public static T Convert <T>(object source)
{
T t = default(T);
if (!(source is T))
{
if (source != null)
{
if (!TypeHelper.TryNumericConversion <T>(source, out t))
{
throw Fx.Exception.AsError(new InvalidCastException(InternalSR.CannotConvertObject(source, typeof(T))));
}
else
{
return(t);
}
}
else
{
if (!typeof(T).IsValueType || TypeHelper.IsNullableType(typeof(T)))
{
T t1 = default(T);
return(t1);
}
else
{
throw Fx.Exception.AsError(new InvalidCastException(InternalSR.CannotConvertObject(source, typeof(T))));
}
}
}
else
{
return((T)source);
}
}
// handles not only the simple cast, but also value type widening, etc.
public static T Convert <T>(object source)
{
// first check the common cases
if (source is T)
{
return((T)source);
}
if (source == null)
{
if (typeof(T).IsValueType && !IsNullableType(typeof(T)))
{
throw Fx.Exception.AsError(new InvalidCastException(InternalSR.CannotConvertObject(source, typeof(T))));
}
return(default(T));
}
T result;
if (TryNumericConversion <T>(source, out result))
{
return(result);
}
throw Fx.Exception.AsError(new InvalidCastException(InternalSR.CannotConvertObject(source, typeof(T))));
}