Parser.parseLinkageAttribute

Parses a LinkageAttribute

$(GRAMMAR $(RULEDEF linkageAttribute): $(LITERAL 'extern') $(LITERAL '$(LPAREN)') $(LITERAL Identifier) $(LITERAL '$(RPAREN)') | $(LITERAL 'extern') $(LITERAL '$(LPAREN)') $(LITERAL Identifier) $(LITERAL '-') $(LITERAL Identifier) $(LITERAL '$(RPAREN)') | $(LITERAL 'extern') $(LITERAL '$(LPAREN)') $(LITERAL Identifier) $(LITERAL '++') ($(LITERAL ',') $(RULE typeIdentifierPart) | $(RULE namespaceList) | $(LITERAL 'struct') | $(LITERAL 'class'))? $(LITERAL '$(RPAREN)') ;)