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author | Jason Zaugg <jzaugg@gmail.com> | 2013-12-08 22:37:38 +0100 |
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committer | Jason Zaugg <jzaugg@gmail.com> | 2013-12-10 14:23:35 +0100 |
commit | 6f42bd6881f9b1a6fa25d744cded38f53058538c (patch) | |
tree | 39b8ea92d8841e56ff0c319670ac7cb8cac760a7 /test/files/pos/t8046c.scala | |
parent | 0de991ffea7c0d461cb4435fb8385c52ee39f7e3 (diff) | |
download | scala-6f42bd6881f9b1a6fa25d744cded38f53058538c.tar.gz scala-6f42bd6881f9b1a6fa25d744cded38f53058538c.tar.bz2 scala-6f42bd6881f9b1a6fa25d744cded38f53058538c.zip |
SI-8046 Only use fast TypeRef#baseTypeSeq with concrete base types
We can only compute the base type sequence (BTS) of a `TypeRef` by
element-wise transforming the BTS of the referenced symbol if
there are no abstract types in its BTS type symbols.
In the now-working test case, `pos/t8046.scala`, the difference
between the old and new calculation of the BTS is:
this = Three.this.Alias[Int]
sym.info.baseTypeSeq = BTS(One.this.Op[A],Any)
mapped BTS = BTS(Three.this.Op[Int],Any)
full BTS = BTS(Three.this.Op[Int],Int => Int,Object,Any)
The change to account for PolyType in ArgsTypeRef#transform is now
needed to avoid the full BTS of:
BTS(Three.this.Op[A],A => A,Object,Any)
Interestingly, everything actually works without that change.
Diffstat (limited to 'test/files/pos/t8046c.scala')
-rw-r--r-- | test/files/pos/t8046c.scala | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/test/files/pos/t8046c.scala b/test/files/pos/t8046c.scala new file mode 100644 index 0000000000..f05b4c15b5 --- /dev/null +++ b/test/files/pos/t8046c.scala @@ -0,0 +1,19 @@ +trait One { + type Op[A] + type Alias[A] = Op[A] +} + +trait Three extends One { + trait Op[A] extends (A => A) + + def f1(f: Op[Int]) = f(5) + def f2(f: Alias[Int]) = f(5) + def f3[T <: Op[Int]](f: T) = f(5) + def f4[T <: Alias[Int]](f: T) = f(5) + // ./a.scala:12: error: type mismatch; + // found : Int(5) + // required: T1 + // def f4[T <: Alias[Int]](f: T) = f(5) + // ^ +} + |