Refer to a String that can be set to a flag from a variable

[crane-hiromu]

Thanks for the useful library :)

Now, I wrote @Spyable(behindPreprocessorFlag: "DEBUG") in a lot of code.
So I felt I would like to set "DEBUG" as a variable.

In this case if DEBUG is not generated.
Are there any good way?

[Matejkob]

Hi @crane-hiromu,

thanks for your feedback! 🫶

Unfortunately, the argument requires a static string literal. We wouldn't have access to the content if you provided string dynamically or used interpolation. I have created a PR #85 that adds a diagnostic error if one would provide not static string literal.