diff options
Diffstat (limited to 'src/test/ui/type/type-ascription.rs')
-rw-r--r-- | src/test/ui/type/type-ascription.rs | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/test/ui/type/type-ascription.rs b/src/test/ui/type/type-ascription.rs new file mode 100644 index 000000000..7adb07442 --- /dev/null +++ b/src/test/ui/type/type-ascription.rs @@ -0,0 +1,39 @@ +// run-pass + +#![allow(dead_code)] +#![allow(unused_variables)] +// Type ascription doesn't lead to unsoundness + +#![feature(type_ascription)] + +use std::mem; + +const C1: u8 = 10: u8; +const C2: [u8; 1: usize] = [1]; + +struct S { + a: u8 +} + +fn main() { + assert_eq!(C1.into(): i32, 10); + assert_eq!(C2[0], 1); + + let s = S { a: 10: u8 }; + let arr = &[1u8, 2, 3]; + + let mut v = arr.iter().cloned().collect(): Vec<_>; + v.push(4); + assert_eq!(v, [1, 2, 3, 4]); + + let a = 1: u8; + let b = a.into(): u16; + assert_eq!(v[a.into(): usize], 2); + assert_eq!(mem::size_of_val(&a), 1); + assert_eq!(mem::size_of_val(&b), 2); + assert_eq!(b, 1: u16); + + let mut v = Vec::new(); + v: Vec<u8> = vec![1, 2, 3]; // Place expression type ascription + assert_eq!(v, [1u8, 2, 3]); +} |