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