private VTableEntry GetOrMakeVTableEntry(string name)
{
VTableEntry ret;
if (vtable.TryGetValue(name, out ret)) return ret;
ret = new VTableEntry(name, vtable.Count);
vtable[name] = ret;
return ret;
}
private void CreateVTableSetterOverride(MethodInfo mi, VTableEntry methField)
{
CodeGen cg = tg.DefineMethodOverride(mi);
Slot callTarget = EmitBaseClassCallCheckForProperties(cg, mi, methField);
callTarget.EmitGet(cg);
cg.EmitThis();
cg.EmitArgGet(0);
cg.EmitConvertToObject(mi.GetParameters()[0].ParameterType);
cg.EmitSymbolId(methField.name);
cg.EmitCall(typeof(UserType), "SetPropertyHelper");
cg.EmitReturn();
cg.Finish();
}
private void CreateVTableEventOverride(EventInfo ei, MethodInfo mi, VTableEntry methField)
{
// override the add/remove method
CodeGen cg = tg.DefineMethodOverride(mi);
Slot callTarget = EmitBaseClassCallCheckForProperties(cg, mi, methField);
callTarget.EmitGet(cg);
cg.EmitThis();
typeField.EmitGet(cg);
cg.EmitArgGet(0);
cg.EmitConvertToObject(mi.GetParameters()[0].ParameterType);
cg.EmitSymbolId(methField.name);
cg.EmitCall(typeof(UserType), "AddRemoveEventHelper");
cg.EmitReturn();
cg.Finish();
}
private void CreateVTableMethodOverride(MethodInfo mi, VTableEntry methField)
{
CodeGen cg = tg.DefineMethodOverride(mi);
Label instanceCall = cg.DefineLabel();
Slot callTarget = cg.GetLocalTmp(typeof(object));
typeField.EmitGet(cg);
cg.EmitThis();
dictField.EmitGet(cg);
cg.EmitSymbolId(methField.name);
cg.EmitInt(methField.index);
callTarget.EmitGetAddr(cg);
// out param populated w/ bound method on success
cg.EmitCall(typeof(UserType), "TryGetNonInheritedMethodHelper");
cg.Emit(OpCodes.Brtrue, instanceCall);
EmitBaseMethodDispatch(mi, cg);
cg.MarkLabel(instanceCall);
int argStart = 0;
Ast.FunctionAttributes attrs = Ast.FunctionAttributes.None;
ParameterInfo[] pis = mi.GetParameters();
if (pis.Length > 0) {
if (pis[0].ParameterType == typeof(ICallerContext))
argStart = 1;
if (pis[pis.Length - 1].IsDefined(typeof(ParamArrayAttribute), false)) {
attrs |= Ast.FunctionAttributes.ArgumentList;
}
}
EmitCallFromClrToPython(cg, callTarget, argStart, attrs);
cg.Finish();
}
/// <summary>
/// Emits code to check if the class has overriden this specific
/// function. For example:
///
/// MyDerivedType.SomeVirtualFunction = ...
/// or
///
/// class MyDerivedType(MyBaseType):
/// def SomeVirtualFunction(self, ...):
///
/// </summary>
internal Slot EmitBaseClassCallCheckForProperties(CodeGen cg, MethodInfo baseMethod, VTableEntry methField)
{
Label instanceCall = cg.DefineLabel();
Slot callTarget = cg.GetLocalTmp(typeof(object));
typeField.EmitGet(cg);
cg.EmitInt(methField.index);
callTarget.EmitGetAddr(cg);
cg.EmitCall(typeof(UserType), "TryGetNonInheritedValueHelper");
cg.Emit(OpCodes.Brtrue, instanceCall);
EmitBaseMethodDispatch(baseMethod, cg);
cg.MarkLabel(instanceCall);
return callTarget;
}
