public void Emit(ILGenerator gen)
{
right.Emit(gen);
if (fromType == target)
{
return;
}
if (fromType.IsByRef)
{
fromType = fromType.GetElementType();
}
if (target.IsByRef)
{
target = target.GetElementType();
}
if (target.IsValueType)
{
if (fromType.IsValueType)
{
throw new NotImplementedException("Cannot convert between distinct value types");
}
else
{
// Unbox conversion
// Assumes fromType is a boxed value
// if we can, we emit a box and ldind, otherwise, we will use unbox.any
if (LdindOpCodesDictionary.Instance[target] != LdindOpCodesDictionary.EmptyOpCode)
{
gen.Emit(OpCodes.Unbox, target);
OpCodeUtil.EmitLoadIndirectOpCodeForType(gen, target);
}
else
{
gen.Emit(OpCodes.Unbox_Any, target);
}
}
}
else
{
if (fromType.IsValueType)
{
// Box conversion
gen.Emit(OpCodes.Box, fromType);
EmitCastIfNeeded(typeof(object), target, gen);
}
else
{
// Possible down-cast
EmitCastIfNeeded(fromType, target, gen);
}
}
}
public override void Emit(IEasyMember member, ILGenerator gen)
{
_right.Emit(member, gen);
if (_fromType == _target)
{
return;
}
if (_fromType.IsByRef)
{
throw new NotSupportedException("Cannot convert from ByRef types");
}
if (_target.IsByRef)
{
throw new NotSupportedException("Cannot convert to ByRef types");
}
if (_target.IsValueType)
{
if (_fromType.IsValueType)
{
throw new NotImplementedException("Cannot convert between distinct value types at the moment");
}
else
{
// Unbox conversion
// Assumes fromType is a boxed value
gen.Emit(OpCodes.Unbox, _target);
OpCodeUtil.EmitLoadIndirectOpCodeForType(gen, _target);
}
}
else
{
if (_fromType.IsValueType)
{
// Box conversion
gen.Emit(OpCodes.Box, _fromType);
EmitCastIfNeeded(typeof(object), _target, gen);
}
else
{
// Possible down-cast
EmitCastIfNeeded(_fromType, _target, gen);
}
}
}
// TODO: Better name
public override void LoadReference(ILGenerator gen)
{
OpCodeUtil.EmitLoadIndirectOpCodeForType(gen, Type);
}