1 // Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
13 The `ToStr` trait for converting to strings
17 use option::{Some, None};
20 use vec::ImmutableVector;
22 /// A generic trait for converting a value to a string
24 /// Converts the value of `self` to an owned string
25 fn to_str(&self) -> ~str;
28 /// Trait for converting a type to a string, consuming it in the process.
30 /// Consume and convert to a string.
31 fn into_str(self) -> ~str;
36 fn to_str(&self) -> ~str { ~"()" }
39 impl<'a,A:ToStr> ToStr for &'a [A] {
41 fn to_str(&self) -> ~str {
44 for elt in self.iter() {
51 acc.push_str(elt.to_str());
58 impl<A:ToStr> ToStr for ~[A] {
60 fn to_str(&self) -> ~str {
63 for elt in self.iter() {
70 acc.push_str(elt.to_str());
82 fn test_simple_types() {
83 assert_eq!(1i.to_str(), ~"1");
84 assert_eq!((-1i).to_str(), ~"-1");
85 assert_eq!(200u.to_str(), ~"200");
86 assert_eq!(2u8.to_str(), ~"2");
87 assert_eq!(true.to_str(), ~"true");
88 assert_eq!(false.to_str(), ~"false");
89 assert_eq!(().to_str(), ~"()");
90 assert_eq!((~"hi").to_str(), ~"hi");
96 assert_eq!(x.to_str(), ~"[]");
97 assert_eq!((~[1]).to_str(), ~"[1]");
98 assert_eq!((~[1, 2, 3]).to_str(), ~"[1, 2, 3]");
99 assert!((~[~[], ~[1], ~[1, 1]]).to_str() ==
100 ~"[[], [1], [1, 1]]");