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1a4d82fc | 1 | // Copyright 2014 The Rust Project Developers. See the COPYRIGHT |
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2 | // file at the top-level directory of this distribution and at |
3 | // http://rust-lang.org/COPYRIGHT. | |
4 | // | |
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. | |
10 | ||
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11 | pub fn foo(params: Option<&[&str]>) -> usize { |
12 | params.unwrap().first().unwrap().len() | |
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13 | } |
14 | ||
15 | fn main() { | |
1a4d82fc | 16 | let name = "Foo"; |
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17 | let x = Some(&[name]); |
18 | let msg = foo(x); | |
19 | //~^ ERROR mismatched types | |
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20 | //~| expected type `std::option::Option<&[&str]>` |
21 | //~| found type `std::option::Option<&[&str; 1]>` | |
22 | //~| expected slice, found array of 1 elements | |
1a4d82fc | 23 | assert_eq!(msg, 3); |
223e47cc | 24 | } |