtogroup configuration Library Configuration
/// \brief Preprocessor macros for configuring library functionality.
/// \detail Define these before including `toml++` to alter the way it functions.
/// \remarks Some of these options have ABI implications; inline namespaces are used to prevent
/// you from trying to link incompatible combinations together.
/// @{
/// \def TOML_ALL_INLINE
/// \brief Sets whether the library is entirely inline.
/// \detail Defaults to `1`.
/// \remark Disabling this means that you must define `TOML_IMPLEMENTATION` in
/// <strong><em>exactly one</em></strong> translation unit in your project:
/// \cpp
/// // global_header_that_includes_toml++.h
/// #define TOML_ALL_INLINE 0
/// #include <toml.hpp>
///
/// // some_code_file.cpp
/// #define TOML_IMPLEMENTATION
/// #include "global_header_that_includes_toml++.h"
/// \ecpp
#define TOML_API
/// \def TOML_API
/// \brief An annotation to add to public symbols.
/// \detail Not defined by default.
/// \remark You'd override this with `__declspec(dllexport)` if you were building the library
/// into the public API of a DLL on Windows.
/// \def TOML_ASSERT(expr)
/// \brief Sets the assert function used by the library.
/// \detail Defaults to the standard C `assert()`.
/// \def TOML_CHAR_8_STRINGS
/// \brief Uses C++20 char8_t-based strings as the toml string data type.
/// \detail Defaults to `0`.
#define TOML_CONFIG_HEADER
/// \def TOML_CONFIG_HEADER
/// \brief An additional header to include before any other `toml++` header files.
/// \detail Not defined by default.
/// \def TOML_EXCEPTIONS
/// \brief Sets whether the library uses exceptions to report parsing failures.
/// \detail Defaults to `1` or `0` according to your compiler's exception mode.
/// \def TOML_IMPLEMENTATION
/// \brief Enables the library's implementation when #TOML_ALL_INLINE is enabled.
/// \detail Not defined by default. Meaningless when #TOML_ALL_INLINE is disabled.
/// \def TOML_LARGE_FILES
/// \brief Sets whether line and column indices are 32-bit integers.
/// \detail Defaults to `0`.
/// \see toml::source_index
#define TOML_OPTIONAL_TYPE
/// \def TOML_OPTIONAL_TYPE
/// \brief Overrides the `optional<T>` type used by the library.
/// \detail Not defined by default (use std::optional).
/// \warning The library uses optionals internally in a few places; if you choose to replace the optional type
/// it must be with something that is still API-compatible with std::optional
/// (e.g. [tl::optional](https://github.com/TartanLlama/optional)).
/// \def TOML_PARSER
/// \brief Sets whether the parser-related parts of the library are included.
/// \detail Defaults to `1`.
/// \remarks If you don't need to parse TOML data from any strings or files (e.g. you're only using the library to
/// serialize data as TOML), setting `TOML_PARSER` to `0` can yield decent compilation speed improvements.
#define TOML_SMALL_FLOAT_TYPE
/// \def TOML_SMALL_FLOAT_TYPE
/// \brief If your codebase has an additional 'small' float type (e.g. half-precision), this tells toml++ about it.
/// \detail Not defined by default.
#define TOML_SMALL_INT_TYPE
/// \def TOML_SMALL_INT_TYPE
/// \brief If your codebase has an additional 'small' integer type (e.g. 24-bits), this tells toml++ about it.
/// \detail Not defined by default.
/// \def TOML_UNRELEASED_FEATURES
/// \brief Enables support for unreleased TOML language features not yet part of a
/// [numbered version](https://github.com/toml-lang/toml/releases).
/// \detail Defaults to `0`.
/// \see [TOML Language Support](https://github.com/marzer/tomlplusplus/blob/master/README.md#toml-language-support)
/// @}
#endif // TOML_DOXYGEN
//# }}
// clang-format on
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