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Tweak AvoidMap's derivedSelect #16563

Merged
merged 1 commit into from
Jan 3, 2023
Merged

Tweak AvoidMap's derivedSelect #16563

merged 1 commit into from
Jan 3, 2023

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dwijnand
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@dwijnand dwijnand commented Dec 20, 2022 •
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Using the example from pos/i16435.avoid:

class Foo:
  type Value
  def test: Option[Value] =
    val scr = {
      val self: Foo.this.type = this
      None: Option[self.Value]
    }
    scr

We want avoidance to return Option[Value], aka
Option[Foo.this.Value], rather than widening to Option[Any].

Using test cases i16105,i16435,i2945,i8900,i8861 we don't tryWiden if
the derived prefix is a singleton.

And fix some kind of race condition in creating files/directories.

@dwijnand dwijnand linked an issue Dec 20, 2022 that may be closed by this pull request
Matching on Option[Option[T]] where T is abstract and obtained from inline def in super trait emits exhaustivity warning #16435
Closed
@dwijnand dwijnand changed the title Delay widening in derivedSelect when avoiding Tweak AvoidMap's derivedSelect Dec 21, 2022
@dwijnand
Tweak AvoidMap's derivedSelect
342ebf3 
Using the example from `pos/i16435.avoid`:

    class Foo:
      type Value
      def test: Option[Value] =
        val scr = {
          val self: Foo.this.type = this
          None: Option[self.Value]
        }
        scr

We want avoidance to return `Option[Value]`, aka
`Option[Foo.this.Value]`, rather than widening to `Option[Any]`.

Using test cases i16105,i16435,i2945,i8900,i8861 we don't tryWiden if
the derived prefix is a singleton.

And fix some kind of race condition in creating files/directories.
@dwijnand dwijnand marked this pull request as ready for review December 21, 2022 14:00
@smarter smarter merged commit bcf44f8 into scala:main Jan 3, 2023
@dwijnand dwijnand deleted the exh/inline branch January 3, 2023 17:16
@Kordyjan Kordyjan added this to the 3.3.0 milestone Aug 1, 2023
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@dwijnand @smarter @Kordyjan