File: issue-70453-generics-in-discr-ice.rs

package info (click to toggle)
rustc 1.86.0%2Bdfsg1-1~bpo13%2B2
  • links: PTS, VCS
  • area: main
  • in suites:
  • size: 913,608 kB
  • sloc: xml: 158,127; python: 35,921; javascript: 19,689; sh: 19,600; cpp: 18,906; ansic: 13,124; asm: 4,376; makefile: 708; perl: 29; lisp: 29; ruby: 19; sql: 11
file content (17 lines) | stat: -rw-r--r-- 450 bytes parent folder | download | duplicates (15) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
 
#![feature(core_intrinsics)]

extern crate core;
use core::intrinsics::discriminant_value;

#[repr(usize)]
enum MyWeirdOption<T> {
//~^ ERROR parameter `T` is never used
    None = 0,
    Some = std::mem::size_of::<T>(),
    //~^ ERROR generic parameters may not be used in enum discriminant values
}

fn main() {
    assert_eq!(discriminant_value(&MyWeirdOption::<u8>::None), 0);
    assert_eq!(discriminant_value(&MyWeirdOption::<u8>::Some), 1);
}