954 lines
35 KiB
C++
954 lines
35 KiB
C++
//# This file is a part of toml++ and is subject to the the terms of the MIT license.
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//# Copyright (c) 2019-2020 Mark Gillard <mark.gillard@outlook.com.au>
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//# See https://github.com/marzer/tomlplusplus/blob/master/LICENSE for the full license text.
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// SPDX-License-Identifier: MIT
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#pragma once
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#include "toml_preprocessor.h"
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//#====================================================================================================================
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//# INCLUDES
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//#====================================================================================================================
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TOML_DISABLE_WARNINGS
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#include <cstdint>
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#include <cstddef>
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#include <cstring>
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#include <cfloat>
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#include <climits>
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#include <limits>
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#include <memory>
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#include <string_view>
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#include <string>
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#include <vector>
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#include <map>
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#include <iosfwd>
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#if !TOML_HAS_CUSTOM_OPTIONAL_TYPE
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#include <optional>
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#endif
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#if TOML_HAS_INCLUDE(<version>)
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#include <version>
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#endif
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TOML_ENABLE_WARNINGS
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#ifdef __cpp_lib_launder
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#define TOML_LAUNDER(x) std::launder(x)
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#else
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#define TOML_LAUNDER(x) x
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#endif
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//#====================================================================================================================
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//# ENVIRONMENT GROUND-TRUTHS
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//#====================================================================================================================
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#ifndef DOXYGEN
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#ifndef TOML_DISABLE_ENVIRONMENT_CHECKS
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#define TOML_ENV_MESSAGE \
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"If you're seeing this error it's because you're building toml++ for an environment that doesn't conform to " \
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"one of the 'ground truths' assumed by the library. Essentially this just means that I don't have the " \
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"resources to test on more platforms, but I wish I did! You can try disabling the checks by defining " \
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"TOML_DISABLE_ENVIRONMENT_CHECKS, but your mileage may vary. Please consider filing an issue at " \
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"https://github.com/marzer/tomlplusplus/issues to help me improve support for your target environment. Thanks!"
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static_assert(CHAR_BIT == 8, TOML_ENV_MESSAGE);
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static_assert(FLT_RADIX == 2, TOML_ENV_MESSAGE);
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static_assert('A' == 65, TOML_ENV_MESSAGE);
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static_assert(sizeof(double) == 8, TOML_ENV_MESSAGE);
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static_assert(std::numeric_limits<double>::is_iec559, TOML_ENV_MESSAGE);
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static_assert(std::numeric_limits<double>::digits == 53, TOML_ENV_MESSAGE);
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static_assert(std::numeric_limits<double>::digits10 == 15, TOML_ENV_MESSAGE);
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#undef TOML_ENV_MESSAGE
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#endif // !TOML_DISABLE_ENVIRONMENT_CHECKS
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#endif // !DOXYGEN
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//#====================================================================================================================
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//# UNDOCUMENTED TYPEDEFS AND FORWARD DECLARATIONS
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//#====================================================================================================================
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#ifndef DOXYGEN // undocumented forward declarations are hidden from doxygen because they fuck it up =/
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namespace toml // non-abi namespace; this is not an error
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{
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using namespace std::string_literals;
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using namespace std::string_view_literals;
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using ::std::size_t;
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using ::std::intptr_t;
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using ::std::uintptr_t;
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using ::std::ptrdiff_t;
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using ::std::nullptr_t;
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using ::std::int8_t;
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using ::std::int16_t;
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using ::std::int32_t;
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using ::std::int64_t;
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using ::std::uint8_t;
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using ::std::uint16_t;
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using ::std::uint32_t;
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using ::std::uint64_t;
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using ::std::uint_least32_t;
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using ::std::uint_least64_t;
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// legacy typedefs
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using string_char = char;
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using string = std::string;
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using string_view = std::string_view;
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}
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TOML_NAMESPACE_START // abi namespace
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{
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struct date;
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struct time;
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struct time_offset;
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TOML_ABI_NAMESPACE_BOOL(TOML_HAS_CUSTOM_OPTIONAL_TYPE, custopt, stdopt)
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struct date_time;
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TOML_ABI_NAMESPACE_END
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class node;
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class array;
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class table;
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template <typename> class node_view;
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template <typename> class value;
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template <typename> class default_formatter;
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template <typename> class json_formatter;
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[[nodiscard]] TOML_API bool operator == (const array& lhs, const array& rhs) noexcept;
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[[nodiscard]] TOML_API bool operator != (const array& lhs, const array& rhs) noexcept;
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[[nodiscard]] TOML_API bool operator == (const table& lhs, const table& rhs) noexcept;
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[[nodiscard]] TOML_API bool operator != (const table& lhs, const table& rhs) noexcept;
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template <typename Char>
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std::basic_ostream<Char>& operator << (std::basic_ostream<Char>&, const array&);
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template <typename Char, typename T>
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std::basic_ostream<Char>& operator << (std::basic_ostream<Char>&, const value<T>&);
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template <typename Char>
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std::basic_ostream<Char>& operator << (std::basic_ostream<Char>&, const table&);
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template <typename T, typename U>
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std::basic_ostream<T>& operator << (std::basic_ostream<T>&, default_formatter<U>&);
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template <typename T, typename U>
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std::basic_ostream<T>& operator << (std::basic_ostream<T>&, default_formatter<U>&&);
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template <typename T, typename U>
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std::basic_ostream<T>& operator << (std::basic_ostream<T>&, json_formatter<U>&);
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template <typename T, typename U>
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std::basic_ostream<T>& operator << (std::basic_ostream<T>&, json_formatter<U>&&);
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template <typename Char, typename T>
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inline std::basic_ostream<Char>& operator << (std::basic_ostream<Char>&, const node_view<T>&);
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namespace impl
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{
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template <typename T>
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using string_map = std::map<std::string, T, std::less<>>; // heterogeneous lookup
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template <typename T>
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using remove_cvref_t = std::remove_cv_t<std::remove_reference_t<T>>;
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template <typename T, typename... U>
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inline constexpr bool is_one_of = (false || ... || std::is_same_v<T, U>);
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template <typename T>
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inline constexpr bool is_cvref = std::is_reference_v<T> || std::is_const_v<T> || std::is_volatile_v<T>;
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template <typename T>
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inline constexpr bool is_wide_string = is_one_of<
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std::decay_t<T>,
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const wchar_t*,
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wchar_t*,
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std::wstring_view,
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std::wstring
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>;
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template <typename T>
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inline constexpr bool dependent_false = false;
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#if TOML_WINDOWS_COMPAT
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[[nodiscard]] TOML_API std::string narrow(std::wstring_view) noexcept;
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[[nodiscard]] TOML_API std::wstring widen(std::string_view) noexcept;
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#ifdef __cpp_lib_char8_t
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[[nodiscard]] TOML_API std::wstring widen(std::u8string_view) noexcept;
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#endif
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#endif // TOML_WINDOWS_COMPAT
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#if TOML_ABI_NAMESPACES
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#if TOML_EXCEPTIONS
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TOML_ABI_NAMESPACE_START(ex)
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#define TOML_PARSER_TYPENAME TOML_NAMESPACE::impl::ex::parser
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#else
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TOML_ABI_NAMESPACE_START(noex)
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#define TOML_PARSER_TYPENAME TOML_NAMESPACE::impl::noex::parser
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#endif
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#else
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#define TOML_PARSER_TYPENAME TOML_NAMESPACE::impl::parser
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#endif
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class parser;
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TOML_ABI_NAMESPACE_END // TOML_EXCEPTIONS
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}
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}
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TOML_NAMESPACE_END
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#endif // !DOXYGEN
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//#====================================================================================================================
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//# TYPEDEFS AND FORWARD DECLARATIONS
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//#====================================================================================================================
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/// \brief The root namespace for all toml++ functions and types.
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namespace toml { }
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TOML_NAMESPACE_START // abi namespace
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{
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/// \brief Convenience literal operators for working with toml++.
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///
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/// \detail This namespace exists so you can safely hoist the toml++ literal operators into another scope
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/// without dragging in everything from the toml namespace: \cpp
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///
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/// #include <toml++/toml.h>
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/// using namespace toml::literals;
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///
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/// int main()
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/// {
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/// toml::table tbl = "vals = [1, 2, 3]"_toml;
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///
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/// // ... do stuff with the table generated by the "_toml" literal ...
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///
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/// return 0;
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/// }
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/// \ecpp
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///
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inline namespace literals {}
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#if TOML_HAS_CUSTOM_OPTIONAL_TYPE
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template <typename T>
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using optional = TOML_OPTIONAL_TYPE<T>;
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#else
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/// \brief The 'optional' type used throughout the library.
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///
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/// \remarks By default this will be an alias for std::optional, but you can change the optional type
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/// used by the library by defining #TOML_OPTIONAL_TYPE.
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template <typename T>
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using optional = std::optional<T>;
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#endif
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/// \brief TOML node type identifiers.
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enum class node_type : uint8_t
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{
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none, ///< Not-a-node.
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table, ///< The node is a toml::table.
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array, ///< The node is a toml::array.
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string, ///< The node is a toml::value<std::string>.
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integer, ///< The node is a toml::value<int64_t>.
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floating_point, ///< The node is a toml::value<double>.
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boolean, ///< The node is a toml::value<bool>.
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date, ///< The node is a toml::value<date>.
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time, ///< The node is a toml::value<time>.
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date_time ///< The node is a toml::value<date_time>.
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};
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/// \brief A pointer to a shared string resource containing a source path.
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using source_path_ptr = std::shared_ptr<const std::string>;
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/// \brief Helper class for suppressing move-construction in single-argument array constructors.
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///
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/// \detail \cpp
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/// // desired result: [ [ 42 ] ]
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/// auto bad = toml::array{ toml::array{ 42 } }
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/// auto good = toml::array{ toml::inserter{ toml::array{ 42 } } }
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/// std::cout << "bad: " << bad << "\n";
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/// std::cout << "good:" << good << "\n";
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/// \ecpp
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///
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/// \out
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/// bad: [ 42 ]
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/// good: [ [ 42 ] ]
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/// \eout
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///
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/// \see toml::array
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template <typename T>
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struct TOML_TRIVIAL_ABI inserter
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{
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T&& value;
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};
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template <typename T> inserter(T&&) -> inserter<T>;
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}
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TOML_NAMESPACE_END
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//#====================================================================================================================
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//# VALUE AND NODE TRAITS
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//#====================================================================================================================
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TOML_IMPL_NAMESPACE_START
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{
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// general value traits
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// (as they relate to their equivalent native TOML type)
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template <typename T>
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struct value_traits
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{
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using native_type = void;
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static constexpr bool is_native = false;
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static constexpr bool is_losslessly_convertible_to_native = false;
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static constexpr bool can_represent_native = false;
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static constexpr bool can_partially_represent_native = false;
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static constexpr auto type = node_type::none;
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};
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template <typename T> struct value_traits<T&> : value_traits<T> {};
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template <typename T> struct value_traits<T&&> : value_traits<T> {};
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template <typename T> struct value_traits<T* const> : value_traits<T*> {};
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template <typename T> struct value_traits<T* volatile> : value_traits<T*> {};
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template <typename T> struct value_traits<T* const volatile> : value_traits<T*> {};
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// integer value traits
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template <typename T>
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struct integer_value_limits
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{
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static constexpr auto min = (std::numeric_limits<T>::min)();
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static constexpr auto max = (std::numeric_limits<T>::max)();
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};
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template <typename T>
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struct integer_value_traits_base : integer_value_limits<T>
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{
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using native_type = int64_t;
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static constexpr bool is_native = std::is_same_v<T, native_type>;
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static constexpr bool is_signed = static_cast<T>(-1) < T{}; // for impls not specializing std::is_signed<T>
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static constexpr auto type = node_type::integer;
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static constexpr bool can_partially_represent_native = true;
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};
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template <typename T>
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struct unsigned_integer_value_traits : integer_value_traits_base<T>
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{
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static constexpr bool is_losslessly_convertible_to_native
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= integer_value_limits<T>::max <= 9223372036854775807ULL;
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static constexpr bool can_represent_native = false;
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};
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template <typename T>
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struct signed_integer_value_traits : integer_value_traits_base<T>
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{
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using native_type = int64_t;
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static constexpr bool is_losslessly_convertible_to_native
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= integer_value_limits<T>::min >= (-9223372036854775807LL - 1LL)
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&& integer_value_limits<T>::max <= 9223372036854775807LL;
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static constexpr bool can_represent_native
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= integer_value_limits<T>::min <= (-9223372036854775807LL - 1LL)
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&& integer_value_limits<T>::max >= 9223372036854775807LL;
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};
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template <typename T, bool S = integer_value_traits_base<T>::is_signed>
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struct integer_value_traits : signed_integer_value_traits<T> {};
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template <typename T>
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struct integer_value_traits<T, false> : unsigned_integer_value_traits<T> {};
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template <> struct value_traits<signed char> : integer_value_traits<signed char> {};
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template <> struct value_traits<unsigned char> : integer_value_traits<unsigned char> {};
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template <> struct value_traits<signed short> : integer_value_traits<signed short> {};
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template <> struct value_traits<unsigned short> : integer_value_traits<unsigned short> {};
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template <> struct value_traits<signed int> : integer_value_traits<signed int> {};
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template <> struct value_traits<unsigned int> : integer_value_traits<unsigned int> {};
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template <> struct value_traits<signed long> : integer_value_traits<signed long> {};
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template <> struct value_traits<unsigned long> : integer_value_traits<unsigned long> {};
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template <> struct value_traits<signed long long> : integer_value_traits<signed long long> {};
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template <> struct value_traits<unsigned long long> : integer_value_traits<unsigned long long> {};
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#ifdef TOML_INT128
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template <>
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struct integer_value_limits<TOML_INT128>
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{
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static constexpr TOML_INT128 max = static_cast<TOML_INT128>(
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(TOML_UINT128{ 1u } << ((__SIZEOF_INT128__ * CHAR_BIT) - 1)) - 1
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);
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static constexpr TOML_INT128 min = -max - TOML_INT128{ 1 };
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};
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template <>
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struct integer_value_limits<TOML_UINT128>
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{
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static constexpr TOML_UINT128 min = TOML_UINT128{};
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static constexpr TOML_UINT128 max = (2u * static_cast<TOML_UINT128>(integer_value_limits<TOML_INT128>::max)) + 1u;
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};
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template <> struct value_traits<TOML_INT128> : integer_value_traits<TOML_INT128> {};
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template <> struct value_traits<TOML_UINT128> : integer_value_traits<TOML_UINT128> {};
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#endif
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#ifdef TOML_SMALL_INT_TYPE
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template <> struct value_traits<TOML_SMALL_INT_TYPE> : signed_integer_value_traits<TOML_SMALL_INT_TYPE> {};
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#endif
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static_assert(value_traits<int64_t>::is_native);
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static_assert(value_traits<int64_t>::is_signed);
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static_assert(value_traits<int64_t>::is_losslessly_convertible_to_native);
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static_assert(value_traits<int64_t>::can_represent_native);
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static_assert(value_traits<int64_t>::can_partially_represent_native);
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// float value traits
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template <typename T>
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struct float_value_limits
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{
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static constexpr bool is_iec559 = std::numeric_limits<T>::is_iec559;
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static constexpr int digits = std::numeric_limits<T>::digits;
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static constexpr int digits10 = std::numeric_limits<T>::digits10;
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};
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template <typename T>
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struct float_value_traits : float_value_limits<T>
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{
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using native_type = double;
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static constexpr bool is_native = std::is_same_v<T, native_type>;
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static constexpr bool is_signed = true;
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static constexpr bool is_losslessly_convertible_to_native
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= float_value_limits<T>::is_iec559
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&& float_value_limits<T>::digits <= 53
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&& float_value_limits<T>::digits10 <= 15;
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static constexpr bool can_represent_native
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= float_value_limits<T>::is_iec559
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&& float_value_limits<T>::digits >= 53 // DBL_MANT_DIG
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&& float_value_limits<T>::digits10 >= 15; // DBL_DIG
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static constexpr bool can_partially_represent_native //32-bit float values
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= float_value_limits<T>::is_iec559
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&& float_value_limits<T>::digits >= 24
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&& float_value_limits<T>::digits10 >= 6;
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static constexpr auto type = node_type::floating_point;
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};
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template <> struct value_traits<float> : float_value_traits<float> {};
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template <> struct value_traits<double> : float_value_traits<double> {};
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template <> struct value_traits<long double> : float_value_traits<long double> {};
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template <int mant_dig, int dig>
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struct extended_float_value_limits
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{
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static constexpr bool is_iec559 = true;
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static constexpr int digits = mant_dig;
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static constexpr int digits10 = dig;
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};
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#ifdef TOML_FP16
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template <> struct float_value_limits<TOML_FP16> : extended_float_value_limits<__FLT16_MANT_DIG__, __FLT16_DIG__> {};
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template <> struct value_traits<TOML_FP16> : float_value_traits<TOML_FP16> {};
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#endif
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#ifdef TOML_FLOAT16
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template <> struct float_value_limits<TOML_FLOAT16> : extended_float_value_limits<__FLT16_MANT_DIG__, __FLT16_DIG__> {};
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template <> struct value_traits<TOML_FLOAT16> : float_value_traits<TOML_FLOAT16> {};
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#endif
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#ifdef TOML_FLOAT128
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template <> struct float_value_limits<TOML_FLOAT128> : extended_float_value_limits<__FLT128_MANT_DIG__, __FLT128_DIG__> {};
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template <> struct value_traits<TOML_FLOAT128> : float_value_traits<TOML_FLOAT128> {};
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#endif
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#ifdef TOML_SMALL_FLOAT_TYPE
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template <> struct value_traits<TOML_SMALL_FLOAT_TYPE> : float_value_traits<TOML_SMALL_FLOAT_TYPE> {};
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#endif
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static_assert(value_traits<double>::is_native);
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static_assert(value_traits<double>::is_losslessly_convertible_to_native);
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static_assert(value_traits<double>::can_represent_native);
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static_assert(value_traits<double>::can_partially_represent_native);
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// string value traits
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template <typename T>
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struct string_value_traits
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{
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using native_type = std::string;
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|
static constexpr bool is_native = std::is_same_v<T, native_type>;
|
|
static constexpr bool is_losslessly_convertible_to_native = true;
|
|
static constexpr bool can_represent_native
|
|
= !std::is_array_v<T>
|
|
&& (!std::is_pointer_v<T> || std::is_const_v<std::remove_pointer_t<T>>);
|
|
static constexpr bool can_partially_represent_native = can_represent_native;
|
|
static constexpr auto type = node_type::string;
|
|
};
|
|
template <> struct value_traits<std::string> : string_value_traits<std::string> {};
|
|
template <> struct value_traits<std::string_view> : string_value_traits<std::string_view> {};
|
|
template <> struct value_traits<const char*> : string_value_traits<const char *> {};
|
|
template <size_t N> struct value_traits<const char[N]> : string_value_traits<const char[N]> {};
|
|
template <> struct value_traits<char*> : string_value_traits<char*> {};
|
|
template <size_t N> struct value_traits<char[N]> : string_value_traits<char[N]> {};
|
|
#ifdef __cpp_lib_char8_t
|
|
template <> struct value_traits<std::u8string> : string_value_traits<std::u8string> {};
|
|
template <> struct value_traits<std::u8string_view> : string_value_traits<std::u8string_view> {};
|
|
template <> struct value_traits<const char8_t*> : string_value_traits<const char8_t*> {};
|
|
template <size_t N> struct value_traits<const char8_t[N]> : string_value_traits<const char8_t[N]> {};
|
|
template <> struct value_traits<char8_t*> : string_value_traits<char8_t*> {};
|
|
template <size_t N> struct value_traits<char8_t[N]> : string_value_traits<char8_t[N]> {};
|
|
#endif
|
|
#if TOML_WINDOWS_COMPAT
|
|
template <typename T>
|
|
struct wstring_value_traits
|
|
{
|
|
using native_type = std::string;
|
|
static constexpr bool is_native = false;
|
|
static constexpr bool is_losslessly_convertible_to_native = true; //narrow
|
|
static constexpr bool can_represent_native = std::is_same_v<T, std::wstring>; //widen
|
|
static constexpr bool can_partially_represent_native = can_represent_native;
|
|
static constexpr auto type = node_type::string;
|
|
};
|
|
template <> struct value_traits<std::wstring> : wstring_value_traits<std::wstring> {};
|
|
template <> struct value_traits<std::wstring_view> : wstring_value_traits<std::wstring_view> {};
|
|
template <> struct value_traits<const wchar_t*> : wstring_value_traits<const wchar_t*> {};
|
|
template <size_t N> struct value_traits<const wchar_t[N]> : wstring_value_traits<const wchar_t[N]> {};
|
|
template <> struct value_traits<wchar_t*> : wstring_value_traits<wchar_t*> {};
|
|
template <size_t N> struct value_traits<wchar_t[N]> : wstring_value_traits<wchar_t[N]> {};
|
|
#endif
|
|
|
|
// other native value traits
|
|
template <typename T, node_type NodeType>
|
|
struct native_value_traits
|
|
{
|
|
using native_type = T;
|
|
static constexpr bool is_native = true;
|
|
static constexpr bool is_losslessly_convertible_to_native = true;
|
|
static constexpr bool can_represent_native = true;
|
|
static constexpr bool can_partially_represent_native = true;
|
|
static constexpr auto type = NodeType;
|
|
};
|
|
template <> struct value_traits<bool> : native_value_traits<bool, node_type::boolean> {};
|
|
template <> struct value_traits<date> : native_value_traits<date, node_type::date> {};
|
|
template <> struct value_traits<time> : native_value_traits<time, node_type::time> {};
|
|
template <> struct value_traits<date_time> : native_value_traits<date_time, node_type::date_time> {};
|
|
|
|
// native value category queries
|
|
template <typename T>
|
|
using native_type_of = typename value_traits<T>::native_type;
|
|
template <typename T>
|
|
inline constexpr bool is_native = value_traits<T>::is_native;
|
|
template <typename T>
|
|
inline constexpr bool can_represent_native = value_traits<T>::can_represent_native;
|
|
template <typename T>
|
|
inline constexpr bool can_partially_represent_native = value_traits<T>::can_partially_represent_native;
|
|
template <typename T>
|
|
inline constexpr bool is_losslessly_convertible_to_native = value_traits<T>::is_losslessly_convertible_to_native;
|
|
template <typename T, typename... U>
|
|
inline constexpr bool is_natively_one_of = is_one_of<native_type_of<T>, U...>;
|
|
|
|
// native <=> node conversions
|
|
template <typename T> struct node_wrapper { using type = T; };
|
|
template <> struct node_wrapper<std::string> { using type = value<std::string>; };
|
|
template <> struct node_wrapper<int64_t> { using type = value<int64_t>; };
|
|
template <> struct node_wrapper<double> { using type = value<double>; };
|
|
template <> struct node_wrapper<bool> { using type = value<bool>; };
|
|
template <> struct node_wrapper<date> { using type = value<date>; };
|
|
template <> struct node_wrapper<time> { using type = value<time>; };
|
|
template <> struct node_wrapper<date_time> { using type = value<date_time>; };
|
|
template <typename T> using wrap_node = typename node_wrapper<T>::type;
|
|
|
|
template <typename T> struct node_unwrapper { using type = T; };
|
|
template <typename T> struct node_unwrapper<value<T>> { using type = T; };
|
|
template <typename T> using unwrap_node = typename node_unwrapper<T>::type;
|
|
|
|
template <typename T> struct node_type_getter { static constexpr auto value = value_traits<T>::type; };
|
|
template <> struct node_type_getter<table> { static constexpr auto value = node_type::table; };
|
|
template <> struct node_type_getter<array> { static constexpr auto value = node_type::array; };
|
|
template <> struct node_type_getter<void> { static constexpr auto value = node_type::none; };
|
|
template <typename T>
|
|
inline constexpr node_type node_type_of = node_type_getter<unwrap_node<remove_cvref_t<T>>>::value;
|
|
|
|
template <typename T>
|
|
inline constexpr bool is_node_view = is_one_of<impl::remove_cvref_t<T>, node_view<node>, node_view<const node>>;
|
|
}
|
|
TOML_IMPL_NAMESPACE_END
|
|
|
|
TOML_NAMESPACE_START
|
|
{
|
|
/// \brief Metafunction for determining if a type is a toml::table.
|
|
template <typename T>
|
|
inline constexpr bool is_table = std::is_same_v<impl::remove_cvref_t<T>, table>;
|
|
|
|
/// \brief Metafunction for determining if a type is a toml::array.
|
|
template <typename T>
|
|
inline constexpr bool is_array = std::is_same_v<impl::remove_cvref_t<T>, array>;
|
|
|
|
/// \brief Metafunction for determining if a type is a std::string or toml::value<std::string>.
|
|
template <typename T>
|
|
inline constexpr bool is_string = std::is_same_v<impl::wrap_node<impl::remove_cvref_t<T>>, value<std::string>>;
|
|
|
|
/// \brief Metafunction for determining if a type is an int64_t or toml::value<int64_t>.
|
|
template <typename T>
|
|
inline constexpr bool is_integer = std::is_same_v<impl::wrap_node<impl::remove_cvref_t<T>>, value<int64_t>>;
|
|
|
|
/// \brief Metafunction for determining if a type is a double or toml::value<double>.
|
|
template <typename T>
|
|
inline constexpr bool is_floating_point = std::is_same_v<impl::wrap_node<impl::remove_cvref_t<T>>, value<double>>;
|
|
|
|
/// \brief Metafunction for determining if a type satisfies `toml::is_integer || toml::is_floating_point`.
|
|
template <typename T>
|
|
inline constexpr bool is_number = is_integer<T> || is_floating_point<T>;
|
|
|
|
/// \brief Metafunction for determining if a type is a bool toml::value<bool>.
|
|
template <typename T>
|
|
inline constexpr bool is_boolean = std::is_same_v<impl::wrap_node<impl::remove_cvref_t<T>>, value<bool>>;
|
|
|
|
/// \brief Metafunction for determining if a type is a toml::date or toml::value<date>.
|
|
template <typename T>
|
|
inline constexpr bool is_date = std::is_same_v<impl::wrap_node<impl::remove_cvref_t<T>>, value<date>>;
|
|
|
|
/// \brief Metafunction for determining if a type is a toml::time or toml::value<time>.
|
|
template <typename T>
|
|
inline constexpr bool is_time = std::is_same_v<impl::wrap_node<impl::remove_cvref_t<T>>, value<time>>;
|
|
|
|
/// \brief Metafunction for determining if a type is a toml::date_time or toml::value<date_time>.
|
|
template <typename T>
|
|
inline constexpr bool is_date_time = std::is_same_v<impl::wrap_node<impl::remove_cvref_t<T>>, value<date_time>>;
|
|
}
|
|
TOML_NAMESPACE_END
|
|
|
|
//#====================================================================================================================
|
|
//# INTERNAL HELPERS
|
|
//#====================================================================================================================
|
|
|
|
TOML_IMPL_NAMESPACE_START
|
|
{
|
|
template <typename T>
|
|
[[nodiscard]]
|
|
TOML_ATTR(const)
|
|
TOML_ALWAYS_INLINE
|
|
constexpr std::underlying_type_t<T> unwrap_enum(T val) noexcept
|
|
{
|
|
return static_cast<std::underlying_type_t<T>>(val);
|
|
}
|
|
|
|
// Q: "why not use the built-in fpclassify?"
|
|
// A: Because it gets broken by -ffast-math and friends
|
|
enum class fp_class : unsigned { ok, neg_inf, pos_inf, nan };
|
|
[[nodiscard]]
|
|
TOML_ATTR(pure)
|
|
inline fp_class fpclassify(const double& val) noexcept
|
|
{
|
|
constexpr uint64_t sign = 0b1000000000000000000000000000000000000000000000000000000000000000ull;
|
|
constexpr uint64_t exponent = 0b0111111111110000000000000000000000000000000000000000000000000000ull;
|
|
constexpr uint64_t mantissa = 0b0000000000001111111111111111111111111111111111111111111111111111ull;
|
|
|
|
uint64_t val_bits;
|
|
memcpy(&val_bits, &val, sizeof(val));
|
|
if ((val_bits & exponent) != exponent)
|
|
return fp_class::ok;
|
|
if ((val_bits & mantissa))
|
|
return fp_class::nan;
|
|
return (val_bits & sign) ? fp_class::neg_inf : fp_class::pos_inf;
|
|
}
|
|
|
|
// Q: "why not use std::find??"
|
|
// A: Because <algorithm> is _huge_ and std::find would be the only thing I used from it.
|
|
// I don't want to impose such a heavy compile-time burden on users.
|
|
template <typename T>
|
|
[[nodiscard]]
|
|
inline const T* find(const std::vector<T>& haystack, const T& needle) noexcept
|
|
{
|
|
for (size_t i = 0, e = haystack.size(); i < e; i++)
|
|
if (haystack[i] == needle)
|
|
return haystack.data() + i;
|
|
return nullptr;
|
|
}
|
|
|
|
inline constexpr std::string_view low_character_escape_table[] =
|
|
{
|
|
"\\u0000"sv,
|
|
"\\u0001"sv,
|
|
"\\u0002"sv,
|
|
"\\u0003"sv,
|
|
"\\u0004"sv,
|
|
"\\u0005"sv,
|
|
"\\u0006"sv,
|
|
"\\u0007"sv,
|
|
"\\b"sv,
|
|
"\\t"sv,
|
|
"\\n"sv,
|
|
"\\u000B"sv,
|
|
"\\f"sv,
|
|
"\\r"sv,
|
|
"\\u000E"sv,
|
|
"\\u000F"sv,
|
|
"\\u0010"sv,
|
|
"\\u0011"sv,
|
|
"\\u0012"sv,
|
|
"\\u0013"sv,
|
|
"\\u0014"sv,
|
|
"\\u0015"sv,
|
|
"\\u0016"sv,
|
|
"\\u0017"sv,
|
|
"\\u0018"sv,
|
|
"\\u0019"sv,
|
|
"\\u001A"sv,
|
|
"\\u001B"sv,
|
|
"\\u001C"sv,
|
|
"\\u001D"sv,
|
|
"\\u001E"sv,
|
|
"\\u001F"sv,
|
|
};
|
|
|
|
inline constexpr std::string_view node_type_friendly_names[] =
|
|
{
|
|
"none"sv,
|
|
"table"sv,
|
|
"array"sv,
|
|
"string"sv,
|
|
"integer"sv,
|
|
"floating-point"sv,
|
|
"boolean"sv,
|
|
"date"sv,
|
|
"time"sv,
|
|
"date-time"sv
|
|
};
|
|
}
|
|
TOML_IMPL_NAMESPACE_END
|
|
|
|
TOML_NAMESPACE_START
|
|
{
|
|
[[nodiscard]]
|
|
TOML_ATTR(const)
|
|
TOML_ALWAYS_INLINE
|
|
TOML_CONSTEVAL size_t operator"" _sz(unsigned long long n) noexcept
|
|
{
|
|
return static_cast<size_t>(n);
|
|
}
|
|
}
|
|
TOML_NAMESPACE_END
|
|
|
|
//#====================================================================================================================
|
|
//# SOURCE POSITIONS & REGIONS
|
|
//#====================================================================================================================
|
|
|
|
TOML_NAMESPACE_START
|
|
{
|
|
TOML_ABI_NAMESPACE_BOOL(TOML_LARGE_FILES, lf, sf)
|
|
|
|
#if TOML_LARGE_FILES
|
|
using source_index = uint32_t;
|
|
#else
|
|
/// \brief The integer type used to tally line numbers and columns.
|
|
/// \remarks This will be an alias for uint32_t if #TOML_LARGE_FILES is enabled.
|
|
using source_index = uint16_t;
|
|
#endif
|
|
|
|
/// \brief A source document line-and-column pair.
|
|
///
|
|
/// \detail \cpp
|
|
/// auto table = toml::parse_file("config.toml"sv);
|
|
/// std::cout << "The node 'description' was defined at "sv
|
|
/// << table.get("description")->source().begin()
|
|
/// << "\n";
|
|
///
|
|
/// \ecpp
|
|
///
|
|
/// \out
|
|
/// The value 'description' was defined at line 7, column 15
|
|
/// \eout
|
|
///
|
|
/// \remarks toml++'s parser is unicode-aware insofar as it knows how to handle
|
|
/// various non-conventional whitespace and newline characters, but it doesn't give
|
|
/// much thought to combining marks, grapheme clusters vs. characters, et cetera.
|
|
/// If a TOML document contains lots of codepoints outside of the ASCII range
|
|
/// you may find that your source_positions don't match those given by a text editor
|
|
/// (typically the line numbers will be accurate but column numbers will be too high).
|
|
/// <strong>This is not an error.</strong> I've chosen this behaviour as a deliberate trade-off
|
|
/// between parser complexity and correctness.
|
|
struct TOML_TRIVIAL_ABI source_position
|
|
{
|
|
/// \brief The line number.
|
|
/// \remarks Valid line numbers start at 1.
|
|
source_index line;
|
|
|
|
/// \brief The column number.
|
|
/// \remarks Valid column numbers start at 1.
|
|
source_index column;
|
|
|
|
/// \brief Returns true if both line and column numbers are non-zero.
|
|
[[nodiscard]]
|
|
explicit constexpr operator bool () const noexcept
|
|
{
|
|
return line > source_index{} && column > source_index{};
|
|
}
|
|
|
|
/// \brief Returns true if two source_positions represent the same line and column.
|
|
[[nodiscard]]
|
|
friend constexpr bool operator == (const source_position& lhs, const source_position& rhs) noexcept
|
|
{
|
|
return lhs.line == rhs.line
|
|
&& lhs.column == rhs.column;
|
|
}
|
|
|
|
/// \brief Returns true if two source_positions do not represent the same line and column.
|
|
[[nodiscard]]
|
|
friend constexpr bool operator != (const source_position& lhs, const source_position& rhs) noexcept
|
|
{
|
|
return lhs.line != rhs.line
|
|
|| lhs.column != rhs.column;
|
|
}
|
|
|
|
/// \brief Returns true if the LHS position is before the RHS position.
|
|
[[nodiscard]]
|
|
friend constexpr bool operator < (const source_position& lhs, const source_position& rhs) noexcept
|
|
{
|
|
return lhs.line < rhs.line
|
|
|| (lhs.line == rhs.line && lhs.column < rhs.column);
|
|
}
|
|
|
|
/// \brief Returns true if the LHS position is before the RHS position or equal to it.
|
|
[[nodiscard]]
|
|
friend constexpr bool operator <= (const source_position& lhs, const source_position& rhs) noexcept
|
|
{
|
|
return lhs.line < rhs.line
|
|
|| (lhs.line == rhs.line && lhs.column <= rhs.column);
|
|
}
|
|
};
|
|
|
|
/// \brief A source document region.
|
|
///
|
|
/// \detail \cpp
|
|
/// #include <fstream>
|
|
///
|
|
/// auto tbl = toml::parse_file("config.toml"sv);
|
|
/// if (auto server = tbl.get("server"))
|
|
/// {
|
|
/// std::cout << "begin: "sv << server->source().begin << "\n";
|
|
/// std::cout << "end: "sv << server->source().end << "\n";
|
|
/// std::cout << "path: "sv << *server->source().path << "\n";
|
|
/// }
|
|
///
|
|
/// \ecpp
|
|
///
|
|
/// \out
|
|
/// begin: line 3, column 1
|
|
/// end: line 3, column 22
|
|
/// path: config.toml
|
|
/// \eout
|
|
///
|
|
/// \remarks toml++'s parser is unicode-aware insofar as it knows how to handle
|
|
/// various non-conventional whitespace and newline characters, but it doesn't give
|
|
/// much thought to combining marks, grapheme clusters vs. characters, et cetera.
|
|
/// If a TOML document contains lots of codepoints outside of the ASCII range
|
|
/// you may find that your source_positions don't match those given by a text editor
|
|
/// (typically the line numbers will be accurate but column numbers will be too high).
|
|
/// <strong>This is not an error.</strong> I've chosen this behaviour as a deliberate trade-off
|
|
/// between parser complexity and correctness.
|
|
struct source_region
|
|
{
|
|
/// \brief The beginning of the region (inclusive).
|
|
source_position begin;
|
|
|
|
/// \brief The end of the region (exclusive).
|
|
source_position end;
|
|
|
|
/// \brief The path to the corresponding source document.
|
|
///
|
|
/// \remarks This will be `nullptr` if no path was provided to toml::parse().
|
|
source_path_ptr path;
|
|
|
|
#if TOML_WINDOWS_COMPAT
|
|
|
|
/// \brief The path to the corresponding source document as a wide-string.
|
|
///
|
|
/// \remarks This will return an empty optional if no path was provided to toml::parse().
|
|
///
|
|
/// \attention This function is only available when #TOML_WINDOWS_COMPAT is enabled.
|
|
[[nodiscard]]
|
|
optional<std::wstring> wide_path() const noexcept
|
|
{
|
|
if (!path || path->empty())
|
|
return {};
|
|
return { impl::widen(*path) };
|
|
}
|
|
|
|
#endif
|
|
};
|
|
|
|
TOML_ABI_NAMESPACE_END // TOML_LARGE_FILES
|
|
}
|
|
TOML_NAMESPACE_END
|
|
|
|
//#====================================================================================================================
|
|
//# OTHER
|
|
//#====================================================================================================================
|
|
|
|
TOML_NAMESPACE_START
|
|
{
|
|
/// \brief Metadata associated with TOML values.
|
|
enum class value_flags : uint8_t
|
|
{
|
|
/// \brief None.
|
|
none,
|
|
|
|
/// \brief Format integer values as binary.
|
|
format_as_binary = 1,
|
|
|
|
/// \brief Format integer values as octal.
|
|
format_as_octal = 2,
|
|
|
|
/// \brief Format integer values as hexadecimal.
|
|
format_as_hexadecimal = 3,
|
|
};
|
|
TOML_MAKE_BITOPS(value_flags)
|
|
|
|
/// \brief Format flags for modifying how TOML data is printed to streams.
|
|
enum class format_flags : uint8_t
|
|
{
|
|
/// \brief None.
|
|
none,
|
|
|
|
/// \brief Dates and times will be emitted as quoted strings.
|
|
quote_dates_and_times = 1,
|
|
|
|
/// \brief Strings will be emitted as single-quoted literal strings where possible.
|
|
allow_literal_strings = 2,
|
|
|
|
/// \brief Strings containing newlines will be emitted as triple-quoted 'multi-line' strings where possible.
|
|
allow_multi_line_strings = 4,
|
|
|
|
/// \brief Values with special format flags will be formatted accordingly.
|
|
allow_value_format_flags = 8,
|
|
};
|
|
TOML_MAKE_BITOPS(format_flags)
|
|
|
|
/// \brief Pretty-prints the value of a node_type to a stream.
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///
|
|
/// \detail \cpp
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/// auto arr = toml::array{ 1, 2.0, "3", false };
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/// for (size_t i = 0; i < arr.size() i++)
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|
/// std::cout << "Element ["sv << i << "] is: "sv << arr[i].type() << "\n";
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///
|
|
/// \ecpp
|
|
///
|
|
/// \out
|
|
/// Element [0] is: integer
|
|
/// Element [1] is: floating-point
|
|
/// Element [2] is: string
|
|
/// Element [3] is: boolean
|
|
/// \eout
|
|
template <typename Char>
|
|
inline std::basic_ostream<Char>& operator << (std::basic_ostream<Char>& lhs, node_type rhs)
|
|
{
|
|
using underlying_t = std::underlying_type_t<node_type>;
|
|
const auto str = impl::node_type_friendly_names[static_cast<underlying_t>(rhs)];
|
|
if constexpr (std::is_same_v<Char, char>)
|
|
return lhs << str;
|
|
else
|
|
{
|
|
if constexpr (sizeof(Char) == 1)
|
|
return lhs << std::basic_string_view<Char>{ reinterpret_cast<const Char*>(str.data()), str.length() };
|
|
else
|
|
return lhs << str.data();
|
|
}
|
|
}
|
|
|
|
#ifndef DOXYGEN
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|
|
|
namespace impl
|
|
{
|
|
#define TOML_P2S_DECL(Type) \
|
|
template <typename Char> \
|
|
inline void print_to_stream(Type, std::basic_ostream<Char>&, value_flags = {})
|
|
TOML_P2S_DECL(int8_t);
|
|
TOML_P2S_DECL(int16_t);
|
|
TOML_P2S_DECL(int32_t);
|
|
TOML_P2S_DECL(int64_t);
|
|
TOML_P2S_DECL(uint8_t);
|
|
TOML_P2S_DECL(uint16_t);
|
|
TOML_P2S_DECL(uint32_t);
|
|
TOML_P2S_DECL(uint64_t);
|
|
#undef TOML_P2S_DECL
|
|
|
|
#define TOML_P2S_DECL(Type) \
|
|
template <typename Char> \
|
|
inline void print_to_stream(Type, std::basic_ostream<Char>&)
|
|
TOML_P2S_DECL(double);
|
|
TOML_P2S_DECL(const date&);
|
|
TOML_P2S_DECL(const time&);
|
|
TOML_P2S_DECL(time_offset);
|
|
TOML_P2S_DECL(const date_time&);
|
|
#undef TOML_P2S_DECL
|
|
}
|
|
|
|
#if !TOML_HEADER_ONLY
|
|
extern template TOML_API std::ostream& operator << (std::ostream&, node_type);
|
|
#endif // !TOML_HEADER_ONLY
|
|
|
|
#endif // !DOXYGEN
|
|
}
|
|
TOML_NAMESPACE_END
|
|
|