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87 lines
2.8 KiB
C++
87 lines
2.8 KiB
C++
// Copyright Toru Niina 2019.
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// Distributed under the MIT License.
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#ifndef TOML11_SOURCE_LOCATION_HPP
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#define TOML11_SOURCE_LOCATION_HPP
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#include "region.hpp"
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#include <cstdint>
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namespace toml
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{
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// A struct to contain location in a toml file.
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// The interface imitates std::experimental::source_location,
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// but not completely the same.
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//
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// It would be constructed by toml::value. It can be used to generate
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// user-defined error messages.
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//
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// - std::uint_least32_t line() const noexcept
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// - returns the line number where the region is on.
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// - std::uint_least32_t column() const noexcept
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// - returns the column number where the region starts.
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// - std::uint_least32_t region() const noexcept
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// - returns the size of the region.
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//
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// +-- line() +-- region of interest (region() == 9)
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// v .---+---.
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// 12 | value = "foo bar"
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// ^
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// +-- column()
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//
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// - std::string const& file_name() const noexcept;
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// - name of the file.
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// - std::string const& line_str() const noexcept;
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// - the whole line that contains the region of interest.
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//
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struct source_location
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{
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public:
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source_location()
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: line_num_(0), column_num_(0), region_size_(0),
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file_name_("unknown file"), line_str_("")
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{}
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explicit source_location(const detail::region_base* reg)
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: line_num_(0), column_num_(0), region_size_(0),
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file_name_("unknown file"), line_str_("")
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{
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if(reg)
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{
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if(reg->line_num() != detail::region_base().line_num())
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{
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line_num_ = static_cast<std::uint_least32_t>(
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std::stoul(reg->line_num()));
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}
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column_num_ = static_cast<std::uint_least32_t>(reg->before() + 1);
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region_size_ = static_cast<std::uint_least32_t>(reg->size());
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file_name_ = reg->name();
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line_str_ = reg->line();
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}
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}
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~source_location() = default;
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source_location(source_location const&) = default;
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source_location(source_location &&) = default;
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source_location& operator=(source_location const&) = default;
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source_location& operator=(source_location &&) = default;
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std::uint_least32_t line() const noexcept {return line_num_;}
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std::uint_least32_t column() const noexcept {return column_num_;}
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std::uint_least32_t region() const noexcept {return region_size_;}
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std::string const& file_name() const noexcept {return file_name_;}
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std::string const& line_str() const noexcept {return line_str_;}
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private:
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std::uint_least32_t line_num_;
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std::uint_least32_t column_num_;
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std::uint_least32_t region_size_;
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std::string file_name_;
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std::string line_str_;
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};
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} // toml
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#endif// TOML11_SOURCE_LOCATION_HPP
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