/// <summary>
/// Emits unbox or cast when necessary.
/// </summary>
/// <param name="targetType">Type of the target.</param>
public Instructions EmitUnboxOrCastIfNecessary(TypeReference targetType)
{
// for generics and some unknown reason, an unbox_any is needed
if (targetType.IsGenericParameter)
return Emit(OpCodes.Unbox_Any, targetType);
if (targetType.IsValueType)
return Emit(OpCodes.Unbox_Any, targetType);
if (!targetType.SafeEquivalent(targetType.Module.SafeImport(typeof(object))))
return Emit(OpCodes.Castclass, targetType);
return this;
}
/// <summary>
/// Determines whether the specified type reference is aspect.
/// </summary>
/// <param name="typeReference">The type reference.</param>
/// <param name="markerInterface">The aspect marker interface.</param>
/// <returns></returns>
private bool IsMarker(TypeReference typeReference, TypeDefinition markerInterface)
{
lock (_isInterface)
{
var key = Tuple.Create(typeReference.FullName, markerInterface.FullName);
// there is a cache, because the same attribute may be found several time
// and we're in a hurry, the developper is waiting for his program to start!
bool isMarker;
if (_isInterface.TryGetValue(key, out isMarker))
return isMarker;
// otherwise look for type or implemented interfaces (recursively)
var interfaces = typeReference.Resolve().Interfaces;
_isInterface[key] = isMarker = typeReference.SafeEquivalent(markerInterface)
|| interfaces.Any(i => IsMarker(i, markerInterface));
return isMarker;
}
}
/// <summary>
/// Emits a stind.
/// </summary>
/// <param name="type">The type.</param>
public Instructions EmitStind(TypeReference type)
{
if (type.IsValueType)
{
if (type.SafeEquivalent(type.Module.SafeImport(typeof(Byte))) || type.SafeEquivalent(type.Module.SafeImport(typeof(SByte))))
return Emit(OpCodes.Stind_I1);
if (type.SafeEquivalent(type.Module.SafeImport(typeof(Int16))) || type.SafeEquivalent(type.Module.SafeImport(typeof(UInt16))))
return Emit(OpCodes.Stind_I2);
if (type.SafeEquivalent(type.Module.SafeImport(typeof(Int32))) || type.SafeEquivalent(type.Module.SafeImport(typeof(UInt32))))
return Emit(OpCodes.Stind_I4);
if (type.SafeEquivalent(type.Module.SafeImport(typeof(Int64))) || type.SafeEquivalent(type.Module.SafeImport(typeof(UInt64))))
return Emit(OpCodes.Stind_I8);
if (type.SafeEquivalent(type.Module.SafeImport(typeof(Single))))
return Emit(OpCodes.Stind_R4);
if (type.SafeEquivalent(type.Module.SafeImport(typeof(Double))))
return Emit(OpCodes.Stind_R8);
return Emit(OpCodes.Stobj, type);
}
return Emit(OpCodes.Stind_Ref);
}
