9e3d0b002a
This breaks a fair amount of code. The typical patterns are: * `for _ in range(0, 10)`: change to `for _ in range(0u, 10)`; * `println!("{}", 3)`: change to `println!("{}", 3i)`; * `[1, 2, 3].len()`: change to `[1i, 2, 3].len()`. RFC #30. Closes #6023. [breaking-change]
72 lines
1.8 KiB
Rust
72 lines
1.8 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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use std::rc::Rc;
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struct DerefWrapper<X, Y> {
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x: X,
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y: Y
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}
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impl<X, Y> DerefWrapper<X, Y> {
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fn get_x(self) -> X {
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self.x
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}
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}
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impl<X, Y> Deref<Y> for DerefWrapper<X, Y> {
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fn deref<'a>(&'a self) -> &'a Y {
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&self.y
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}
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}
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mod priv_test {
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pub struct DerefWrapperHideX<X, Y> {
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x: X,
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pub y: Y
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}
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impl<X, Y> DerefWrapperHideX<X, Y> {
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pub fn new(x: X, y: Y) -> DerefWrapperHideX<X, Y> {
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DerefWrapperHideX {
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x: x,
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y: y
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}
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}
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}
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impl<X, Y> Deref<Y> for DerefWrapperHideX<X, Y> {
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fn deref<'a>(&'a self) -> &'a Y {
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&self.y
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}
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}
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}
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pub fn main() {
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let nested = DerefWrapper {x: true, y: DerefWrapper {x: 0i, y: 1i}};
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// Use the first field that you can find.
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assert_eq!(nested.x, true);
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assert_eq!((*nested).x, 0);
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// Same for methods, even though there are multiple
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// candidates (at different nesting levels).
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assert_eq!(nested.get_x(), true);
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assert_eq!((*nested).get_x(), 0);
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// Also go through multiple levels of indirection.
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assert_eq!(Rc::new(nested).x, true);
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let nested_priv = priv_test::DerefWrapperHideX::new(true, DerefWrapper {x: 0i, y: 1i});
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// FIXME(eddyb) #12808 should skip private fields.
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// assert_eq!(nested_priv.x, 0);
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assert_eq!((*nested_priv).x, 0);
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}
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