src/test/auxiliary/lang-item-public.rs

   1 // Copyright 2014 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 #![feature(no_std)]
  12 #![no_std]
  13 #![feature(lang_items)]
  14
  15 #[lang="phantom_fn"]
  16 pub trait PhantomFn<A:?Sized,R:?Sized=()> { }
  17 impl<A:?Sized, R:?Sized, U:?Sized> PhantomFn<A,R> for U { }
  18
  19 #[lang="sized"]
  20 pub trait Sized : PhantomFn<Self> {}
  21
  22 #[lang="panic"]
  23 fn panic(_: &(&'static str, &'static str, usize)) -> ! { loop {} }
  24
  25 #[lang = "stack_exhausted"]
  26 extern fn stack_exhausted() {}
  27
  28 #[lang = "eh_personality"]
  29 extern fn eh_personality() {}
  30
  31 #[lang="copy"]
  32 pub trait Copy : PhantomFn<Self> {
  33     // Empty.
  34 }
  35
  36 #[lang="rem"]
  37 pub trait Rem<RHS=Self> {
  38     type Output = Self;
  39     fn rem(self, rhs: RHS) -> Self::Output;
  40 }
  41
  42 impl Rem for isize {
  43     type Output = isize;
  44
  45     #[inline]
  46     fn rem(self, other: isize) -> isize {
  47         // if you use `self % other` here, as one would expect, you
  48         // get back an error because of potential failure/overflow,
  49         // which tries to invoke error fns that don't have the
  50         // appropriate signatures anymore. So...just return 0.
  51         0
  52     }
  53 }