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// Copyright 2015 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.
// test that ordinary fat pointer operations work.
struct Wrapper<T: ?Sized>(u32, T);
struct FatPtrContainer<'a> {
ptr: &'a [u8]
}
fn fat_ptr_project(a: &Wrapper<[u8]>) -> &[u8] {
&a.1
}
fn fat_ptr_simple(a: &[u8]) -> &[u8] {
a
}
fn fat_ptr_via_local(a: &[u8]) -> &[u8] {
let x = a;
x
}
fn fat_ptr_from_struct(s: FatPtrContainer) -> &[u8] {
s.ptr
}
fn fat_ptr_to_struct(a: &[u8]) -> FatPtrContainer {
FatPtrContainer { ptr: a }
}
fn fat_ptr_store_to<'a>(a: &'a [u8], b: &mut &'a [u8]) {
*b = a;
}
fn fat_ptr_constant() -> &'static str {
"HELLO"
}
fn main() {
let a = Wrapper(4, [7,6,5]);
let p = fat_ptr_project(&a);
let p = fat_ptr_simple(p);
let p = fat_ptr_via_local(p);
let p = fat_ptr_from_struct(fat_ptr_to_struct(p));
let mut target : &[u8] = &[42];
fat_ptr_store_to(p, &mut target);
assert_eq!(target, &a.1);
assert_eq!(fat_ptr_constant(), "HELLO");
}
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