595 lines
20 KiB
C++
595 lines
20 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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////////// INCLUDES
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TOML_PUSH_WARNINGS
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TOML_DISABLE_ALL_WARNINGS
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#if __has_include(<version>)
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#include <version>
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#endif
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#include <cstdint>
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#include <cstring> //memcpy, memset
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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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#ifndef TOML_OPTIONAL_TYPE
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#include <optional>
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#endif
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TOML_POP_WARNINGS
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#if TOML_CHAR_8_STRINGS && !defined(__cpp_lib_char8_t)
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#error toml++ requires implementation support to use char8_t strings, but yours does not provide it.
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#endif
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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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////////// FORWARD DECLARATIONS & TYPEDEFS
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/// \brief The root namespace for all toml++ functions and types.
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namespace toml
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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 size_t = std::size_t;
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using ptrdiff_t = std::ptrdiff_t;
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[[nodiscard]]
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TOML_ATTR(const)
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TOML_ALWAYS_INLINE
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TOML_CONSTEVAL size_t operator"" _sz(unsigned long long n) noexcept
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{
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return static_cast<size_t>(n);
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}
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#if TOML_CHAR_8_STRINGS
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using string_char = char8_t;
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using string = std::u8string;
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using string_view = std::u8string_view;
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#else
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/// \brief The base character type for keys and string values.
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/// \remarks This will be an alias for char8_t if #TOML_CHAR_8_STRINGS is enabled.
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using string_char = char;
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/// \brief The string type for keys and string values.
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/// \remarks This will be an alias for std::u8string if #TOML_CHAR_8_STRINGS is enabled.
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using string = std::string;
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/// \brief The string type for keys and string values.
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/// \remarks This will be an alias for std::u8string_view if #TOML_CHAR_8_STRINGS is enabled.
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using string_view = std::string_view;
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#endif
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TOML_PUSH_WARNINGS
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TOML_DISABLE_PADDING_WARNINGS
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TOML_DISABLE_SHADOW_WARNINGS // false positive on gcc
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#if !TOML_DOXYGEN
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// foward declarations are hidden from doxygen
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// because they fuck it up =/
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struct date;
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struct time;
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struct time_offset;
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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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#ifdef TOML_OPTIONAL_TYPE
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TOML_ABI_NAMESPACE_START(custopt)
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#else
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TOML_ABI_NAMESPACE_START(stdopt)
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#endif
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struct date_time;
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TOML_ABI_NAMESPACE_END // TOML_OPTIONAL_TYPE
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#endif // !TOML_DOXYGEN
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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<toml::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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TOML_POP_WARNINGS // TOML_DISABLE_PADDING_WARNINGS, TOML_DISABLE_SHADOW_WARNINGS
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#ifdef TOML_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 a simple 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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#if TOML_LARGE_FILES
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using source_index = uint32_t;
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#else
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/// \brief The integer type used to tally line numbers and columns.
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/// \remarks This will be an alias for uint32_t if #TOML_LARGE_FILES is enabled.
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using source_index = uint16_t;
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#endif
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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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#if TOML_LARGE_FILES
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TOML_ABI_NAMESPACE_START(lf)
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#else
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TOML_ABI_NAMESPACE_START(sf)
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#endif
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/// \brief A source document line-and-column pair.
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///
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/// \detail \cpp
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/// auto table = toml::parse_file("config.toml"sv);
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/// std::cout << "The node 'description' was defined at "sv
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/// << table.get("description")->source().begin()
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/// << std::endl;
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///
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/// \ecpp
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///
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/// \out
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/// The value 'description' was defined at line 7, column 15
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/// \eout
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///
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/// \remarks toml++'s parser is unicode-aware insofar as it knows how to handle
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/// various non-conventional whitespace and newline characters, but it doesn't give
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/// much thought to combining marks, grapheme clusters vs. characters, et cetera.
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/// If a TOML document contains lots of codepoints outside of the ASCII range
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/// you may find that your source_positions don't match those given by a text editor
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/// (typically the line numbers will be accurate but column numbers will be too high).
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/// <strong>This is not an error.</strong> I've chosen this behaviour as a deliberate trade-off
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/// between parser complexity and correctness.
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struct TOML_TRIVIAL_ABI source_position
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{
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/// \brief The line number.
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/// \remarks Valid line numbers start at 1.
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source_index line;
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/// \brief The column number.
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/// \remarks Valid column numbers start at 1.
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source_index column;
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/// \brief Returns true if both line and column numbers are non-zero.
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[[nodiscard]]
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explicit constexpr operator bool () const noexcept
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{
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return line > source_index{} && column > source_index{};
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}
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/// \brief Returns true if two source_positions represent the same line and column.
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[[nodiscard]]
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friend constexpr bool operator == (const source_position& lhs, const source_position& rhs) noexcept
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{
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return lhs.line == rhs.line
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&& lhs.column == rhs.column;
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}
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/// \brief Returns true if two source_positions do not represent the same line and column.
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[[nodiscard]]
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friend constexpr bool operator != (const source_position& lhs, const source_position& rhs) noexcept
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{
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return lhs.line != rhs.line
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|| lhs.column != rhs.column;
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}
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/// \brief Returns true if the LHS position is before the RHS position.
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[[nodiscard]]
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friend constexpr bool operator < (const source_position& lhs, const source_position& rhs) noexcept
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{
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return lhs.line < rhs.line
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|| (lhs.line == rhs.line && lhs.column < rhs.column);
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}
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/// \brief Returns true if the LHS position is before the RHS position or equal to it.
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[[nodiscard]]
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friend constexpr bool operator <= (const source_position& lhs, const source_position& rhs) noexcept
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{
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return lhs.line < rhs.line
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|| (lhs.line == rhs.line && lhs.column <= rhs.column);
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}
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};
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/// \brief A source document region.
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///
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/// \detail \cpp
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/// #include <fstream>
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///
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/// auto tbl = toml::parse_file("config.toml"sv);
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/// if (auto server = tbl.get("server"))
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/// {
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/// std::cout << "begin: "sv << server->source().begin << std::endl;
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/// std::cout << "end: "sv << server->source().end << std::endl;
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/// std::cout << "path: "sv << *server->source().path << std::endl;
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/// }
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///
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/// \ecpp
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///
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/// \out
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/// begin: line 3, column 1
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/// end: line 3, column 22
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/// path: config.toml
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/// \eout
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///
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/// \remarks toml++'s parser is unicode-aware insofar as it knows how to handle
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/// various non-conventional whitespace and newline characters, but it doesn't give
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/// much thought to combining marks, grapheme clusters vs. characters, et cetera.
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/// If a TOML document contains lots of codepoints outside of the ASCII range
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/// you may find that your source_positions don't match those given by a text editor
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/// (typically the line numbers will be accurate but column numbers will be too high).
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/// <strong>This is not an error.</strong> I've chosen this behaviour as a deliberate trade-off
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/// between parser complexity and correctness.
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struct source_region
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{
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/// \brief The beginning of the region (inclusive).
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source_position begin;
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/// \brief The end of the region (exclusive).
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source_position end;
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/// \brief The path to the corresponding source document.
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///
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/// \remarks This will be `nullptr` if no path was provided to toml::parse().
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source_path_ptr path;
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};
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TOML_ABI_NAMESPACE_END // TOML_LARGE_FILES
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}
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namespace toml::impl
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{
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template <typename T>
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using string_map = std::map<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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struct is_one_of_ : std::integral_constant<bool,
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(false || ... || std::is_same_v<T, U>)
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> {};
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template <typename T, typename... U>
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inline constexpr bool is_one_of = is_one_of_<T, U...>::value;
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template <typename T>
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[[nodiscard]]
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TOML_ATTR(const)
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TOML_ALWAYS_INLINE
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constexpr std::underlying_type_t<T> unbox_enum(T val) noexcept
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{
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return static_cast<std::underlying_type_t<T>>(val);
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}
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// Q: "why not use std::find??"
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// A: Because <algorithm> is _huge_ and std::find would be the only thing I used from it.
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// I don't want to impose such a heavy compile-time burden on users.
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template <typename T>
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[[nodiscard]]
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inline const T* find(const std::vector<T>& haystack, const T& needle) noexcept
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{
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for (size_t i = 0, e = haystack.size(); i < e; i++)
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if (haystack[i] == needle)
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return haystack.data() + i;
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return nullptr;
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}
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#if TOML_ABI_NAMESPACES
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#if TOML_EXCEPTIONS
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TOML_ABI_NAMESPACE_START(impl_ex)
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#define TOML_PARSER_TYPENAME ::toml::impl::abi_impl_ex::parser
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#else
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TOML_ABI_NAMESPACE_START(impl_noex)
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#define TOML_PARSER_TYPENAME ::toml::impl::abi_impl_noex::parser
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#endif
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#else
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#define TOML_PARSER_TYPENAME ::toml::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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template <typename T>
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inline constexpr bool is_value =
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std::is_same_v<T, string>
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|| std::is_same_v<T, int64_t>
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|| std::is_same_v<T, double>
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|| std::is_same_v<T, bool>
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|| std::is_same_v<T, date>
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|| std::is_same_v<T, time>
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|| std::is_same_v<T, date_time>;
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template <typename T>
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inline constexpr bool is_value_or_promotable =
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is_value<T>
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|| std::is_same_v<std::decay_t<T>, string_char*>
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|| std::is_same_v<T, string_view>
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|| std::is_same_v<T, int32_t>
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|| std::is_same_v<T, int16_t>
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|| std::is_same_v<T, int8_t>
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|| std::is_same_v<T, uint32_t>
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|| std::is_same_v<T, uint16_t>
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|| std::is_same_v<T, uint8_t>
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|| std::is_same_v<T, float>
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#ifdef TOML_SMALL_FLOAT_TYPE
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|| std::is_same_v<T, TOML_SMALL_FLOAT_TYPE>
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#endif
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#ifdef TOML_SMALL_INT_TYPE
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|| std::is_same_v<T, TOML_SMALL_INT_TYPE>
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#endif
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;
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template <typename T>
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inline constexpr bool is_value_or_node =
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is_value<T>
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|| std::is_same_v<T, array>
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|| std::is_same_v<T, table>;
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template <typename T> struct node_wrapper { using type = T; };
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template <> struct node_wrapper<string> { using type = value<string>; };
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template <> struct node_wrapper<int64_t> { using type = value<int64_t>; };
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template <> struct node_wrapper<double> { using type = value<double>; };
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template <> struct node_wrapper<bool> { using type = value<bool>; };
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template <> struct node_wrapper<date> { using type = value<date>; };
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template <> struct node_wrapper<time> { using type = value<time>; };
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template <> struct node_wrapper<date_time> { using type = value<date_time>; };
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template <typename T>
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using node_of = typename impl::node_wrapper<T>::type;
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template <typename T> struct node_unwrapper { using type = T; };
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template <typename T> struct node_unwrapper<value<T>> { using type = T; };
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template <typename T> using unwrapped = typename impl::node_unwrapper<T>::type;
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template <typename T> struct value_promoter { using type = T; };
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template <size_t N> struct value_promoter<const string_char[N]> { using type = string; };
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template <size_t N> struct value_promoter<const string_char(&)[N]> { using type = string; };
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template <size_t N> struct value_promoter<const string_char(&&)[N]> { using type = string; };
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template <> struct value_promoter<const string_char*> { using type = string; };
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template <size_t N> struct value_promoter<string_char[N]> { using type = string; };
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template <size_t N> struct value_promoter<string_char(&)[N]> { using type = string; };
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template <size_t N> struct value_promoter<string_char(&&)[N]> { using type = string; };
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template <> struct value_promoter<string_char*> { using type = string; };
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template <> struct value_promoter<string_view> { using type = string; };
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template <> struct value_promoter<int32_t> { using type = int64_t; };
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template <> struct value_promoter<int16_t> { using type = int64_t; };
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template <> struct value_promoter<int8_t> { using type = int64_t; };
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template <> struct value_promoter<uint32_t> { using type = int64_t; };
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template <> struct value_promoter<uint16_t> { using type = int64_t; };
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template <> struct value_promoter<uint8_t> { using type = int64_t; };
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template <> struct value_promoter<float> { using type = double; };
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#ifdef TOML_SMALL_FLOAT_TYPE
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template <> struct value_promoter<TOML_SMALL_FLOAT_TYPE> { using type = double; };
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#endif
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#ifdef TOML_SMALL_INT_TYPE
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template <> struct value_promoter<TOML_SMALL_INT_TYPE> { using type = int64_t; };
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#endif
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template <typename T> using promoted = typename impl::value_promoter<T>::type;
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template <typename T> struct node_type_of_;
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template <> struct node_type_of_<table> { static constexpr auto value = node_type::table; };
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template <> struct node_type_of_<array> { static constexpr auto value = node_type::array; };
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template <> struct node_type_of_<string> { static constexpr auto value = node_type::string; };
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template <> struct node_type_of_<int64_t> { static constexpr auto value = node_type::integer; };
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template <> struct node_type_of_<double> { static constexpr auto value = node_type::floating_point; };
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template <> struct node_type_of_<bool> { static constexpr auto value = node_type::boolean; };
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template <> struct node_type_of_<date> { static constexpr auto value = node_type::date; };
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template <> struct node_type_of_<time> { static constexpr auto value = node_type::time; };
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template <> struct node_type_of_<date_time> { static constexpr auto value = node_type::date_time; };
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template <typename T>
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inline constexpr auto node_type_of = node_type_of_<promoted<typename node_unwrapper<remove_cvref_t<T>>::type>>::value;
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inline constexpr std::string_view low_character_escape_table[] =
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{
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"\\u0000"sv,
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"\\u0001"sv,
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"\\u0002"sv,
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"\\u0003"sv,
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"\\u0004"sv,
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"\\u0005"sv,
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"\\u0006"sv,
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"\\u0007"sv,
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"\\b"sv,
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"\\t"sv,
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"\\n"sv,
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"\\u000B"sv,
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"\\f"sv,
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"\\r"sv,
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"\\u000E"sv,
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"\\u000F"sv,
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"\\u0010"sv,
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"\\u0011"sv,
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"\\u0012"sv,
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"\\u0013"sv,
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"\\u0014"sv,
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"\\u0015"sv,
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"\\u0016"sv,
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"\\u0017"sv,
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"\\u0018"sv,
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"\\u0019"sv,
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"\\u001A"sv,
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"\\u001B"sv,
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"\\u001C"sv,
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"\\u001D"sv,
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"\\u001E"sv,
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"\\u001F"sv,
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};
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inline constexpr std::string_view node_type_friendly_names[] =
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{
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"none"sv,
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"table"sv,
|
|
"array"sv,
|
|
"string"sv,
|
|
"integer"sv,
|
|
"floating-point"sv,
|
|
"boolean"sv,
|
|
"date"sv,
|
|
"time"sv,
|
|
"date-time"sv
|
|
};
|
|
|
|
#define TOML_P2S_DECL(Linkage, Type) \
|
|
template <typename Char> \
|
|
Linkage void print_to_stream(Type, std::basic_ostream<Char>&)
|
|
|
|
TOML_P2S_DECL(TOML_ALWAYS_INLINE, int8_t);
|
|
TOML_P2S_DECL(TOML_ALWAYS_INLINE, int16_t);
|
|
TOML_P2S_DECL(TOML_ALWAYS_INLINE, int32_t);
|
|
TOML_P2S_DECL(TOML_ALWAYS_INLINE, int64_t);
|
|
TOML_P2S_DECL(TOML_ALWAYS_INLINE, uint8_t);
|
|
TOML_P2S_DECL(TOML_ALWAYS_INLINE, uint16_t);
|
|
TOML_P2S_DECL(TOML_ALWAYS_INLINE, uint32_t);
|
|
TOML_P2S_DECL(TOML_ALWAYS_INLINE, uint64_t);
|
|
TOML_P2S_DECL(TOML_ALWAYS_INLINE, float);
|
|
TOML_P2S_DECL(TOML_ALWAYS_INLINE, double);
|
|
TOML_P2S_DECL(inline, const date&);
|
|
TOML_P2S_DECL(inline, const time&);
|
|
TOML_P2S_DECL(inline, time_offset);
|
|
TOML_P2S_DECL(inline, const date_time&);
|
|
|
|
#undef TOML_P2S_DECL
|
|
}
|
|
|
|
namespace toml
|
|
{
|
|
/// \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 toml::string or toml::value<toml::string>.
|
|
template <typename T>
|
|
inline constexpr bool is_string = std::is_same_v<impl::node_of<impl::remove_cvref_t<T>>, value<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::node_of<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::node_of<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::node_of<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::node_of<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::node_of<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::node_of<impl::remove_cvref_t<T>>, value<date_time>>;
|
|
|
|
/// \brief Pretty-prints the value of a node_type to a stream.
|
|
///
|
|
/// \detail \cpp
|
|
/// auto arr = toml::array{ 1, 2.0, "3", false };
|
|
/// for (size_t i = 0; i < arr.size() i++)
|
|
/// std::cout << "Element ["sv << i << "] is: "sv << arr[i].type() << std::endl;
|
|
///
|
|
/// \ecpp
|
|
///
|
|
/// \out
|
|
/// Element [0] is: integer
|
|
/// Element [1] is: floating-point
|
|
/// Element [2] is: string
|
|
/// Element [3] is: boolean
|
|
/// \eout
|
|
template <typename Char>
|
|
TOML_EXTERNAL_LINKAGE
|
|
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();
|
|
}
|
|
}
|
|
|
|
#if !TOML_ALL_INLINE
|
|
extern template TOML_API std::ostream& operator << (std::ostream&, node_type);
|
|
#endif
|
|
|
|
/// \brief Helper class for suppressing move-construction in single-argument array constructors.
|
|
///
|
|
/// \detail \cpp
|
|
/// // desired result: [ [ 42 ] ]
|
|
/// auto bad = toml::array{ toml::array{ 42 } }
|
|
/// auto good = toml::array{ toml::inserter{ toml::array{ 42 } } }
|
|
/// std::cout << "bad: " << bad << std::endl;
|
|
/// std::cout << "good:" << good << std::endl;
|
|
/// \ecpp
|
|
///
|
|
/// \out
|
|
/// bad: [ 42 ]
|
|
/// good: [ [ 42 ] ]
|
|
/// \eout
|
|
///
|
|
/// \see toml::array
|
|
template <typename T>
|
|
struct TOML_TRIVIAL_ABI inserter
|
|
{
|
|
T&& value;
|
|
};
|
|
template <typename T> inserter(T&&) -> inserter<T>;
|
|
}
|