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v0.12.2

@garyb garyb released this
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New features

  • Named type wildcards (#3500, @natefaubion)

    It's now possible to use ?hole style syntax in type signatures where you want the compiler to tell you the missing type. This was previously possible by using _ in a type signature, but now _ can be used without raising a warning, as long as it does not appear in a top level declaration.

Enhancements

Fixes

Other (internals)