CSG.h

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#pragma once
 
#include <grammar/ContextSensitive/CSG.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 SymbolType >
struct stringApi < grammar::CSG < SymbolType > > {
    static grammar::CSG < SymbolType > parse ( ext::istream & input );
    static bool first ( ext::istream & input );
    static void compose ( ext::ostream & output, const grammar::CSG < SymbolType > & grammar );
};
 
template<class SymbolType >
grammar::CSG < SymbolType > stringApi < grammar::CSG < SymbolType > >::parse ( ext::istream & input ) {
    grammar::GrammarFromStringLexer::Token token = grammar::GrammarFromStringLexer::next(input);
    if(token.type != grammar::GrammarFromStringLexer::TokenType::CSG)
        throw exception::CommonException("Unrecognised CSG token.");
 
    return grammar::GrammarFromStringParserCommon::parsePreservingCSLikeGrammar < grammar::CSG < SymbolType > > ( input );
}
 
template<class SymbolType >
bool stringApi < grammar::CSG < SymbolType > >::first ( ext::istream & input ) {
    grammar::GrammarFromStringLexer::Token token = grammar::GrammarFromStringLexer::next ( input );
    bool res = token.type == grammar::GrammarFromStringLexer::TokenType::CSG;
    grammar::GrammarFromStringLexer::putback ( input, token );
    return res;
}
 
template<class SymbolType >
void stringApi < grammar::CSG < SymbolType > >::compose ( ext::ostream & output, const grammar::CSG < SymbolType > & grammar ) {
    output << "CSG";
    grammar::GrammarToStringComposerCommon::composePreservingCSLikeGrammar ( output, grammar );
}
 
} /* namespace core */