b53454e2e4
This commit moves reflection (as well as the {:?} format modifier) to a new
libdebug crate, all of which is marked experimental.
This is a breaking change because it now requires the debug crate to be
explicitly linked if the :? format qualifier is used. This means that any code
using this feature will have to add `extern crate debug;` to the top of the
crate. Any code relying on reflection will also need to do this.
Closes #12019
[breaking-change]
40 lines
1004 B
Rust
40 lines
1004 B
Rust
// Copyright 2013 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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// This assumes the packed and non-packed structs are different sizes.
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// the error points to the start of the file, not the line with the
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// transmute
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// error-pattern: transmute called on types with different size
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extern crate debug;
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use std::mem;
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#[packed]
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struct Foo<T,S> {
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bar: T,
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baz: S
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}
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struct Oof<T, S> {
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rab: T,
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zab: S
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}
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fn main() {
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let foo = Foo { bar: [1u8, 2, 3, 4, 5], baz: 10i32 };
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unsafe {
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let oof: Oof<[u8, .. 5], i32> = mem::transmute(foo);
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println!("{:?}", oof);
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}
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}
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