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]
45 lines
1.2 KiB
Rust
45 lines
1.2 KiB
Rust
// Copyright 2012-2014 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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trait to_str {
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fn to_string(&self) -> String;
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}
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impl to_str for int {
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fn to_string(&self) -> String { self.to_str() }
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}
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impl<T:to_str> to_str for Vec<T> {
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fn to_string(&self) -> String {
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format!("[{}]",
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self.iter()
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.map(|e| e.to_string())
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.collect::<Vec<String>>()
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.connect(", "))
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}
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}
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pub fn main() {
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assert!(1.to_string() == "1".to_string());
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assert!((vec!(2i, 3, 4)).to_string() == "[2, 3, 4]".to_string());
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fn indirect<T:to_str>(x: T) -> String {
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format!("{}!", x.to_string())
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}
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assert!(indirect(vec!(10i, 20)) == "[10, 20]!".to_string());
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fn indirect2<T:to_str>(x: T) -> String {
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indirect(x)
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}
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assert!(indirect2(vec!(1i)) == "[1]!".to_string());
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}
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