public JsNode VisitMethodGroupResolveResult(MethodGroupResolveResult res)
{
var info = res.GetInfo();
IMethod me;
if (info != null && info.Conversion != null && info.Conversion.Method != null)
{
me = info.Conversion.Method;
}
else //happens when invoking a method with overloads, and a parameter is dynamic
{
var list = res.Methods.ToList();
if (list.Count == 0)
{
throw new Exception("Method group not resolved to any method");
}
else if (list.Count == 1)
{
me = list[0];
}
else
{
me = list[0];
}
//TODO: verify all methods has the same js name
}
var isExtensionMethodStyle = me.IsExtensionMethod && !(res.TargetResult is TypeResolveResult) && info != null && info.Conversion != null && info.Conversion.DelegateCapturesFirstArgument;//TODO: IsExtensionMethodStyle(new CsInvocationExpression { entity = me, expression = node });
JsExpression firstPrm = null;
if (isExtensionMethodStyle)
{
firstPrm = (JsExpression)Visit(res.TargetResult);
}
var node2 = SkJs.EntityToMember(me);
JsExpression node3;
JsExpression instanceContext = null;
if (me.IsStatic || res.TargetResult == null) //getting ThisResolveResult even on static methods, getting TargetResult=null when MethodGroupResolveResult when using delegates
{
node3 = node2;
}
else
{
instanceContext = VisitExpression(res.TargetResult);
node3 = instanceContext.Member(node2);
}
if (info != null && (instanceContext != null || firstPrm != null))
{
var conv = info.Conversion;
if (info.ConversionTargetType != null && !UseNativeFunctions(info.ConversionTargetType))//delegate type
{
var parentMethod = info.Nodes.FirstOrDefault().GetCurrentMethod();
if (parentMethod == null || !Sk.ForceDelegatesAsNativeFunctions(parentMethod))
{
if (parentMethod == null)
{
Log.Warn(info.Nodes.FirstOrDefault(), "GetParentMethod() returned null");
}
var func = (JsExpression)node2;
if (instanceContext != null)
{
node3 = CreateJsDelegate(instanceContext, func);
}
else if (firstPrm != null)
{
node3 = CreateJsExtensionDelegate(firstPrm, func);
}
}
}
}
return(node3);
}
JsNode CreateJsDelegateIfNeeded(JsFunction func, IMember currentMember, IType delType, bool isAnonymous)
{
if (currentMember != null && !currentMember.IsStatic && !UseNativeFunctions(delType) && !Sk.ForceDelegatesAsNativeFunctions(currentMember))
{
var instanceContext = new JsThis();
JsExpression wrapper;
if (isAnonymous)
{
wrapper = CreateAnonymousJsDelegate(instanceContext, func);
}
else
{
wrapper = CreateJsDelegate(instanceContext, func);
}
return(wrapper);
}
else
{
return(func);
}
}
public JsNode VisitMethodGroupResolveResult(MethodGroupResolveResult res)
{
var info = res.GetInfo();
IMethod me;
if (info != null && info.Conversion != null && info.Conversion.Method != null)
{
me = info.Conversion.Method;
}
else //happens when invoking a method with overloads, and a parameter is dynamic
{
var list = res.Methods.ToList();
if (list.Count == 0)
{
throw new Exception("Method group not resolved to any method");
}
else if (list.Count == 1)
{
me = list[0];
}
else
{
me = list[0];
}
//TODO: verify all methods has the same js name
}
var isExtensionMethodStyle = me.IsExtensionMethod && !(res.TargetResult is TypeResolveResult) && info != null && info.Conversion != null && info.Conversion.DelegateCapturesFirstArgument;//TODO: IsExtensionMethodStyle(new CsInvocationExpression { entity = me, expression = node });
JsExpression firstPrm = null;
if (isExtensionMethodStyle)
{
firstPrm = (JsExpression)Visit(res.TargetResult);
}
var node2 = SkJs.EntityToMember(me);
JsExpression node3;
JsExpression instanceContext = null;
if (me.IsStatic || res.TargetResult == null) //getting ThisResolveResult even on static methods, getting TargetResult=null when MethodGroupResolveResult when using delegates
{
node3 = node2;
}
else
{
instanceContext = VisitExpression(res.TargetResult);
node3 = instanceContext.Member(node2);
}
if (info != null && (instanceContext != null || firstPrm != null))
{
if (info.ConversionTargetType != null && !UseNativeFunctions(info.ConversionTargetType))//delegate type
{
var parentMethod = info.Nodes.FirstOrDefault().GetCurrentMethod();
if (parentMethod == null || !Sk.ForceDelegatesAsNativeFunctions(parentMethod))
{
if (parentMethod == null)
{
Log.Warn(info.Nodes.FirstOrDefault(), "GetParentMethod() returned null");
}
var func = (JsExpression)node2;
if (instanceContext != null)
{
node3 = CreateJsDelegate(instanceContext, func);
}
else if (firstPrm != null)
{
node3 = CreateJsExtensionDelegate(firstPrm, func);
}
}
}
}
// 其实以下的处理，也可以改代码，改成 Lambda 写法即可
// 这样子引用的并不是同一个函数，可能会造成内存泄露
if (res.TypeArguments.Count > 0 && info.Conversion.IsImplicit && me is SpecializedMethod)
{
var delegateFunc = node3 as JsInvocationExpression;
var sme = (SpecializedMethod)me;
var pars = sme.TypeArguments.Select(type => SkJs.EntityTypeRefToMember(type, false)).ToList();
pars.AddRange(sme.Parameters.Select(t => new JsCodeExpression
{
Code = JsIdentifier(t.Name),
}));
var body = delegateFunc == null?node3.Invoke(pars.ToArray()) : delegateFunc.Arguments[1].Invoke(pars.ToArray());
var func = new JsFunction()
{
Parameters = sme.Parameters.Select(t => JsIdentifier(t.Name)).ToList(),
};
JsStatement st;
if (sme.ReturnType.IsVoid())
{
st = new JsExpressionStatement {
Expression = body
};
}
else
{
st = new JsReturnStatement {
Expression = body
};
}
func.Block = new JsBlock {
Statements = new List <JsStatement> {
st
}
};
if (delegateFunc == null)
{
node3 = func;
}
else
{
delegateFunc.Arguments[1] = func;
}
}
return(node3);
}