user0/rust
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

prevent potential promotion in const_discriminant

Browse source
This commit is contained in:
Bastian Kauschke 2020-03-08 15:12:46 +01:00
parent 6d03bbd480
commit 22f2385a73
1 changed files with 5 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

8
src/test/ui/consts/const_discriminant.rs
View file

@ -3,6 +3,8 @@
use std::mem::{discriminant, Discriminant};
fn identity<T>(x: T) -> T { x }
enum Test {
A(u8),
B,
@ -15,8 +17,8 @@ const TEST_B: Discriminant<Test> = discriminant(&Test::B);
fn main() {
assert_eq!(TEST_A, TEST_A_OTHER);
assert_eq!(TEST_A, discriminant(&Test::A(17)));
assert_eq!(TEST_B, discriminant(&Test::B));
assert_eq!(TEST_A, discriminant(identity(&Test::A(17))));
assert_eq!(TEST_B, discriminant(identity(&Test::B)));
assert_ne!(TEST_A, TEST_B);
assert_ne!(TEST_B, discriminant(&Test::C { a: 42, b: 7 }));
assert_ne!(TEST_B, discriminant(identity(&Test::C { a: 42, b: 7 })));
}