rust/src/test/run-pass/lexical-scoping.rs
Jeffrey Seyfried faf0852fc1 Resolve: fix #23880, a scoping bug
This fixes a bug in which items in a block are shadowed by local variables and type parameters that are in scope.
It is a [breaking-change]. For example, the following code breaks:

```rust
fn foo() {
    let mut f = 1;
    {
        fn f() {}
        f += 1; // This will now resolve to the function instead of the local variable
    }
}
```

Any breakage can be fixed by renaming the item that is no longer shadowed.
2016-01-26 04:16:58 +00:00

29 lines
785 B
Rust

// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// Tests that items in subscopes can shadow type parameters and local variables (see issue #23880).
#![allow(unused)]
struct Foo<X> { x: Box<X> }
impl<Bar> Foo<Bar> {
fn foo(&self) {
type Bar = i32;
let _: Bar = 42;
}
}
fn main() {
let f = 1;
{
fn f() {}
f();
}
}