Tabular Alignment

[treetime]

Configuration (required)

#.scalafmt.conf
version = 3.7.12
runner.dialect = scala213

align.tokens = [{
  code = ")"
  owners = [{
    regex = "Defn\\.Def"
  }]
}]

Command-line parameters (required)

I did not attempt this using the CLI (since this is probably not a bug)

Steps

I want to end up with code like this:

object Test {

  def meeethod1(pram1      : AnyRef): Any = ???
  def methd2   (paaaaaram2 : Any   ): Any = ???
  def methh3   (param333333: Any   ): Any = ???
  def md4      (param4     : Any   ): Any = ???

}

Expectation

Something, anything would align in any way.

Notes

I don't think this is an issue with scalafmt per se, but I don't know whether parentheses are a valid alignment token. I am not well versed in scalafmt, but as far as I can tell, if I set a value for align.token, the regex section should enclose the area I want to align over, and these will be aligned over matching parents. For a colon I can make sense of it, Term.Param owns the colon, and the token there-after is aligned for every parent (Defn.Def).

align.tokens = [{
  code = ":"
  owners = [{
    regex = "Term\\.Param"
    parents = [ "Defn\\.Def" ]
  }]
}]

===>

object Test {

  def meeethod1(pram1:    AnyRef): Any = ???
  def methd2(paaaaaram2:  Any): Any = ???
  def methh3(param333333: Any): Any = ???
  def md4(param4:         Any): Any = ???

}

Thus, all the values to the right of the colon are aligned. No matter what I do, however, I cannot coax it into aligning over parentheses per the desired example. I've played with the AST explorer and tried a great many combinations of tokens to try achieve something, set values are wide and specific as I can - even inspected the source code a little (to no avail).

My best guess is that I would have to be able to set the alignment token to be a member of the AST itself to achieve what I'm trying to achieve, which does not seem to be a supported behaviour.

[kitbellew]

align.tokens = [{
  code = ")"
  owners = [{
    regex = "Defn\\.Def"
  }]
}]

Quick comment: in

def methd2   (paaaaaram2 : Any   ): Any = ???

both ( and ) would need to be aligned on (although that's currently broken), and they are both owned by Term.ParamClause and not Defn.Def (perhaps you used an old scalameta version in AST explorer).

[treetime]

Yes, I have been using the AST explorer (linked off the docs); the scalafiddle link never loads for me. I have only superficial knowledge of the names of the parts of the AST, so have been referencing that. For the record, the parser is [scalameta-4.4.17], and there is no explicit reference of a ParamClause.

[kitbellew]

I guess both are broken, fully or partially :( oh well.

[treetime]

Ah, unluck :/
In reference to this and the linked issue 3615; in the test, one of the results is:

object a {
  def meeethod1( pram1:       AnyRef ): Any = ???
  def methd2(    paaaaaram2:  Any    ): Any = ???
  def meth3(     param333333: Any    ): Any = ???
  def md4(       param4:      Any    ): Any = ???
}

(which is great btw, thanks). The parameter names are aligned, but is it in any way possible to also align the physical parentheses themselves? I have it as "The thing after the alignment token" is the thing being aligned, am I correct in understanding the "alignment token" in my example should effectively be Term.Name?

[kitbellew]

Ah, unluck :/ In reference to this and the linked issue 3615; in the test, one of the results is:

#3615 is a bugfix uncovered by your case, but not a fix for your example. that would be a separate story, likely needing a
a new configuration parameter since it changes behaviour (currently, md4 and ( cannot be pulled apart if they had no space between them to begin with).

[treetime]

Noted, but nevertheless, thank you, it takes me one step closer :)