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move NamedTuple methods to separate scope. re-export #20504

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merged 3 commits into from
Jun 14, 2024

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By moving the methods to NamedTupleDecomposition, there is no issue with trying to reconcile types at inlining

fixes #20427

@bishabosha bishabosha force-pushed the named-tuples-methods branch from d2e000c to de96d27 Compare May 31, 2024 13:06
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This looks like it'll make named tuples more robust.

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smarter commented Jun 12, 2024

I'd love to see this merged since I ran into this in practice.

@smarter smarter merged commit 0e63753 into scala:main Jun 14, 2024
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@smarter smarter deleted the named-tuples-methods branch June 14, 2024 12:46
@Kordyjan Kordyjan added this to the 3.5.1 milestone Jul 3, 2024
EugeneFlesselle added a commit to dotty-staging/dotty that referenced this pull request Jul 9, 2024
EugeneFlesselle added a commit that referenced this pull request Jul 9, 2024
EugeneFlesselle added a commit to dotty-staging/dotty that referenced this pull request Jul 29, 2024
avoid problems encountered after inlining from scopes defining opaque types;
as was already done for the other NamedTuple operations in scala#20504.
EugeneFlesselle added a commit to dotty-staging/dotty that referenced this pull request Jul 31, 2024
This is in particular necessary for scala#21291,
to avoid problems encountered after inlining from scopes defining opaque types
(such as in the example below),
as was already done for the other NamedTuple operations in scala#20504.

```scala
-- Error: tests/pos/named-tuple-combinators.scala:46:17 ------------------------
46 |    val res1 = x.head
   |               ^^^^^^
   |(Int, String) does not conform to bound >:
   |  (x$proxy55 : (x : Test.NT) &
   |    $proxy19.NamedTuple[
   |      Tuple.Concat[
   |        NamedTupleDecomposition.Names[
   |          $proxy19.NamedTuple[Tuple1[("hi" : String)], Tuple1[Int]]],
   |        NamedTupleDecomposition.Names[
   |          $proxy19.NamedTuple[Tuple1[("bla" : String)], Tuple1[String]]]
   |      ],
   |      Tuple.Concat[
   |        NamedTupleDecomposition.DropNames[
   |          $proxy19.NamedTuple[Tuple1[("hi" : String)], Tuple1[Int]]],
   |        NamedTupleDecomposition.DropNames[
   |          $proxy19.NamedTuple[Tuple1[("bla" : String)], Tuple1[String]]]
   |      ]
   |    ]
   |  )
   | <: Tuple
   |----------------------------------------------------------------------------
   |Inline stack trace
   |- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
   |This location contains code that was inlined from NamedTuple.scala:47
47 |    inline def head: Tuple.Elem[V, 0] = x.apply(0)
   |                                        ^^^^^^^
    ----------------------------------------------------------------------------
```
bishabosha added a commit that referenced this pull request Jul 31, 2024
This is in particular necessary for #21291,
to avoid problems encountered after inlining from scopes defining opaque
types (such as in the example below),
as was already done for the other NamedTuple operations in #20504.
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NamedTuple selection on the result of NamedTuple.Concat doesn't work
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