[boost] Re: Spirit grammar definition

19 Jul 2004


      Ok here is a slightly simplified version of MyGrammar ( MySkipGrammer is  
simply space_p | comment_p( ';' ) ).
But it also generates the same error. The first run works as expected and  
the second run seems to still hold old references.

class MyGrammar : public boost::spirit::grammar<MyGrammar>
{
public:

	std::vector<Group>&		vGroups;
	std::vector<std::string>&	vLibraries;

	MyGrammar( std::vector<std::string>& rvLibraries, std::vector<Group>&  
rvGroups ) : vGroups(rvGroups), vLibraries(rvLibraries) { }

	template <typename ScannerT>
	struct definition
	{
		// rule deklarations here

		Group kCurrentGroup;	
		std::vector<Group> vTmpGroups;
		std::list<Group> vFullGroups;
		std::vector<std::string vLibs;

		definition( const MyGrammar& rkSelf )
		{
			startRule = (*group)[ copy_a( rkSelf.vGroups, vFullGroups )  
][ copy_a( rkSelf.vLibraries, vLibs ) ];

			group =
				groupID[ assign_a( kCurrentGroup.id, id ) ]
				>> ch_p( '{' )
				>> groupDefinition
				>> *( eps_p(as_lower_d[str_p("group")])[ push_back_a( vTmpGroups,  
kCurrentGroup ) ]
					>> group[ my_assign_a( kCurrentGroup, vTmpGroups )  
][ pop_back_a( vTmpGroups ) ]
					)
				>> ch_p( '}' )[ push_front_a( vFullGroups, kCurrentGroup ) ];
	
			groupID =
				as_lower_d[ str_p( "group" ) ]
				>> confix_p( '(', uid[ assign_uid( id ) ], ')' );

			groupDefinition =
				name[ assign_a( kCurrentGroup.name, strName ) ]
				>> description[ assign_a( kCurrentGroup.description, desc ) ];

			name =
				as_lower_d[ str_p( "name" ) ]
				>> ch_p( '=' )
				>> identifier[ assign_a( strName ) ];

			description =
				as_lower_d[ str_p( "description" ) ]
				>> ch_p( '=' )
				>> confix_p( '"', (*anychar_p)[ assign_a( desc ) ], '"' );

			library =
				as_lower_d[ str_p( "library" ) ]
				>> ch_p( '=' )
				>> identifier[ assign_a( lib ) ][ push_back_unique_a( vLibs ) ];


			identifier =
				lexeme_d
				[*	( range_p( 'a', 'z' )
					| range_p( 'A', 'Z' )
					| ch_p('_')
					)
				];

			uid =
				lexeme_d
				[	repeat_p(8)[ range_p( 'A', 'F') | range_p( '0', '9' ) ]
					>> ch_p( '-' )
					>> repeat_p(4)[ range_p( 'A', 'F') | range_p( '0', '9' ) ]
					>> ch_p( '-' )
					>> repeat_p(4)[ range_p( 'a', 'f') | range_p( '0', '9' ) ]
					>> ch_p( '-' )
					>> repeat_p(4)[ range_p( 'A', 'F') | range_p( '0', '9' ) ]
					>> ch_p( '-' )
					>> repeat_p(12)[  range_p( 'A', 'F') | range_p( '0', '9' )]
				];
		}
		const rule<ScannerT>& start() const { return startRule; }
	}
}

[boost] Re: Spirit grammar definition

Nico Massi