json_formatter.hpp

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//# This file is a part of toml++ and is subject to the the terms of the MIT license.
//# Copyright (c) Mark Gillard <mark.gillard@outlook.com.au>
//# See https://github.com/marzer/tomlplusplus/blob/master/LICENSE for the full license text.
// SPDX-License-Identifier: MIT
#pragma once
 
#include "preprocessor.hpp"
#if TOML_ENABLE_FORMATTERS
 
#include "formatter.hpp"
#include "header_start.hpp"
 
TOML_NAMESPACE_START
{
    class TOML_EXPORTED_CLASS json_formatter : impl::formatter
    {
      private:
 
        using base = impl::formatter;
 
        TOML_EXPORTED_MEMBER_FUNCTION
        void print(const toml::table&);
 
        TOML_EXPORTED_MEMBER_FUNCTION
        void print(const toml::array&);
 
        TOML_EXPORTED_MEMBER_FUNCTION
        void print();
 
        static constexpr impl::formatter_constants constants = {
            format_flags::quote_dates_and_times,                                          // mandatory
            format_flags::allow_literal_strings | format_flags::allow_multi_line_strings, // ignored
            "Infinity"sv,
            "-Infinity"sv,
            "NaN"sv,
            "true"sv,
            "false"sv
        };
 
 
      public:
        static constexpr format_flags default_flags = constants.mandatory_flags               //
                                                    | format_flags::quote_infinities_and_nans //
                                                    | format_flags::allow_unicode_strings     //
                                                    | format_flags::indentation;
 
        TOML_NODISCARD_CTOR
        explicit json_formatter(const toml::node& source, format_flags flags = default_flags) noexcept
            : base{ &source, nullptr, constants, { flags, "    "sv } }
        {}
 
#if TOML_DOXYGEN || (TOML_ENABLE_PARSER && !TOML_EXCEPTIONS)
 
        TOML_NODISCARD_CTOR
        explicit json_formatter(const toml::parse_result& result, format_flags flags = default_flags) noexcept
            : base{ nullptr, &result, constants, { flags, "    "sv } }
        {}
 
#endif
 
        friend std::ostream& operator<<(std::ostream& lhs, json_formatter& rhs)
        {
            rhs.attach(lhs);
            rhs.print();
            rhs.detach();
            return lhs;
        }
 
        friend std::ostream& operator<<(std::ostream& lhs, json_formatter&& rhs)
        {
            return lhs << rhs; // as lvalue
        }
    };
}
TOML_NAMESPACE_END;
 
#include "header_end.hpp"
#endif // TOML_ENABLE_FORMATTERS