private static void VerifyNullableEnumLongToUShort(El? value, bool useInterpreter)
{
Expression<Func<ushort>> e =
Expression.Lambda<Func<ushort>>(
Expression.Convert(Expression.Constant(value, typeof(El?)), typeof(ushort)),
Enumerable.Empty<ParameterExpression>());
Func<ushort> f = e.Compile(useInterpreter);
if (value.HasValue)
Assert.Equal((ushort)value.GetValueOrDefault(), f());
else
Assert.Throws<InvalidOperationException>(() => f());
}
private static void VerifyCheckedNullableEnumLongToSByte(El? value, bool useInterpreter)
{
Expression<Func<sbyte>> e =
Expression.Lambda<Func<sbyte>>(
Expression.ConvertChecked(Expression.Constant(value, typeof(El?)), typeof(sbyte)),
Enumerable.Empty<ParameterExpression>());
Func<sbyte> f = e.Compile(useInterpreter);
if (value.HasValue)
{
var unboxed = value.GetValueOrDefault();
if ((long)unboxed < sbyte.MinValue | (long)unboxed > sbyte.MaxValue)
Assert.Throws<OverflowException>(() => f());
else
Assert.Equal((sbyte)unboxed, f());
}
else
Assert.Throws<InvalidOperationException>(() => f());
}
private static void VerifyCheckedNullableEnumLongToNullableULong(El? value, bool useInterpreter)
{
Expression<Func<ulong?>> e =
Expression.Lambda<Func<ulong?>>(
Expression.ConvertChecked(Expression.Constant(value, typeof(El?)), typeof(ulong?)),
Enumerable.Empty<ParameterExpression>());
Func<ulong?> f = e.Compile(useInterpreter);
if ((!value.HasValue))
Assert.Null(f());
else if (value.GetValueOrDefault() < 0)
Assert.Throws<OverflowException>(() => f());
else
Assert.Equal((ulong?)value.GetValueOrDefault(), f());
}
private static void VerifyCheckedNullableEnumLongToEnum(El? value, bool useInterpreter)
{
Expression<Func<E>> e =
Expression.Lambda<Func<E>>(
Expression.ConvertChecked(Expression.Constant(value, typeof(El?)), typeof(E)),
Enumerable.Empty<ParameterExpression>());
Func<E> f = e.Compile(useInterpreter);
if (value.HasValue)
{
if ((long)value.GetValueOrDefault() < int.MinValue || (long)value.GetValueOrDefault() > int.MaxValue)
Assert.Throws<OverflowException>(() => f());
else
Assert.Equal((E)value.GetValueOrDefault(), f());
}
else
Assert.Throws<InvalidOperationException>(() => f());
}
