Method subExpression

parser.go:258–279

(limit int)

const unaryPriority = 8

func (p *parser) subExpression(limit int) (e exprDesc, op int) {
	p.enterLevel()
	if u := unaryOp(p.t); u != oprNoUnary {
		line := p.lineNumber
		p.next()
		e, _ = p.subExpression(unaryPriority)
		e = p.function.Prefix(u, e, line)
	} else {
		e = p.simpleExpression()
	}
	op = binaryOp(p.t)
	for op != oprNoBinary && priority[op].left > limit {
		line := p.lineNumber
		p.next()
		e = p.function.Infix(op, e)
		e2, next := p.subExpression(priority[op].right)
		e = p.function.Postfix(op, e, e2, line)
		op = next
	}
	p.leaveLevel()
	return
}

func (p *parser) expression() (e exprDesc) {
	e, _ = p.subExpression(0)