src/test/compile-fail/enum-to-float-cast.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 enum-to-float casts are disallowed.
  12
  13 enum E {
  14     L0 = -1,
  15     H0 = 1
  16 }
  17
  18 enum F {
  19     L1 = 1,
  20     H1 = 0xFFFFFFFFFFFFFFFF
  21 }
  22
  23 static C0: f32 = E::L0 as f32; //~ ERROR illegal cast
  24 static C1: f32 = F::H1 as f32; //~ ERROR illegal cast
  25
  26 pub fn main() {
  27     let b = C0;
  28     let d = C1;
  29     assert_eq!(b, -1.0f32);
  30     assert_eq!(d, -1.0f32);
  31 }