47 lines
1.1 KiB
Rust
47 lines
1.1 KiB
Rust
// Copyright 2012 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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// xfail-fast
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#[no_core];
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extern mod core;
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use core::{str, int, vec};
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trait to_str {
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fn to_str() -> ~str;
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}
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impl int: to_str {
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fn to_str() -> ~str { int::str(self) }
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}
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impl<T: to_str> ~[T]: to_str {
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fn to_str() -> ~str {
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~"[" + str::connect(vec::map(self, |e| e.to_str() ), ~", ") + ~"]"
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}
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}
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fn main() {
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assert 1.to_str() == ~"1";
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assert (~[2, 3, 4]).to_str() == ~"[2, 3, 4]";
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fn indirect<T: to_str>(x: T) -> ~str {
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x.to_str() + ~"!"
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}
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assert indirect(~[10, 20]) == ~"[10, 20]!";
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fn indirect2<T: to_str>(x: T) -> ~str {
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indirect(move x)
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}
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assert indirect2(~[1]) == ~"[1]!";
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}
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