src/test/run-pass/issue-6898.rs

   1 // Copyright 2013 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 // pretty-expanded FIXME #23616
  12
  13 #![feature(core)]
  14
  15 use std::intrinsics;
  16
  17 /// Returns the size of a type
  18 pub fn size_of<T>() -> usize {
  19     TypeInfo::size_of(None::<T>)
  20 }
  21
  22 /// Returns the size of the type that `val` points to
  23 pub fn size_of_val<T>(val: &T) -> usize {
  24     val.size_of_val()
  25 }
  26
  27 pub trait TypeInfo {
  28     fn size_of(_lame_type_hint: Option<Self>) -> usize;
  29     fn size_of_val(&self) -> usize;
  30 }
  31
  32 impl<T> TypeInfo for T {
  33     /// The size of the type in bytes.
  34     fn size_of(_lame_type_hint: Option<T>) -> usize {
  35         unsafe { intrinsics::size_of::<T>() }
  36     }
  37
  38     /// Returns the size of the type of `self` in bytes.
  39     fn size_of_val(&self) -> usize {
  40         TypeInfo::size_of(None::<T>)
  41     }
  42 }
  43
  44 pub fn main() {}