Method parseYieldExpression

internal/parser/parser.go:4183–4199

()

}

func (p *Parser) parseYieldExpression() *ast.Node {
	pos := p.nodePos()
	// YieldExpression[In] :
	//      yield
	//      yield [no LineTerminator here] [Lexical goal InputElementRegExp]AssignmentExpression[?In, Yield]
	//      yield [no LineTerminator here] * [Lexical goal InputElementRegExp]AssignmentExpression[?In, Yield]
	p.nextToken()
	var result *ast.Node
	if !p.hasPrecedingLineBreak() && (p.token == ast.KindAsteriskToken || p.isStartOfExpression()) {
		result = p.factory.NewYieldExpression(p.parseOptionalToken(ast.KindAsteriskToken), p.parseAssignmentExpressionOrHigher())
	} else {
		// if the next token is not on the same line as yield.  or we don't have an '*' or
		// the start of an expression, then this is just a simple "yield" expression.
		result = p.factory.NewYieldExpression(nil /*asteriskToken*/, nil /*expression*/)
	}
	return p.finishNode(result, pos)
}

func (p *Parser) isParenthesizedArrowFunctionExpression() core.Tristate {
	if p.token == ast.KindOpenParenToken || p.token == ast.KindLessThanToken || p.token == ast.KindAsyncKeyword {