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| author | Martin Odersky <odersky@gmail.com> | 2016-08-26 10:26:22 +0200 |
|---|---|---|
| committer | Martin Odersky <odersky@gmail.com> | 2016-08-26 17:57:09 +0200 |
| commit | eef9be9817f5c0516e221aab1d14d748a12b386c (patch) | |
| tree | 594a623f4eb0034e083621e58c98ff63dd5a1b40 /src/dotty/tools/dotc/core/Constraint.scala | |
| parent | 959ea0cad3a2ffe441b5e406d26cddbd6cc431ee (diff) | |
| download | dotty-eef9be9817f5c0516e221aab1d14d748a12b386c.tar.gz dotty-eef9be9817f5c0516e221aab1d14d748a12b386c.tar.bz2 dotty-eef9be9817f5c0516e221aab1d14d748a12b386c.zip | |
Implement constraint merging
Not used yet, but we might use it as an alternative to typedArg invalidation later.
Diffstat (limited to 'src/dotty/tools/dotc/core/Constraint.scala')
| -rw-r--r-- | src/dotty/tools/dotc/core/Constraint.scala | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/dotty/tools/dotc/core/Constraint.scala b/src/dotty/tools/dotc/core/Constraint.scala index 436b035dc..99b4af0a9 100644 --- a/src/dotty/tools/dotc/core/Constraint.scala +++ b/src/dotty/tools/dotc/core/Constraint.scala @@ -143,6 +143,9 @@ abstract class Constraint extends Showable { /** The uninstantiated typevars of this constraint */ def uninstVars: collection.Seq[TypeVar] + /** The weakest constraint that subsumes both this constraint and `other` */ + def & (other: Constraint)(implicit ctx: Context): Constraint + /** Check that no constrained parameter contains itself as a bound */ def checkNonCyclic()(implicit ctx: Context): Unit |