Update .NET regex engine to .NET 7.0

[danmoseley]

.NET 7 just was released. Could you please update to use it ?

https://dotnet.microsoft.com/en-us/download/dotnet/7.0

https://devblogs.microsoft.com/dotnet/regular-expression-improvements-in-dotnet-7/

[firasdib]

The website already uses .NET 7. Are there any features you feel are missing?

[danmoseley]

@firasdib nope -- just checking you had picked up the final GA bits as I worked on it and I couldn't find a version number anywhere. Sounds like you've done that already -- thanks!

Incidentally, .NET 7 adds a new engine one that doesn't support all features (eg, principally it doesn't support backtracking) but has tighter bounds on execution time. I wonder whether it might be interesting to offer that as another option in the UI? It's the exact same API, but passing RegexOptions.NonBacktracking. Offering it on regex101 would allow folks to play with patterns they intend to pass to that engine. If that might be interesting I could open an issue to track the suggestion. https://devblogs.microsoft.com/dotnet/regular-expression-improvements-in-dotnet-7/#backtracking-and-regexoptions-nonbacktracking

cc @stephentoub

[Ernest314]

@danmoseley I would be interested in support for RegexOptions.NonBacktracking as well, +1 for that!

[danmoseley]

@Ernest314 great -do you want to open that suggestion? (I have a bias 🙂)

[firasdib]

Thanks for opening up the other issue, I will look into it.