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yaml --- r: 68572 b: refs/heads/auto c: 54e01eb h: refs/heads/master v: v3
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[refs]

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refs/tags/release-0.3.1: 495bae036dfe5ec6ceafd3312b4dca48741e845b
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refs/tags/release-0.5: 7e3bcfbf21278251ee936ad53e92e9b719702d73
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refs/heads/auto: 919f5a7e687052b317028d1ba26f9d3c01ed94d4
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refs/heads/auto: 54e01eb7e0ea74c01a797f56e2bf602c298a9769
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refs/heads/servo: af82457af293e2a842ba6b7759b70288da276167
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refs/tags/release-0.6: b4ebcfa1812664df5e142f0134a5faea3918544c
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// Copyright 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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// Ensures that it's legal to create a recursive stack closure as long as
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// its environment is copyable
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struct R<'self> {
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// This struct is needed to create the
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// otherwise infinite type of a fn that
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// accepts itself as argument:
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c: &'self fn:Copy(&R, uint) -> uint
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}
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fn main() {
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// Stupid version of fibonacci.
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let fib: &fn:Copy(&R, uint) -> uint = |fib, x| {
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if x == 0 || x == 1 {
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x
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} else {
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(fib.c)(fib, x-1) + (fib.c)(fib, x-2)
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}
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};
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assert!(fib(&R { c: fib }, 7) == 13);
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}

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