From: bors <bors@rust-lang.org>
Date: Fri, 25 Jul 2014 02:21:14 +0000 (+0000)
Subject: auto merge of #15809 : pcwalton/rust/dedesugar-for, r=pnkfelix
X-Git-Url: https://git.lizzy.rs/?a=commitdiff_plain;h=b9035c26e2c4368b39c8daa979f669d10d484825;p=rust.git

auto merge of #15809 : pcwalton/rust/dedesugar-for, r=pnkfelix

librustc: Stop desugaring `for` expressions and translate them directly.

This makes edge cases in which the `Iterator` trait was not in scope
and/or `Option` or its variants were not in scope work properly.

This breaks code that looks like:

    struct MyStruct { ... }

    impl MyStruct {
        fn next(&mut self) -> Option<int> { ... }
    }

    for x in MyStruct { ... } { ... }

Change ad-hoc `next` methods like the above to implementations of the
`Iterator` trait. For example:

    impl Iterator<int> for MyStruct {
        fn next(&mut self) -> Option<int> { ... }
    }

Closes #15392.

[breaking-change]
---

b9035c26e2c4368b39c8daa979f669d10d484825