ec7c800d2f
This commit removes pretty-expanded from all tests that wind up calling panic! one way or another now that its internals are unstable.
31 lines
976 B
Rust
31 lines
976 B
Rust
// Copyright 2015 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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// Test that vec is now covariant in its argument type.
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#![allow(dead_code)]
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#![feature(core)]
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fn foo<'a,'b>(v1: Vec<&'a i32>, v2: Vec<&'b i32>) -> i32 {
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bar(v1, v2).cloned().unwrap_or(0) // only type checks if we can intersect 'a and 'b
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}
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fn bar<'c>(v1: Vec<&'c i32>, v2: Vec<&'c i32>) -> Option<&'c i32> {
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v1.get(0).cloned().or_else(|| v2.get(0).cloned())
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}
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fn main() {
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let x = 22;
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let y = 44;
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assert_eq!(foo(vec![&x], vec![&y]), 22);
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assert_eq!(foo(vec![&y], vec![&x]), 44);
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}
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