3dcd215740
This breaks code that referred to variant names in the same namespace as
their enum. Reexport the variants in the old location or alter code to
refer to the new locations:
```
pub enum Foo {
A,
B
}
fn main() {
let a = A;
}
```
=>
```
pub use self::Foo::{A, B};
pub enum Foo {
A,
B
}
fn main() {
let a = A;
}
```
or
```
pub enum Foo {
A,
B
}
fn main() {
let a = Foo::A;
}
```
[breaking-change]
70 lines
1.7 KiB
Rust
70 lines
1.7 KiB
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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#![feature(if_let)]
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pub fn main() {
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let x = Some(3i);
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if let Some(y) = x {
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assert_eq!(y, 3i);
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} else {
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panic!("if-let panicked");
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}
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let mut worked = false;
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if let Some(_) = x {
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worked = true;
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}
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assert!(worked);
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let clause: uint;
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if let None = Some("test") {
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clause = 1;
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} else if 4u > 5 {
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clause = 2;
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} else if let Ok(()) = Err::<(),&'static str>("test") {
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clause = 3;
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} else {
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clause = 4;
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}
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assert_eq!(clause, 4u);
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if 3i > 4 {
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panic!("bad math");
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} else if let 1 = 2i {
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panic!("bad pattern match");
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}
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enum Foo {
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One,
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Two(uint),
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Three(String, int)
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}
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let foo = Foo::Three("three".to_string(), 42i);
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if let Foo::One = foo {
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panic!("bad pattern match");
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} else if let Foo::Two(_x) = foo {
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panic!("bad pattern match");
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} else if let Foo::Three(s, _) = foo {
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assert_eq!(s.as_slice(), "three");
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} else {
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panic!("bad else");
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}
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if false {
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panic!("wat");
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} else if let a@Foo::Two(_) = Foo::Two(42u) {
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if let Foo::Two(b) = a {
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assert_eq!(b, 42u);
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} else {
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panic!("panic in nested if-let");
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}
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}
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}
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