Parser.parseRelExpression

Parses a RelExpression

$(GRAMMAR $(RULEDEF relExpression): $(RULE shiftExpression) | $(RULE relExpression) $(RULE relOperator) $(RULE shiftExpression) ; $(RULEDEF relOperator): $(LITERAL '<') | $(LITERAL '<=') | $(LITERAL '>') | $(LITERAL '>=') | $(LITERAL '!<>=') | $(LITERAL '!<>') | $(LITERAL '<>') | $(LITERAL '<>=') | $(LITERAL '!>') | $(LITERAL '!>=') | $(LITERAL '!<') | $(LITERAL '!<=') ;)