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This commit removes resetAllAttrs from the public reflection API.
This method was previously deprecated, but on a second thought that
doesn't do it justice. People should be aware that resetAllAttrs is just
wrong, and if they have code that uses it, this code should be rewritten
immediately without beating around the bush with deprecations. There's
a source-compatible way of achieving that (resetLocalAttrs), so that
shouldn't bring much trouble.
Secondly, resetAllAttrs in compiler internals becomes deprecated. In subsequent
commits I'm going to rewrite the only two locations in the compiler that
uses it, and then I think we can remove it from the compiler as well.
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This method has always been slightly bothering me, so I was really glad
when Denys asked me to rename it. Let’s see how it pans out.
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- `New(tpe)` doesn't survive a `resetAttrs` / typecheck; use
a name instead.
- Abandon the tree attachment that passed the default
case from `typer` to `patmat`; this tree eluded the
attribute reset performed in the macro. Instead, add it
to the match. Apart from making the tree re-typable, it
also exposes the true code structure to macros, which
is important if they need to perform other code
transformations.
- Install original trees on the declared types of the
parameters of the `applyOrElse` method to ensure that
references to them within the method pick up the correct
type parameter skolems upon retypechecking.
- Propagate `TypeTree#original` through `copyAttrs`,
which is called during tree duplication / `TreeCopiers`.
Without this, the original trees that we installed were
not visible anymore during `ResetAttrs`.
We are not able to reify partial functions yet -- the
particular sticking point is reification of the parentage
which is only available in the `ClassInfoType`.
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