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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_PARSER
#include "std_except.hpp"
#include "source_region.hpp"
#include "print_to_stream.hpp"
#include "header_start.hpp"
#if TOML_DOXYGEN || !TOML_EXCEPTIONS
#define TOML_PARSE_ERROR_BASE
#else
#define TOML_PARSE_ERROR_BASE : public std::runtime_error
#endif
TOML_NAMESPACE_START
{
TOML_ABI_NAMESPACE_BOOL(TOML_EXCEPTIONS, ex, noex);
/// \brief An error generated when parsing fails.
///
/// \remarks This class inherits from std::runtime_error when exceptions are enabled.
/// The public interface is the same regardless of exception mode.
class parse_error TOML_PARSE_ERROR_BASE
{
private:
#if !TOML_EXCEPTIONS
std::string description_;
#endif
source_region source_;
public:
#if TOML_EXCEPTIONS
TOML_NODISCARD_CTOR
TOML_ATTR(nonnull)
parse_error(const char* desc, source_region&& src) noexcept //
: std::runtime_error{ desc },
source_{ std::move(src) }
{}
TOML_NODISCARD_CTOR
TOML_ATTR(nonnull)
parse_error(const char* desc, const source_region& src) noexcept //
: parse_error{ desc, source_region{ src } }
{}
TOML_NODISCARD_CTOR
TOML_ATTR(nonnull)
parse_error(const char* desc, const source_position& position, const source_path_ptr& path = {}) noexcept
: parse_error{ desc, source_region{ position, position, path } }
{}
#else
TOML_NODISCARD_CTOR
parse_error(std::string&& desc, source_region&& src) noexcept //
: description_{ std::move(desc) },
source_{ std::move(src) }
{}
TOML_NODISCARD_CTOR
parse_error(std::string&& desc, const source_region& src) noexcept //
: parse_error{ std::move(desc), source_region{ src } }
{}
TOML_NODISCARD_CTOR
parse_error(std::string&& desc, const source_position& position, const source_path_ptr& path = {}) noexcept
: parse_error{ std::move(desc), source_region{ position, position, path } }
{}
#endif
/// \brief Returns a textual description of the error.
/// \remark The backing string is guaranteed to be null-terminated.
TOML_NODISCARD
std::string_view description() const noexcept
{
#if TOML_EXCEPTIONS
return std::string_view{ what() };
#else
return description_;
#endif
}
/// \brief Returns the region of the source document responsible for the error.
TOML_NODISCARD
const source_region& source() const noexcept
{
return source_;
}
/// \brief Prints a parse_error to a stream.
///
/// \detail \cpp
/// try
/// {
/// auto tbl = toml::parse("enabled = trUe"sv);
/// }
/// catch (const toml::parse_error & err)
/// {
/// std::cerr << "Parsing failed:\n"sv << err << "\n";
/// }
/// \ecpp
///
/// \out
/// Parsing failed:
/// Encountered unexpected character while parsing boolean; expected 'true', saw 'trU'
/// (error occurred at line 1, column 13)
/// \eout
///
/// \tparam Char The output stream's underlying character type. Must be 1 byte in size.
/// \param lhs The stream.
/// \param rhs The parse_error.
///
/// \returns The input stream.
friend std::ostream& operator<<(std::ostream& lhs, const parse_error& rhs)
{
impl::print_to_stream(lhs, rhs.description());
impl::print_to_stream(lhs, "\n\t(error occurred at "sv);
impl::print_to_stream(lhs, rhs.source());
impl::print_to_stream(lhs, ")"sv);
return lhs;
}
};
TOML_ABI_NAMESPACE_END; // TOML_EXCEPTIONS
}
TOML_NAMESPACE_END;
#undef TOML_PARSE_ERROR_BASE
#include "header_end.hpp"
#endif // TOML_ENABLE_PARSER
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