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This info transformation was left untriggered before backend was enabled.
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Move some tests into proper slots + comments what they are.
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Moved some working test to pos. I wonder why they were in pending? They did work for me.
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The previous scheme did not propagate bounds correctly. More generally,
given a comparison
T { X <: A } <: U { X <: B }
it would errenously decompose this to
T <: U, A <: B
But we really need to check whether the total constraint for X in T { X <: A }
subsumes the total constraint for X in T { X <: B }
The new scheme propagates only if the binding in the lower type is an alias.
E.g.
T { X = A } <: Y { X <: B }
decomposes to
T { A = A } <: U, A <: B
The change uncovered another bug, where in the slow path we too a member relative to a refined type;
We need to "narrow" the type to a RefinedThis instead. (See use of "narrow" in TypeComparer).
That change uncovered a third bug concerning the underlying type of a RefinedThis. The last bug was fixed in a previous commit (84f32cd814f2e07725b6ad1f6bff23d4ee38c397).
Two tests (1048, 1843) which were pos tests for scalac but failed compling in dotc have
changed their status and location. They typecheck now, but fail later. They have been
moved to pending.
There's a lot of diagnostic code in TypeComparer to figure out the various problems. I left it in
to be able to come back to the commit in case there are more problems. The checks and diagnostics
will be removed in a subsequent commit.
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The dummy constructor is needed so that the real constructors see the import of the companion object.
The constructor has a parameter of type Unit so that no Java code can call it.
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Except t1048 which infers incorrect type in typer, patmat creates a tree that computes a more precise one that fails to typecheck
Disabling erasure due to dozens of "Type BLA is illegal after erasure" errors.
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Currently we cannot run this test automatically because the testing framework
does not know about .java files. It was run manually and verified that ElimRepeated
does was it is supposed to do (create a varargs bridge).
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Mostly Java interop tests which are not yet supported. The test infrastructure for Java ocmpilation and the java parser from Scala are still missing.
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Added more tests which all pass, except for tests in disabled and pending.
t0694 went from pos to neg, because the kind of alias type used in t0695 is no longer supported.
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Test t0288 moved to disabled due to lack of Java interop.
Test t0273 fixed by relaxing double def condition: We only regard two
definitions that define the same name and have exactly the same signature
as double definitions. Previously, signatures that defined the same parameters
were also excluded.
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