62 lines
1.8 KiB
Rust
62 lines
1.8 KiB
Rust
// Copyright 2012-2013 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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/*!
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The `ToStr` trait for converting to strings
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*/
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use fmt;
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/// A generic trait for converting a value to a string
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pub trait ToStr {
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/// Converts the value of `self` to an owned string
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fn to_str(&self) -> ~str;
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}
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/// Trait for converting a type to a string, consuming it in the process.
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pub trait IntoStr {
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/// Consume and convert to a string.
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fn into_str(self) -> ~str;
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}
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impl<T: fmt::Show> ToStr for T {
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fn to_str(&self) -> ~str { format!("{}", *self) }
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use str::StrSlice;
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#[test]
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fn test_simple_types() {
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assert_eq!(1i.to_str(), "1".to_owned());
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assert_eq!((-1i).to_str(), "-1".to_owned());
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assert_eq!(200u.to_str(), "200".to_owned());
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assert_eq!(2u8.to_str(), "2".to_owned());
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assert_eq!(true.to_str(), "true".to_owned());
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assert_eq!(false.to_str(), "false".to_owned());
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assert_eq!(().to_str(), "()".to_owned());
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assert_eq!(("hi".to_owned()).to_str(), "hi".to_owned());
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}
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#[test]
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fn test_vectors() {
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let x: ~[int] = box [];
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assert_eq!(x.to_str(), "[]".to_owned());
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assert_eq!((box [1]).to_str(), "[1]".to_owned());
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assert_eq!((box [1, 2, 3]).to_str(), "[1, 2, 3]".to_owned());
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assert!((box [box [], box [1], box [1, 1]]).to_str() ==
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"[[], [1], [1, 1]]".to_owned());
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}
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}
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