Generic math

[Arasfon]

Works only with .NET 7 TFM.
Why: All frameworks older than .NET 7 do not support generic math in any way as far as I know as I said in #11.

Replaced sizeof(int) with sizeof(long) in stackalloc bounds calculation, because it is impossible to calculate sizeof(T) without unsafe. However if unsafe is not a bad thing to add, sizeof(T) can be added.

[aradalvand]

Thank you, @Arasfon

Removed all target frameworks except .NET 7. Why: All frameworks older than .NET 7 do not support generic math in any way as far as I know as I said in #11.

It's better to preserve support for older frameworks while having them only support int rather than drop support for them completely, and then use generic math specifically in .NET 7 onwards. I think you can use preprocessor directives like #if NET7_0 to achieve that. But removing support for older frameworks entirely isn't acceptable.

[aradalvand]

See the docs.
You need to do something like this — e.g.:

#if NET7_0_OR_GREATER
public T[] Decode(string id) => Decode(id.AsSpan());
#else
public int[] Decode(string id) => Decode(id.AsSpan());
#endif

[Arasfon]

@aradalvand, Check latest commit, everything is under preprocessor directives now.

[aradalvand]

@Arasfon Great, thanks!
Could you also add some tests for encoding/decoding numbers of types other than int? Like long, byte, ulong, etc.

[Arasfon]

@aradalvand I have added tests for both single and multiple numbers. Check them out

[celluj34]

I wonder if source generators would be a better way to accomplish this? Then we could output only int version for .Net 6 and below, and all number versions for .Net 7 and above, and we could re-use all of the code.

[aradalvand]

I wonder if source generators would be a better way to accomplish this? Then we could output only int version for .Net 6 and below, and all number versions for .Net 7 and above, and we could re-use all of the code.

This isn't really the type of scenario you would use source generators for. That would introduce far too much complexity for something that simple preprocessor directives are currently accomplishing. And we already are reusing most of the code; so that's not a concern.

[aradalvand]

Thank you @Arasfon for the contribution! And thanks @celluj34 for your participation!

I'll need to take care of this and then I'll release 2.0