src/test/compile-fail/transmute-type-parameters.rs

   1 // Copyright 2012 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // Tests that `transmute` cannot be called on type parameters.
  12
  13 use std::mem::transmute;
  14
  15 unsafe fn f<T>(x: T) {
  16     let _: isize = transmute(x);  //~ ERROR cannot transmute
  17 }
  18
  19 unsafe fn g<T>(x: (T, isize)) {
  20     let _: isize = transmute(x);  //~ ERROR cannot transmute
  21 }
  22
  23 unsafe fn h<T>(x: [T; 10]) {
  24     let _: isize = transmute(x);  //~ ERROR cannot transmute
  25 }
  26
  27 struct Bad<T> {
  28     f: T,
  29 }
  30
  31 unsafe fn i<T>(x: Bad<T>) {
  32     let _: isize = transmute(x);  //~ ERROR cannot transmute
  33 }
  34
  35 enum Worse<T> {
  36     A(T),
  37     B,
  38 }
  39
  40 unsafe fn j<T>(x: Worse<T>) {
  41     let _: isize = transmute(x);  //~ ERROR cannot transmute
  42 }
  43
  44 unsafe fn k<T>(x: Option<T>) {
  45     let _: isize = transmute(x);  //~ ERROR cannot transmute
  46 }
  47
  48 fn main() {}