Improve bounds in Iterator API #24217
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| @@ -207,8 +207,10 @@ pub trait Iterator { | |||
| /// both produce the same output. | |||
| #[inline] | |||
| #[stable(feature = "rust1", since = "1.0.0")] | |||
| fn zip<U: Iterator>(self, other: U) -> Zip<Self, U> where Self: Sized { | |||
| Zip{a: self, b: other} | |||
| fn zip<U: Iterator>(self, other: U) -> Zip<Self, U::IntoIter> where | |||
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is the Iterator bound on U still necessary?
|
Looks good at first glance |
Manishearth
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This commit changes `Iterator`'s API by: * Generalizing bounds from `Iterator` to `IntoIterator` whenever possible, matching the semantics and ergonomics of `for` loops. * Tightens up a few method-level bounds so that you get an error earlier. For example, `rev` did not require `DoubleEndedIterator` even though the result is only an `Iterator` when the original iterator was double-ended. Closes rust-lang#23587 The bound-tightening is technically a: [breaking-change] but no code should break in practice. r? @alexcrichton cc @Kimundi
This commit changes `Iterator`'s API by: * Generalizing bounds from `Iterator` to `IntoIterator` whenever possible, matching the semantics and ergonomics of `for` loops. * Tightens up a few method-level bounds so that you get an error earlier. For example, `rev` did not require `DoubleEndedIterator` even though the result is only an `Iterator` when the original iterator was double-ended. Closes rust-lang#23587 The bound-tightening is technically a: [breaking-change] but no code should break in practice.
Manishearth
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to Manishearth/rust
that referenced
this pull request
Apr 9, 2015
Manishearth
added a commit
to Manishearth/rust
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this pull request
Apr 9, 2015
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This commit changes
Iterator's API by:IteratortoIntoIteratorwheneverpossible, matching the semantics and ergonomics of
forloops.earlier. For example,
revdid not requireDoubleEndedIteratoreventhough the result is only an
Iteratorwhen the original iterator wasdouble-ended.
Closes #23587
The bound-tightening is technically a:
[breaking-change]
but no code should break in practice.
r? @alexcrichton
cc @Kimundi