1 // Tests that `transmute` cannot be called on type parameters.
2
3 use std::mem::transmute;
4
f<T>(x: T)5 unsafe fn f<T>(x: T) {
6 let _: i32 = transmute(x);
7 //~^ ERROR cannot transmute between types of different sizes, or dependently-sized types
8 }
9
g<T>(x: (T, i32))10 unsafe fn g<T>(x: (T, i32)) {
11 let _: i32 = transmute(x);
12 //~^ ERROR cannot transmute between types of different sizes, or dependently-sized types
13 }
14
h<T>(x: [T; 10])15 unsafe fn h<T>(x: [T; 10]) {
16 let _: i32 = transmute(x);
17 //~^ ERROR cannot transmute between types of different sizes, or dependently-sized types
18 }
19
20 struct Bad<T> {
21 f: T,
22 }
23
i<T>(x: Bad<T>)24 unsafe fn i<T>(x: Bad<T>) {
25 let _: i32 = transmute(x);
26 //~^ ERROR cannot transmute between types of different sizes, or dependently-sized types
27 }
28
29 enum Worse<T> {
30 A(T),
31 B,
32 }
33
j<T>(x: Worse<T>)34 unsafe fn j<T>(x: Worse<T>) {
35 let _: i32 = transmute(x);
36 //~^ ERROR cannot transmute between types of different sizes, or dependently-sized types
37 }
38
k<T>(x: Option<T>)39 unsafe fn k<T>(x: Option<T>) {
40 let _: i32 = transmute(x);
41 //~^ ERROR cannot transmute between types of different sizes, or dependently-sized types
42 }
43
main()44 fn main() {}
45