516b8e2096
also: - removed `TOML_LARGE_FILES` - removed unnecessary template machinery (esp. where ostreams were involved) - made all overloaded operators 'hidden friends' - documentation fixes - version bump - this will form the foundation of v3
125 lines
3.3 KiB
C++
125 lines
3.3 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) 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 "formatter.h"
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#include "header_start.h"
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TOML_NAMESPACE_START
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{
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/// \brief A wrapper for printing TOML objects out to a stream as formatted JSON.
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///
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/// \detail \cpp
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/// auto some_toml = toml::parse(R"(
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/// [fruit]
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/// apple.color = "red"
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/// apple.taste.sweet = true
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///
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/// [fruit.apple.texture]
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/// smooth = true
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/// )"sv);
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/// std::cout << toml::json_formatter{ some_toml } << "\n";
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///
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/// \ecpp
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///
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/// \out
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/// {
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/// "fruit" : {
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/// "apple" : {
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/// "color" : "red",
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/// "taste" : {
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/// "sweet" : true
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/// },
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/// "texture" : {
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/// "smooth" : true
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/// }
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/// }
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/// }
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/// }
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/// \eout
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class json_formatter : impl::formatter
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{
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private:
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/// \cond
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using base = impl::formatter;
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TOML_API
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void print(const toml::table&);
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TOML_API
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void print(const toml::array&);
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TOML_API
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void print();
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/// \endcond
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public:
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/// \brief The default flags for a json_formatter.
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static constexpr format_flags default_flags = format_flags::quote_dates_and_times;
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/// \brief Constructs a JSON formatter and binds it to a TOML object.
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///
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/// \param source The source TOML object.
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/// \param flags Format option flags.
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TOML_NODISCARD_CTOR
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explicit json_formatter(const toml::node& source, format_flags flags = default_flags) noexcept
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: base{ source, flags }
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{}
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#if defined(DOXYGEN) || (TOML_PARSER && !TOML_EXCEPTIONS)
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/// \brief Constructs a JSON formatter and binds it to a toml::parse_result.
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///
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/// \availability This constructor is only available when exceptions are disabled.
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///
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/// \attention Formatting a failed parse result will simply dump the error message out as-is.
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/// This will not be valid JSON, but at least gives you something to log or show up in diagnostics:
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/// \cpp
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/// std::cout << toml::json_formatter{ toml::parse("a = 'b'"sv) } // ok
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/// << "\n\n"
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/// << toml::json_formatter{ toml::parse("a = "sv) } // malformed
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/// << "\n";
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/// \ecpp
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/// \out
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/// {
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/// "a" : "b"
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/// }
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///
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/// Error while parsing key-value pair: encountered end-of-file
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/// (error occurred at line 1, column 5)
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/// \eout
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/// Use the library with exceptions if you want to avoid this scenario.
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///
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/// \param result The parse result.
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/// \param flags Format option flags.
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TOML_NODISCARD_CTOR
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explicit json_formatter(const toml::parse_result& result, format_flags flags = default_flags) noexcept
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: base{ result, flags }
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{}
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#endif
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/// \brief Prints the bound TOML object out to the stream as JSON.
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friend std::ostream& operator<<(std::ostream& lhs, json_formatter& rhs)
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{
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rhs.attach(lhs);
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rhs.print();
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rhs.detach();
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return lhs;
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}
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/// \brief Prints the bound TOML object out to the stream as JSON (rvalue overload).
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friend std::ostream& operator<<(std::ostream& lhs, json_formatter&& rhs)
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{
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return lhs << rhs; // as lvalue
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}
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};
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}
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TOML_NAMESPACE_END;
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#include "header_end.h"
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