01740acd5a
Allows an enum with a discriminant to use any of the primitive integer types to store it. By default the smallest usable type is chosen, but this can be overridden with an attribute: `#[repr(int)]` etc., or `#[repr(C)]` to match the target's C ABI for the equivalent C enum. This commit breaks a few things, due to transmutes that now no longer match in size, or u8 enums being passed to C that expects int, or reflection; later commits on this branch fix them.
33 lines
977 B
Rust
33 lines
977 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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/*!
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* Tests the range assertion wraparound case in trans::middle::adt::load_discr.
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*/
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#[repr(u8)]
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enum Eu { Lu = 0, Hu = 255 }
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static CLu: Eu = Lu;
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static CHu: Eu = Hu;
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#[repr(i8)]
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enum Es { Ls = -128, Hs = 127 }
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static CLs: Es = Ls;
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static CHs: Es = Hs;
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pub fn main() {
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assert_eq!((Hu as u8) + 1, Lu as u8);
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assert_eq!((Hs as i8) + 1, Ls as i8);
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assert_eq!(CLu as u8, Lu as u8);
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assert_eq!(CHu as u8, Hu as u8);
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assert_eq!(CLs as i8, Ls as i8);
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assert_eq!(CHs as i8, Hs as i8);
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}
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