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]
58 lines
1.7 KiB
Rust
58 lines
1.7 KiB
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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#![feature(macro_rules)]
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extern crate debug;
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macro_rules! check {
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($m:ident, $t:ty, $v:expr) => {{
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mod $m {
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use std::mem::size_of;
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enum E {
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V = $v,
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A = 0
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}
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static C: E = V;
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pub fn check() {
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assert_eq!(size_of::<E>(), size_of::<$t>());
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assert_eq!(V as $t, $v);
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assert_eq!(C as $t, $v);
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assert_eq!(format!("{:?}", V), "V".to_string());
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assert_eq!(format!("{:?}", C), "V".to_string());
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}
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}
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$m::check();
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}}
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}
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pub fn main() {
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check!(a, u8, 0x17);
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check!(b, u8, 0xe8);
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check!(c, u16, 0x1727);
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check!(d, u16, 0xe8d8);
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check!(e, u32, 0x17273747);
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check!(f, u32, 0xe8d8c8b8);
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check!(g, u64, 0x1727374757677787u64);
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check!(h, u64, 0xe8d8c8b8a8988878u64);
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check!(z, i8, 0x17);
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check!(y, i8, -0x17);
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check!(x, i16, 0x1727);
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check!(w, i16, -0x1727);
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check!(v, i32, 0x17273747);
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check!(u, i32, -0x17273747);
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check!(t, i64, 0x1727374757677787);
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check!(s, i64, -0x1727374757677787);
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enum Simple { A, B }
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assert_eq!(::std::mem::size_of::<Simple>(), 1);
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}
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