Method parseRelationalExpr

parse.go:236–257

RelationalExpr ::= AdditiveExpr | RelationalExpr '<' AdditiveExpr | RelationalExpr '>' AdditiveExpr | RelationalExpr '<=' AdditiveExpr | RelationalExpr '>=' AdditiveExpr

(n node)

//	| RelationalExpr '<=' AdditiveExpr
//	| RelationalExpr '>=' AdditiveExpr
func (p *parser) parseRelationalExpr(n node) node {
	opnd := p.parseAdditiveExpr(n)
Loop:
	for {
		var op string
		switch p.r.typ {
		case itemLt:
			op = "<"
		case itemGt:
			op = ">"
		case itemLe:
			op = "<="
		case itemGe:
			op = ">="
		default:
			break Loop
		}
		p.next()
		opnd = newOperatorNode(op, opnd, p.parseAdditiveExpr(n))
	}
	return opnd
}

// AdditiveExpr	::= MultiplicativeExpr	| AdditiveExpr '+' MultiplicativeExpr | AdditiveExpr '-' MultiplicativeExpr
func (p *parser) parseAdditiveExpr(n node) node {