internal static void EmitLiteral(ILGenerator ilg, Constant c, TypeSymbol t = null)
{
if (t == null)
{
t = c.Type;
}
switch (t.NativeType)
{
case NativeType.Boolean:
if (c.Boolean == true)
{
ilg.Emit(OpCodes.Ldc_I4_1);
}
else
{
ilg.Emit(OpCodes.Ldc_I4_0);
}
break;
case NativeType.SByte:
case NativeType.Int16:
case NativeType.Int32:
{
int?ordinal = c.Int;
EmitConstant_I4(ilg, ordinal.Value);
}
break;
case NativeType.Byte:
case NativeType.Char:
case NativeType.UInt16:
case NativeType.UInt32:
{
uint?ordinal = c.UInt;
EmitConstant_I4(ilg, unchecked ((int)ordinal.Value));
}
break;
case NativeType.UInt64:
ilg.Emit(OpCodes.Ldc_I8, c.ULong.Value);
break;
case NativeType.Int64:
ilg.Emit(OpCodes.Ldc_I8, c.Long.Value);
break;
case NativeType.Single:
ilg.Emit(OpCodes.Ldc_R4, c.Float.Value);
break;
case NativeType.Double:
ilg.Emit(OpCodes.Ldc_R8, c.Double.Value);
break;
case NativeType.String:
ilg.Emit(OpCodes.Ldstr, c.String);
break;
case NativeType.DateTime:
EmitConstant_I4(ilg, c.DateTime.Value.Year);
EmitConstant_I4(ilg, c.DateTime.Value.Month);
EmitConstant_I4(ilg, c.DateTime.Value.Day);
ilg.Emit(OpCodes.Newobj, (Compilation.Get(WellKnownMembers.XSharp___Date_ctor) as ConstructorSymbol).Constructor);
break;
case NativeType.Decimal:
{
int[] bits = decimal.GetBits(c.Decimal.Value);
EmitConstant_I4(ilg, bits.Length);
ilg.Emit(OpCodes.Newarr, typeof(int));
for (int i = 0; i < bits.Length; i++)
{
ilg.Emit(OpCodes.Dup);
EmitConstant_I4(ilg, i);
EmitConstant_I4(ilg, bits[i]);
ilg.Emit(OpCodes.Stelem_I4);
}
ilg.Emit(OpCodes.Newobj, (Compilation.Get(WellKnownMembers.System_Decimal_ctor) as ConstructorSymbol).Constructor);
}
break;
case NativeType.Object:
ilg.Emit(OpCodes.Ldnull);
break;
case NativeType.Usual:
EmitDefault(ilg, t);
break;
default:
if (c.Type.IsEnum)
{
EmitLiteral(ilg, c, c.Type.EnumUnderlyingType);
break;
}
throw new InternalError();
}
}