270f0eef73
This is the kind of change that one is expected to need to make to accommodate overloaded-`box`. ---- Note that this is not *all* of the changes necessary to accommodate Issue 22181. It is merely the subset of those cases where there was already a let-binding in place that made it easy to add the necesasry type ascription. (For unnamed intermediate `Box` values, one must go down a different route; `Box::new` is the option that maximizes portability, but has potential inefficiency depending on whether the call is inlined.) ---- There is one place worth note, `run-pass/coerce-match.rs`, where I used an ugly form of `Box<_>` type ascription where I would have preferred to use `Box::new` to accommodate overloaded-`box`. I deliberately did not use `Box::new` here, because that is already done in coerce-match-calls.rs. ---- Precursor for overloaded-`box` and placement-`in`; see Issue 22181.
38 lines
1 KiB
Rust
38 lines
1 KiB
Rust
// Copyright 2014 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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// exec-env:RUST_POISON_ON_FREE=1
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// Test argument patterns where we create refs to the inside of
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// boxes. Make sure that we don't free the box as we match the
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// pattern.
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#![allow(unknown_features)]
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#![feature(box_patterns)]
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#![feature(box_syntax)]
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fn getaddr(box ref x: Box<uint>) -> *const uint {
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let addr: *const uint = &*x;
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addr
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}
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fn checkval(box ref x: Box<uint>) -> uint {
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*x
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}
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pub fn main() {
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let obj: Box<_> = box 1;
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let objptr: *const uint = &*obj;
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let xptr = getaddr(obj);
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assert_eq!(objptr, xptr);
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let obj = box 22;
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assert_eq!(checkval(obj), 22);
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}
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