Implement higher-ranked trait bounds. #18993
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nikomatsakis
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A monumental effort! ⛄ |
nikomatsakis
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Addressed comments in 98f1180, now rebasing. |
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Using p=1 due to the importance of this feature for 1.0 |
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Consolidate the `unboxed_closure_sugar` and `unboxed_closure` feature gates.
…_ranked` module. Also moves the docs to a more suitable place.
something other than a trait type.
`Box<for<'a> Foo<&'a T> + 'a>` can be accepted. Also cleanup the visitor/fold in general, exposing more callbacks.
use simple pattern matching to take a guess at what the method's self category is in astconv, and check it more thoroughly later.
region binding at the impl site, so for method types that come from impls, it is necessary to liberate/instantiate late-bound regions at multiple depths.
…, add new tests relating to HRTB, consolidate the `unboxed_closures` and `overloaded_calls` feature gates.
bors
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Nov 18, 2014
Enough said. Fixes #18639. r? @pcwalton (or someone else?) This is a [breaking-change]. In particular, several feature gates related to unboxed closures were consolidated into one (`overloaded_calls`, `unboxed_closure_sugar` => `unboxed_closures`). Otherwise, I think everything that worked before should still work. File a bug and cc @nikomatsakis if you find otherwise. :)
This was referenced Nov 19, 2014
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Enough said.
Fixes #18639.
r? @pcwalton (or someone else?)
This is a [breaking-change]. In particular, several feature gates related to unboxed closures were consolidated into one (
overloaded_calls,unboxed_closure_sugar=>unboxed_closures). Otherwise, I think everything that worked before should still work. File a bug and cc @nikomatsakis if you find otherwise. :)