26 lines
750 B
Rust
26 lines
750 B
Rust
// Copyright 2014 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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// pretty-expanded FIXME #23616
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#![feature(slice_patterns)]
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fn main() {
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assert_eq!(count_members(&[1, 2, 3, 4]), 4);
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}
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fn count_members(v: &[usize]) -> usize {
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match v {
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[] => 0,
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[_] => 1,
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[_x, xs..] => 1 + count_members(xs)
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}
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}
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