[C#] C#11's raw string literals (multi-line strings) are not handled

[Jackenmen]

What happened?

string longMessage = """
    This is a long message.
    It has several lines.
        Some are indented
                more than others.
    Some should start at the first column.
    Some have "quoted text" in them.
    """;

This feature was first available in C#11 Preview in April 2022 and has since been released as part of the .NET 7 update on November 2022:
https://learn.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-11#raw-string-literals

[deathaxe]

Support for raw literals was added by #3659 and was released with ST4149.

[Jackenmen]

@deathaxe Hi, I've noticed an issue on ST 4150 with how this works with an interpolation:

var location = $"""
   You are at {{{Longitude}}, {{Latitude}}}
   """;

Is this something that #3720 is supposed to track or should I make another issue for it?

[deathaxe]

That's a separate issue. #3720 is about structuring syntax definition like python, as the new raw literals seem equaly complex.

There may be more issues, as PR #3659 claims to be a start for literal support only.