public void VisitBinaryOperatorExpression(BinaryOperatorExpression node)
{
VisitChildren(node);
// Force certain operations on integers to stay integers afterwards.
// This allows JavaScript JITs to omit overflow deoptimizations.
if (!WillConvertOperandsToIntegers(node) && !WillConvertOperandsToIntegers(UnparenthesizedParent(node))) {
var result = resolver.Resolve(node) as OperatorResolveResult;
if (result != null && IsIntegerTypeCode(TypeCode(result.Type))) {
var temp = new NullReferenceExpression();
node.ReplaceWith(temp);
temp.ReplaceWith(new BinaryOperatorExpression(node, BinaryOperatorType.BitwiseOr, new PrimitiveExpression(0)));
}
}
}
public override void VisitNullReferenceExpression(NullReferenceExpression e)
{
var call = e.Parent as InvocationExpression;
if (call != null)
{
// 解决 null 参数引起的调用不明问题：???? 如何判断有必要
var ti = e.Annotation<TypeInformation>();
e.ReplaceWith(e.Clone().CastTo(AstBuilder.ConvertType(ti.ExpectedType)));
}
base.VisitNullReferenceExpression(e);
}