63 lines
1.6 KiB
Rust
63 lines
1.6 KiB
Rust
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// 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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extern crate core;
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use core::intrinsics::discriminant_value;
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enum CLike1 {
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A,
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B,
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C,
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D
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}
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enum CLike2 {
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A = 5,
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B = 2,
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C = 19,
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D
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}
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enum ADT {
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First(u32, u32),
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Second(u64)
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}
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enum NullablePointer {
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Something(&'static u32),
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Nothing
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}
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static CONST : u32 = 0xBEEF;
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pub fn main() {
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unsafe {
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assert_eq!(discriminant_value(&CLike1::A), 0);
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assert_eq!(discriminant_value(&CLike1::B), 1);
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assert_eq!(discriminant_value(&CLike1::C), 2);
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assert_eq!(discriminant_value(&CLike1::D), 3);
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assert_eq!(discriminant_value(&CLike2::A), 5);
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assert_eq!(discriminant_value(&CLike2::B), 2);
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assert_eq!(discriminant_value(&CLike2::C), 19);
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assert_eq!(discriminant_value(&CLike2::D), 20);
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assert_eq!(discriminant_value(&ADT::First(0,0)), 0);
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assert_eq!(discriminant_value(&ADT::Second(5)), 1);
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assert_eq!(discriminant_value(&NullablePointer::Nothing), 1);
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assert_eq!(discriminant_value(&NullablePointer::Something(&CONST)), 0);
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assert_eq!(discriminant_value(&10), 0);
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assert_eq!(discriminant_value(&"test"), 0);
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}
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}
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