indentOperator doesn't apply to union and intersection type expressions

[martingd]

Configuration

version = "3.4.3"
runner.dialect = scala3

newlines.source = keep

indentOperator.excludeRegex = "^(&|\\||&&|\\|\\|)$"
indentOperator.exemptScope = aloneArgOrBody

Problem

Given the above configuration and given this code:

val x =
  1 |
  2 |
  3 |
  4

type T =
  Byte |
  Short |
  Int |
  Long |
  Double

when I run scalafmt via CLI like this: scalafmt test.scala --stdout

The output is:

val x =
  1 |
  2 |
  3 |
  4

type T =
  Byte |
    Short |
    Int |
    Long |
    Double

Expectation

I would like the formatted output to keep its original indentation:

val x =
  1 |
  2 |
  3 |
  4

type T =
  Byte |
  Short |
  Int |
  Long |
  Double

However, it seems the indentOperator configuration only applies to value expressions and not type expressions (e.g., union types).

Workaround

None.

[kitbellew]

@martingd what if you used scala213 dialect instead? will that be formatted differently?

[martingd]

@kitbellew Does that make sense? Scala 2 does not have union types? I cannot compile this code with the Scala 2 compiler (even if I wrap it in an object).

% scalac test2.scala
test2.scala:12: error: not found: type |
  Long |

[martingd]

@kitbellew But I tried anyway:

% scalafmt test2.scala --stdout
object Test {
  val x =
    1 |
    2 |
    3 |
    4

  type T =
    Byte |
    Short |
    Int |
    Long |
    Double

But the code is still not valid Scala 2. Isn't the reason it works that scalafmt sees this as a binary or operator and not a type union?

[kitbellew]

scalafmt is not a compiler. it uses scalameta to parse the code, and for scala2 the parser produces a different tree which is handled correctly, which you confirmed for me. so, need to change the parser.

[martingd]

@kitbellew I understand it's not a compiler. :)
I think I misunderstood what it was you would obtain by trying out the scala213 dialect.