sourcecode port to dotty

[alexarchambault]

PR: com-lihaoyi/sourcecode#60

[alexarchambault]

It mostly works, but for a few issues…

• scala.util.Properties.versionNumberString still like "2.12.…"
  • convenient and portable way to know (at runtime) that we're running in dotty?
• needed to adjust a few Symbol.name to match decodedName from 2.x, for singletons in particular (maybe not that big a problem, this kind of things isn't uncommon even in 2.x version bumps)
  • stripped extra $ suffixes or _$ prefixes
    • https://github.com/lihaoyi/sourcecode/pull/60/files#diff-36af375568f72c76cd17b84810577edfR71
    • https://github.com/lihaoyi/sourcecode/pull/60/files#diff-36af375568f72c76cd17b84810577edfR96
    • https://github.com/lihaoyi/sourcecode/pull/60/files#diff-36af375568f72c76cd17b84810577edfR115
    • https://github.com/lihaoyi/sourcecode/pull/60/files#diff-36af375568f72c76cd17b84810577edfR125
• had to use extractors as a substitute for a few is* methods on Symbol (e.g. isPackage, isClass, isMethod, isTerm, …)
• convenient way to go from List[Expr[T]] to Expr[List[T]]? (one can always manually fold, but it may be nice to have that along Expr itself)
• !!! some lazy values, expected to be evaluated… were not!
  • https://github.com/lihaoyi/sourcecode/pull/60/files#diff-c92dac38359489a589e42c3e0cf2cff0R45
  • https://github.com/lihaoyi/sourcecode/pull/60/files#diff-b2bb7ff43a342b4959c342b026eebc99R45
• macro to get the arguments of ~the root context (like in def foo(a: Int, b: String)(implicit foo: Foo) with the implicit materialization of Foo backed by a macro - how can the macro get Exprs for 2 and "a" in f(2, "a")?). Prevents to have sourcecode.Args work fine.
• macro to get the ~raw code of arguments of the root context (in def foo(s: Seq[Int])(implicit foo: Foo), with the implicit materialization of Foo backed by a macro - how can the macro get a String "(1 to 10).sum" in f((1 to 10).sum)?). Prevents to have sourcecode.Text work fine.

[smarter]

!!! some lazy values, expected to be evaluated… were not!

@allanrenucci could you take a look at this? ^

[allanrenucci]

!!! some lazy values, expected to be evaluated… were not!

Looks like #5350

[nicolasstucki]

@alexarchambault could you add the link of the implementation and close this issue

[alexarchambault]

@nicolasstucki It's here, but still misses a few features, the last two points above:

• macro to get the arguments of ~the root context (like in def foo(a: Int, b: String)(implicit foo: Foo) with the implicit materialization of Foo backed by a macro - how can the macro get Exprs for 2 and "a" in f(2, "a")?). Prevents to have sourcecode.Args work fine.
• macro to get the ~raw code of arguments of the root context (in def foo(s: Seq[Int])(implicit foo: Foo), with the implicit materialization of Foo backed by a macro - how can the macro get a String "(1 to 10).sum" in f((1 to 10).sum)?). Prevents to have sourcecode.Text work fine.

[alexarchambault]

Or do you prefer to close the issue in spite of them?

[nicolasstucki]

Maybe open a specific issue for it.

[alexarchambault]

Done here: #5782.