src/test/compile-fail/issue-15783.rs

   1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
   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
  11 pub fn foo(params: Option<&[&str]>) -> usize {
  12     params.unwrap().first().unwrap().len()
  13 }
  14
  15 fn main() {
  16     let name = "Foo";
  17     let x = Some(&[name]);
  18     let msg = foo(x);
  19 //~^ ERROR mismatched types
  20 //~| expected `std::option::Option<&[&str]>`
  21 //~| found `std::option::Option<&[&str; 1]>`
  22 //~| expected slice
  23 //~| found array of 1 elements
  24     assert_eq!(msg, 3);
  25 }