LG.h

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#pragma once
 
#include <grammar/ContextFree/LG.h>
#include <core/stringApi.hpp>
 
#include <grammar/GrammarFromStringLexer.h>
 
#include <grammar/string/common/GrammarFromStringParserCommon.h>
#include <grammar/string/common/GrammarToStringComposerCommon.h>
 
namespace core {
 
template < class TerminalSymbolType, class NonterminalSymbolType >
struct stringApi < grammar::LG < TerminalSymbolType, NonterminalSymbolType > > {
    static grammar::LG < TerminalSymbolType, NonterminalSymbolType > parse ( ext::istream & input );
    static bool first ( ext::istream & input );
    static void compose ( ext::ostream & output, const grammar::LG < TerminalSymbolType, NonterminalSymbolType > & grammar );
};
 
template < class TerminalSymbolType, class NonterminalSymbolType >
grammar::LG < TerminalSymbolType, NonterminalSymbolType > stringApi < grammar::LG < TerminalSymbolType, NonterminalSymbolType > >::parse ( ext::istream & input ) {
    grammar::GrammarFromStringLexer::Token token = grammar::GrammarFromStringLexer::next(input);
    if(token.type != grammar::GrammarFromStringLexer::TokenType::LG)
        throw exception::CommonException("Unrecognised LG token.");
 
    return grammar::GrammarFromStringParserCommon::parseCFLikeGrammar < grammar::LG < TerminalSymbolType, NonterminalSymbolType > > ( input );
}
 
template < class TerminalSymbolType, class NonterminalSymbolType >
bool stringApi < grammar::LG < TerminalSymbolType, NonterminalSymbolType > >::first ( ext::istream & input ) {
    grammar::GrammarFromStringLexer::Token token = grammar::GrammarFromStringLexer::next ( input );
    bool res = token.type == grammar::GrammarFromStringLexer::TokenType::LG;
    grammar::GrammarFromStringLexer::putback ( input, token );
    return res;
}
 
template < class TerminalSymbolType, class NonterminalSymbolType >
void stringApi < grammar::LG < TerminalSymbolType, NonterminalSymbolType > >::compose ( ext::ostream & output, const grammar::LG < TerminalSymbolType, NonterminalSymbolType > & grammar ) {
    output << "LG";
    grammar::GrammarToStringComposerCommon::composeCFLikeGrammar ( output, grammar );
}
 
} /* namespace core */