WriteCodeFragment should support IsLiteral suffix for parity with MSBuild

[Youssef1313]

See dotnet/msbuild#9724 for the original bug report.

MSBuild PR that implemented the feature for C#/VB in the past: dotnet/msbuild#6285

See https://learn.microsoft.com/en-us/visualstudio/msbuild/writecodefragment-task for documentation for IsLiteral. (NOTE: The doc page says it's not supported by F# and will need to be updated when/if this is implemented)

cc @Evangelink

[T-Gro]

Hi @Youssef1313 , could you please provide a code snippet which would show where this is useful (= and where this is being a paint point as of today) ?

Do I understand it correct that this is to overcome attributes which are not covering their inputs via constructor arguments, and only provide setter properties?

[Youssef1313]

Hi @T-Gro

Code snippet:

<AssemblyAttribute Include="Microsoft.VisualStudio.TestTools.UnitTesting.Parallelize">
  <_Parameter1>Workers = 0</_Parameter1>
  <_Parameter1_IsLiteral>true</_Parameter1_IsLiteral>
  <_Parameter2>Scope = Microsoft.VisualStudio.TestTools.UnitTesting.ExecutionScope.MethodLevel</_Parameter2>
  <_Parameter2_IsLiteral>true</_Parameter2_IsLiteral>
</AssemblyAttribute>

That works fine today with C#/VB, but no with F#.

And yes, this is for named attribute arguments (i.e, property setters).