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Contents
// Copyright (c) 2016-2020 Dr. Colin Hirsch and Daniel Frey
// Please see LICENSE for license or visit https://github.com/taocpp/PEGTL/
#ifndef TAO_JSON_PEGTL_INTERNAL_ISTREAM_READER_HPP
#define TAO_JSON_PEGTL_INTERNAL_ISTREAM_READER_HPP
#include <istream>
#include <system_error>
#include "../config.hpp"
namespace TAO_JSON_PEGTL_NAMESPACE::internal
{
struct istream_reader
{
explicit istream_reader( std::istream& s ) noexcept
: m_istream( s )
{
}
[[nodiscard]] std::size_t operator()( char* buffer, const std::size_t length )
{
m_istream.read( buffer, std::streamsize( length ) );
if( const auto r = m_istream.gcount() ) {
return std::size_t( r );
}
if( m_istream.eof() ) {
return 0;
}
const auto ec = errno;
throw std::system_error( ec, std::system_category(), "std::istream::read() failed" );
}
std::istream& m_istream;
};
} // namespace TAO_JSON_PEGTL_NAMESPACE::internal
#endif
Version data entries
24 entries across 24 versions & 1 rubygems