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119 lines
2.9 KiB
C++
Executable file
119 lines
2.9 KiB
C++
Executable file
// Copyright (c) 2014-2022 Dr. Colin Hirsch and Daniel Frey
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// Please see LICENSE for license or visit https://github.com/taocpp/PEGTL/
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#ifndef TAO_PEGTL_PARSE_ERROR_HPP
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#define TAO_PEGTL_PARSE_ERROR_HPP
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#include <cstddef>
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#include <memory>
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#include <stdexcept>
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#include <string>
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#include <string_view>
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#include <utility>
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#include <vector>
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#include "config.hpp"
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#include "position.hpp"
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namespace TAO_PEGTL_NAMESPACE
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{
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namespace internal
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{
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class parse_error
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{
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private:
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std::string m_msg;
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std::size_t m_prefix = 0;
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std::vector< position > m_positions;
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public:
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explicit parse_error( const char* msg )
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: m_msg( msg )
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{}
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[[nodiscard]] const char* what() const noexcept
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{
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return m_msg.c_str();
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}
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[[nodiscard]] std::string_view message() const noexcept
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{
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return { m_msg.data() + m_prefix, m_msg.size() - m_prefix };
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}
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[[nodiscard]] const std::vector< position >& positions() const noexcept
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{
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return m_positions;
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}
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void add_position( position&& p )
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{
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const auto prefix = to_string( p );
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m_msg = prefix + ": " + m_msg;
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m_prefix += prefix.size() + 2;
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m_positions.emplace_back( std::move( p ) );
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}
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};
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} // namespace internal
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class parse_error
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: public std::runtime_error
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{
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private:
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std::shared_ptr< internal::parse_error > m_impl;
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public:
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parse_error( const char* msg, position p )
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: std::runtime_error( msg ),
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m_impl( std::make_shared< internal::parse_error >( msg ) )
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{
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m_impl->add_position( std::move( p ) );
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}
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parse_error( const std::string& msg, position p )
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: parse_error( msg.c_str(), std::move( p ) )
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{}
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template< typename ParseInput >
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parse_error( const char* msg, const ParseInput& in )
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: parse_error( msg, in.position() )
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{}
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template< typename ParseInput >
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parse_error( const std::string& msg, const ParseInput& in )
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: parse_error( msg, in.position() )
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{}
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[[nodiscard]] const char* what() const noexcept override
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{
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return m_impl->what();
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}
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[[nodiscard]] std::string_view message() const noexcept
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{
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return m_impl->message();
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}
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[[nodiscard]] const std::vector< position >& positions() const noexcept
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{
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return m_impl->positions();
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}
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void add_position( position&& p )
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{
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if( m_impl.use_count() > 1 ) {
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m_impl = std::make_shared< internal::parse_error >( *m_impl );
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}
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m_impl->add_position( std::move( p ) );
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}
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void add_position( const position& p )
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{
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add_position( position( p ) );
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}
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};
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} // namespace TAO_PEGTL_NAMESPACE
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#endif
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