82 lines
2.5 KiB
Rust
82 lines
2.5 KiB
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
|
|
// file at the top-level directory of this distribution and at
|
|
// http://rust-lang.org/COPYRIGHT.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
|
// option. This file may not be copied, modified, or distributed
|
|
// except according to those terms.
|
|
|
|
#![allow(dead_code)]
|
|
|
|
// very simple test for a 'static static with default lifetime
|
|
static STATIC_STR: &str = "&'static str";
|
|
const CONST_STR: &str = "&'static str";
|
|
|
|
// this should be the same as without default:
|
|
static EXPLICIT_STATIC_STR: &'static str = "&'static str";
|
|
const EXPLICIT_CONST_STR: &'static str = "&'static str";
|
|
|
|
// a function that elides to an unbound lifetime for both in- and output
|
|
fn id_u8_slice(arg: &[u8]) -> &[u8] {
|
|
arg
|
|
}
|
|
|
|
// one with a function, argument elided
|
|
static STATIC_SIMPLE_FN: &fn(&[u8]) -> &[u8] = &(id_u8_slice as fn(&[u8]) -> &[u8]);
|
|
const CONST_SIMPLE_FN: &fn(&[u8]) -> &[u8] = &(id_u8_slice as fn(&[u8]) -> &[u8]);
|
|
|
|
// this should be the same as without elision
|
|
static STATIC_NON_ELIDED_fN: &for<'a> fn(&'a [u8]) -> &'a [u8] =
|
|
&(id_u8_slice as for<'a> fn(&'a [u8]) -> &'a [u8]);
|
|
const CONST_NON_ELIDED_fN: &for<'a> fn(&'a [u8]) -> &'a [u8] =
|
|
&(id_u8_slice as for<'a> fn(&'a [u8]) -> &'a [u8]);
|
|
|
|
// another function that elides, each to a different unbound lifetime
|
|
fn multi_args(a: &u8, b: &u8, c: &u8) {}
|
|
|
|
static STATIC_MULTI_FN: &fn(&u8, &u8, &u8) = &(multi_args as fn(&u8, &u8, &u8));
|
|
const CONST_MULTI_FN: &fn(&u8, &u8, &u8) = &(multi_args as fn(&u8, &u8, &u8));
|
|
|
|
struct Foo<'a> {
|
|
bools: &'a [bool],
|
|
}
|
|
|
|
static STATIC_FOO: Foo = Foo { bools: &[true, false] };
|
|
const CONST_FOO: Foo = Foo { bools: &[true, false] };
|
|
|
|
type Bar<'a> = Foo<'a>;
|
|
|
|
static STATIC_BAR: Bar = Bar { bools: &[true, false] };
|
|
const CONST_BAR: Bar = Bar { bools: &[true, false] };
|
|
|
|
type Baz<'a> = fn(&'a [u8]) -> Option<u8>;
|
|
|
|
fn baz(e: &[u8]) -> Option<u8> {
|
|
e.first().map(|x| *x)
|
|
}
|
|
|
|
static STATIC_BAZ: &Baz = &(baz as Baz);
|
|
const CONST_BAZ: &Baz = &(baz as Baz);
|
|
|
|
static BYTES: &[u8] = &[1, 2, 3];
|
|
|
|
fn main() {
|
|
// make sure that the lifetime is actually elided (and not defaulted)
|
|
let x = &[1u8, 2, 3];
|
|
STATIC_SIMPLE_FN(x);
|
|
CONST_SIMPLE_FN(x);
|
|
|
|
STATIC_BAZ(BYTES); // neees static lifetime
|
|
CONST_BAZ(BYTES);
|
|
|
|
// make sure this works with different lifetimes
|
|
let a = &1;
|
|
{
|
|
let b = &2;
|
|
let c = &3;
|
|
CONST_MULTI_FN(a, b, c);
|
|
}
|
|
}
|