Problems with regexp expressions in a ordered syntax

(execution(private override w{5,6} $instanceof{ns.next_ns*.*.ext_next.*kalle*}->*kalle(int iVal1,kalle.ho*.Stringa csVal2)) AND !execution(* void ¤pelle->new(..)))

I'm generating C# code and the lexer grammar is in the end of the letter (not functional). How do i e.g. distingwish between $instanceof{regexp} and the contained regexp since both are allowed to use {} etc. If I'm not allowing {,( this lexer grammar seems to be ok, but if I do it cannot distingwish litterals and identifiers.

Many regards,
Mario Toffia

Lexer

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							Grammar ExpressionLexer
							

							

							ANTLR
							-generated HTML file from grammar.g
							

							

								

								Terence Parr,
								MageLang Institute
								

								

								ANTLR Version 2.7.4; 1989-1999
								

							
						
					
				
			
			

			
				

				

				Definition of lexer ExpressionLexer, which is a subclass of CharScanner.
				

				

				/** Lexer nextToken rule:
				

				*  The lexer nextToken rule is synthesized from all of the user-defined
				

				*  lexer rules.  It logically consists of one big alternative block with
				

				*  each user-defined rule being an alternative.
				

				*/
				

				mOPEN_PAREN
				

				|
				mCLOSE_PAREN
				

				|
				mWILDCARD_PARAM_ARGS
				

				|
				mCOMMA
				

				|
				mMEMBER_ACESS_TOKEN
				

				|
				mLCURLY
				

				|
				mRCURLY
				

				|
				mSTAR
				

				|
				mNOT_SYM
				

				|
				mOR_SYM
				

				|
				mAND_SYM
				

				|
				mATTRIBUTE
				

				|
				mIDENT
				

				|
				mWS
				

				mOPEN_PAREN
				

				: '('
				

				;
				

				

				mCLOSE_PAREN
				

				: ')'
				

				;
				

				

				mWILDCARD_PARAM_ARGS
				

				: "(..)"
				

				;
				

				

				mCOMMA
				

				: ','
				

				;
				

				

				mMEMBER_ACESS_TOKEN
				

				: "->"
				

				;
				

				

				mLCURLY
				

				: '{'
				

				;
				

				

				mRCURLY
				

				: '}'
				

				;
				

				

				mSTAR
				

				: '*'
				

				;
				

				

				mNOT_SYM
				

				: '!'
				

				;
				

				

				mOR_SYM
				

				: '|'
				

				;
				

				

				mAND_SYM
				

				: '&'
				

				;
				

				

				mATTRIBUTE
				

				: ( '¤'
				mIDENT
				)
				

				;
				

				

				mIDENT
				

				: (    'a'..'z'
				

				|    'A'..'Z'
				

				| '_'
				

				| '$'
				

				| '@'
				

				| '^'
				

				| ''
				

				)
				

				(    'a'..'z'
				

				|    'A'..'Z'
				

				| '_'
				

				|    '0'..'9'
				

				| '$'
				

				| '.'
				

				| '^'
				

				| ''
				

				| '['
				

				| ']'
				

				| '='
				

				| '?'
				

				| '
				<'
				

				| '>'
				

				| '*'
				

				| '!'
				

				| '|'
				

				| '&'
				

				| '/'
				

				)*
				

				;
				

				

				mWS
				

				: ( ' '
				

				| ' '
				

				| 'f'
				

				| ( "
				

				"
				

				| '
				

				'
				

				| '
				

				'
				

				)
				

				

				)+
				

				

				;