caa564bea3
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]
27 lines
857 B
Rust
27 lines
857 B
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// macro f should not be able to inject a reference to 'n'.
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//
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// Ignored because `for` loops are not hygienic yet; they will require special
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// handling since they introduce a new pattern binding position.
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// ignore-test
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#![feature(macro_rules)]
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macro_rules! f(() => (n))
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fn main() -> (){
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for n in range(0i, 1) {
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println!("{}", f!()); //~ ERROR unresolved name `n`
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}
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}
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