protected internal override Delegate CreateDelegate()
{
/*
* Type elementType = TargetType.GetElementType();
* Generator
* .ldarg_0 // load array
* .castclass(TargetType) // (T[])array
* .ldarg_1 // load index
* .ldarg_2 // load value
* .CastFromObject(elementType) // (unbox | cast) value
* .stelem(elementType) // array[index] = value
* .ret();
* return Method.CreateDelegate(typeof(ArrayElementSetter));
*/
Type elementType = TargetType.GetElementType();
Gen.Emit(OpCodes.Ldarg_0);
Gen.Emit(OpCodes.Castclass, TargetType);
Gen.Emit(OpCodes.Ldarg_1);
Gen.Emit(OpCodes.Ldarg_2);
if (elementType == typeof(object))
{
Gen.Emit(elementType.IsValueType ? OpCodes.Unbox_Any : OpCodes.Castclass, elementType);
}
Gen.Emit(OpCodes.Stelem, elementType);
Gen.Emit(OpCodes.Ret);
return(Method.CreateDelegate(typeof(ArrayElementSetter)));
}
protected internal override Delegate CreateDelegate()
{
Type elementType = TargetType.GetElementType();
Gen.Emit(OpCodes.Ldarg_0);
Gen.Emit(OpCodes.Castclass, TargetType);
Gen.Emit(OpCodes.Ldarg_1);
Gen.Emit(OpCodes.Ldelem, elementType);
if (TargetType.IsValueType)
{
Gen.Emit(OpCodes.Box, TargetType);
}
Gen.Emit(OpCodes.Ret);
return(Method.CreateDelegate(typeof(ArrayElementGetter)));
}
protected internal override Delegate CreateDelegate()
{
if (ReflectionUtils.IsTargetTypeStruct(TargetType) && ReflectionUtils.IsEmptyTypeList(ParameterTypes))
{
// No-arg struct needs special initialization
Emit.DeclareLocal(TargetType); // TargetType tmp
Emit.ldloca_s(0) // &tmp
.initobj(TargetType) // init_obj(&tmp)
.ldloc_0.end(); // load tmp
}
else if (TargetType.IsArray)
{
Emit.ldarg_0 // load args[] (method arguments)
.ldc_i4_0 // load 0
.ldelem_ref // load args[0] (length)
.unbox_any(typeof(int)) // unbox stack
.newarr(TargetType.GetElementType()); // new T[args[0]]
}
else
{
ConstructorInfo ctorInfo = TargetType.GetConstructor(Flags, null, ParameterTypes, null);
byte startUsableLocalIndex = 0;
if (ReflectionUtils.HasRefParam(ParameterTypes))
{
startUsableLocalIndex = CreateLocalsForByRefParams(0, ctorInfo); // create by_ref_locals from argument array
Emit.DeclareLocal(TargetType); // TargetType tmp;
}
PushParamsOrLocalsToStack(0); // push arguments and by_ref_locals
Emit.newobj(ctorInfo); // ctor (<stack>)
if (ReflectionUtils.HasRefParam(ParameterTypes))
{
Emit.stloc(startUsableLocalIndex); // tmp = <stack>;
AssignByRefParamsToArray(0); // store by_ref_locals back to argument array
Emit.ldloc(startUsableLocalIndex); // tmp
}
}
Emit.boxIfValueType(TargetType)
.ret(); // return (box)<stack>;
return(Method.CreateDelegate(typeof(ConstructorInvoker)));
}
protected internal override Delegate CreateDelegate()
{
if (IsTargetTypeStruct && HasNoParam) // no-arg struct needs special initialization
{
Gen.DeclareLocal(TargetType); // TargetType tmp
Gen.Emit(OpCodes.Ldloca_S, (byte)0); // &tmp
Gen.Emit(OpCodes.Initobj, TargetType); // init_obj(&tmp)
Gen.Emit(OpCodes.Ldloc_0); // load tmp
}
else if (TargetType.IsArray)
{
Gen.Emit(OpCodes.Ldarg_0); // load args[] (method arguments)
Gen.Emit(OpCodes.Ldc_I4_0); // load 0
Gen.Emit(OpCodes.Ldelem_Ref); // load args[0] (length)
Gen.Emit(OpCodes.Unbox_Any, typeof(int)); // unbox stack
Gen.Emit(OpCodes.Newarr, TargetType.GetElementType()); // new T[args[0]]
}
else
{
ConstructorInfo ctorInfo = (ConstructorInfo)MemberInfo;
byte startUsableLocalIndex = 0;
if (HasRefParam)
{
startUsableLocalIndex = CreateLocalsForByRefParams(0, ctorInfo); // create by_ref_locals from argument array
Gen.DeclareLocal(TargetType); // TargetType tmp;
}
PushParamsOrLocalsToStack(0); // push arguments and by_ref_locals
Gen.Emit(OpCodes.Newobj, ctorInfo); // ctor (<stack>)
if (HasRefParam)
{
stloc_s(startUsableLocalIndex); // tmp = <stack>;
AssignByRefParamsToArray(0); // store by_ref_locals back to argument array
Gen.Emit(OpCodes.Ldloc, (short)startUsableLocalIndex); // tmp
}
}
if (TargetType.IsValueType)
{
Gen.Emit(OpCodes.Box, TargetType);
}
Gen.Emit(OpCodes.Ret); // return (box)<stack>;
return(Method.CreateDelegate(typeof(ConstructorInvoker)));
}
