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// file : CCF/IDL2/Parsing/Elements.hpp
// author : Boris Kolpackov <boris@dre.vanderbilt.edu>
// cvs-id : $Id$
#ifndef CCF_IDL2_PARSING_ELEMENTS_HPP
#define CCF_IDL2_PARSING_ELEMENTS_HPP
#include <string>
#include <boost/spirit.hpp>
#include "CCF/IDL2/Token.hpp"
namespace CCF
{
namespace IDL2
{
namespace Parsing
{
using namespace boost::spirit;
typedef
TokenList::iterator
Iterator;
typedef
scanner<Iterator, scanner_policies<> >
Scanner;
typedef
rule<Scanner>
Rule;
//
//
//
template <typename Type>
struct IdentityParser : public parser <IdentityParser<Type> >
{
typedef
IdentityParser
self_t;
IdentityParser (std::string lexeme)
: lexeme_ (lexeme)
{
}
typename parser_result<self_t, Scanner>::type
parse(Scanner const& scan) const
{
if (!scan.at_end())
{
TokenPtr t = *scan;
if(ReferenceCounting::strict_cast<Type> (t) != 0 &&
lexeme_ == t->lexeme ())
{
Iterator save(scan.first);
++scan;
return scan.create_match(1, t, save, scan.first);
}
}
return scan.no_match();
}
private:
std::string lexeme_;
};
typedef
IdentityParser<Keyword>
KeywordParser;
typedef
IdentityParser<Punctuation>
PunctuationParser;
typedef
IdentityParser<Operator>
OperatorParser;
//
//
//
template <typename Type>
struct TypeParser : public parser <TypeParser<Type> >
{
typedef
TypeParser
self_t;
typename parser_result<self_t, Scanner>::type
parse(Scanner const& scan) const
{
if (!scan.at_end())
{
TokenPtr t = *scan;
if(ReferenceCounting::strict_cast<Type> (t) != 0)
{
Iterator save(scan.first);
++scan;
return scan.create_match(1, t, save, scan.first);
}
}
return scan.no_match();
}
};
typedef
TypeParser<EndOfStream>
EndOfStreamParser;
typedef
TypeParser<Identifier>
IdentifierParser;
typedef
TypeParser<SimpleIdentifier>
SimpleIdentifierParser;
typedef
TypeParser<ScopedIdentifier>
ScopedIdentifierParser;
// Literal parsers.
//
typedef
TypeParser<BooleanLiteral>
BooleanLiteralParser;
typedef
TypeParser<CharacterLiteral>
CharacterLiteralParser;
typedef
TypeParser<IntegerLiteral>
IntegerLiteralParser;
typedef
TypeParser<StringLiteral>
StringLiteralParser;
//
//
//
inline bool
parse (Iterator const& first_,
Iterator const& last,
Rule const& rule)
{
Iterator first = first_;
Scanner scan(first, last);
match<nil_t> hit = rule.parse(scan);
bool result = parse_info<Iterator>(
first, hit, hit && (first == last), hit.length()).full;
return result;
}
}
}
}
#endif // CCF_IDL2_PARSING_ELEMENTS_HPP
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