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author | Adriaan Moors <adriaan.moors@typesafe.com> | 2014-02-06 17:59:14 -0800 |
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committer | Adriaan Moors <adriaan.moors@typesafe.com> | 2014-02-12 10:25:12 -0800 |
commit | 7ea7a3b89b2a597f7aa22eefe39e3bae7244882f (patch) | |
tree | 3f56600fac2ca94000969f383b45d1e4d88e9b52 /test/files/pos/t8177.scala | |
parent | 668966be53da2b9b8602098625180192438345b1 (diff) | |
download | scala-7ea7a3b89b2a597f7aa22eefe39e3bae7244882f.tar.gz scala-7ea7a3b89b2a597f7aa22eefe39e3bae7244882f.tar.bz2 scala-7ea7a3b89b2a597f7aa22eefe39e3bae7244882f.zip |
SI-8177 co-evolve more than just RefinedTypes
`asSeenFrom` produced a typeref of the shape `T'#A` where `A` referred to a symbol
defined in a `T` of times past.
More precisely, the `TypeRef` case of `TypeMap`'s `mapOver` correctly modified a prefix
from having an underlying type of `{ type A = AIn }` to `{ type A = Int }`,
with a new symbol for `A` (now with info `Int`), but the symbol in the outer
`TypeRef` wasn't co-evolved (so it still referred to the `A` in `{ type A = AIn }`
underlying the old prefix).
`coEvolveSym` used to only look at prefixes that were directly `RefinedType`s,
but this bug shows they could also be `SingleType`s with an underlying `RefinedType`.
Diffstat (limited to 'test/files/pos/t8177.scala')
-rw-r--r-- | test/files/pos/t8177.scala | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/test/files/pos/t8177.scala b/test/files/pos/t8177.scala new file mode 100644 index 0000000000..9bdf80b1bb --- /dev/null +++ b/test/files/pos/t8177.scala @@ -0,0 +1,11 @@ +trait Thing { type A } +object IntThing extends Thing { type A = Int } + +// The following erroneously failed with error: method f overrides nothing. +// because asSeenFrom produced a typeref of the shape T'#A where A referred to a symbol defined in a T of times past +// More precisely, the TypeRef case of TypeMap's mapOver correctly modified prefix +// from having an underlying type of { type A = Ain } to { type A = Int }, with a new symbol for A (now with info Int), +// but the symbol in the outer type ref wasn't co-evolved (so it still referred to the { type A = AIn } underlying the old prefix) +// coEvolveSym used to only look at prefixes that were directly RefinedTypes, but they could also be SingleTypes with an underlying RefinedType +class View[AIn](val in: Thing { type A = AIn }) { def f(p: in.A): in.A = p } +class SubView extends View[Int](IntThing) { override def f(p: in.A): in.A = p } |