25 lines
825 B
Rust
25 lines
825 B
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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// run-pass
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pub fn main() {
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// Make sure we properly handle repeated self-appends.
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let mut a: String = "A".to_string();
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let mut i = 20;
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let mut expected_len = 1;
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while i > 0 {
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println!("{}", a.len());
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assert_eq!(a.len(), expected_len);
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a = format!("{}{}", a, a);
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i -= 1;
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expected_len *= 2;
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}
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}
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