Method parseUnaryExpression

parser/expression.go:853–889

()

}

func (self *_parser) parseUnaryExpression() ast.Expression {

	switch self.token {
	case token.PLUS, token.MINUS, token.NOT, token.BITWISE_NOT:
		fallthrough
	case token.DELETE, token.VOID, token.TYPEOF:
		tkn := self.token
		idx := self.idx
		self.next()
		return &ast.UnaryExpression{
			Operator: tkn,
			Idx:      idx,
			Operand:  self.parseUnaryExpression(),
		}
	case token.AWAIT:
		if self.scope.allowAwait {
			idx := self.idx
			self.next()
			if !self.scope.inAsync {
				self.errorUnexpectedToken(token.AWAIT)
				return &ast.BadExpression{
					From: idx,
					To:   self.idx,
				}
			}
			if self.scope.inFuncParams {
				self.error(idx, "Illegal await-expression in formal parameters of async function")
			}
			return &ast.AwaitExpression{
				Await:    idx,
				Argument: self.parseUnaryExpression(),
			}
		}
	}

	return self.parseUpdateExpression()
}

func (self *_parser) parseExponentiationExpression() ast.Expression {
	parenthesis := self.token == token.LEFT_PARENTHESIS