protected virtual void _Generate(AstNodeExprImm item)
{
var itemType = AstUtils.GetSignedType(item.Type);
var itemValue = item.Value;
if (itemType.IsEnum)
{
itemType = itemType.GetEnumUnderlyingType();
itemValue = AstUtils.CastType(itemValue, itemType);
}
if (
itemType == typeof(int) ||
itemType == typeof(sbyte) ||
itemType == typeof(short) ||
itemType == typeof(bool)
)
{
var value = (int)Convert.ToInt64(itemValue);
switch (value)
{
case -1:
Emit(OpCodes.Ldc_I4_M1);
break;
case 0:
Emit(OpCodes.Ldc_I4_0);
break;
case 1:
Emit(OpCodes.Ldc_I4_1);
break;
case 2:
Emit(OpCodes.Ldc_I4_2);
break;
case 3:
Emit(OpCodes.Ldc_I4_3);
break;
case 4:
Emit(OpCodes.Ldc_I4_4);
break;
case 5:
Emit(OpCodes.Ldc_I4_5);
break;
case 6:
Emit(OpCodes.Ldc_I4_6);
break;
case 7:
Emit(OpCodes.Ldc_I4_7);
break;
case 8:
Emit(OpCodes.Ldc_I4_8);
break;
default:
Emit(OpCodes.Ldc_I4, value);
break;
}
}
else if (itemType == typeof(long) || itemType == typeof(ulong))
{
Emit(OpCodes.Ldc_I8, Convert.ToInt64(itemValue));
}
else if (itemType == typeof(IntPtr))
{
#if false
Emit(OpCodes.Ldc_I8, ((IntPtr)Item.Value).ToInt64());
Emit(OpCodes.Conv_I);
#else
if (Environment.Is64BitProcess)
{
Emit(OpCodes.Ldc_I8, ((IntPtr)item.Value).ToInt64());
Emit(OpCodes.Conv_I);
}
else
{
Emit(OpCodes.Ldc_I4, ((IntPtr)item.Value).ToInt32());
Emit(OpCodes.Conv_I);
}
#endif
}
else if (itemType == typeof(float))
{
Emit(OpCodes.Ldc_R4, (float)item.Value);
}
else if (item.Value == null)
{
Emit(OpCodes.Ldnull);
}
else if (itemType == typeof(string))
{
Emit(OpCodes.Ldstr, (string)item.Value);
}
else if (itemType == typeof(Type))
{
Emit(OpCodes.Ldtoken, (Type)item.Value);
Emit(OpCodes.Call, ((Func <RuntimeTypeHandle, Type>)Type.GetTypeFromHandle).Method);
//IL_0005: call class [mscorlib]System.Type [mscorlib]System.Type::GetTypeFromHandle(valuetype [mscorlib]System.RuntimeTypeHandle)
}
else
{
throw new NotImplementedException($"Can't handle immediate type {itemType}");
}
}
protected virtual AstNode _Optimize(AstNodeExprImm immediate)
{
return(immediate);
}
protected virtual void _Generate(AstNodeExprImm item)
{
Output.Write(ValueAsString(item.Value, item.Type));
}