Parser.parseIsExpression

Parses an IsExpression

$(GRAMMAR $(RULEDEF isExpression): $(LITERAL'is') $(LITERAL '$(LPAREN)') $(RULE type) $(LITERAL identifier)? $(LITERAL '$(RPAREN)') | $(LITERAL'is') $(LITERAL '$(LPAREN)') $(RULE type) $(LITERAL identifier)? $(LITERAL ':') $(RULE typeSpecialization) $(LITERAL '$(RPAREN)') | $(LITERAL'is') $(LITERAL '$(LPAREN)') $(RULE type) $(LITERAL identifier)? $(LITERAL '=') $(RULE typeSpecialization) $(LITERAL '$(RPAREN)') | $(LITERAL'is') $(LITERAL '$(LPAREN)') $(RULE type) $(LITERAL identifier)? $(LITERAL ':') $(RULE typeSpecialization) $(LITERAL ',') $(RULE templateParameterList) $(LITERAL '$(RPAREN)') | $(LITERAL'is') $(LITERAL '$(LPAREN)') $(RULE type) $(LITERAL identifier)? $(LITERAL '=') $(RULE typeSpecialization) $(LITERAL ',') $(RULE templateParameterList) $(LITERAL '$(RPAREN)') ;)