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 use std::mem;
  14
  15 /// Returns the size of a type
  16 pub fn size_of<T>() -> usize {
  17     TypeInfo::size_of(None::<T>)
  18 }
  19
  20 /// Returns the size of the type that `val` points to
  21 pub fn size_of_val<T>(val: &T) -> usize {
  22     val.size_of_val()
  23 }
  24
  25 pub trait TypeInfo: Sized {
  26     fn size_of(_lame_type_hint: Option<Self>) -> usize;
  27     fn size_of_val(&self) -> usize;
  28 }
  29
  30 impl<T> TypeInfo for T {
  31     /// The size of the type in bytes.
  32     fn size_of(_lame_type_hint: Option<T>) -> usize {
  33         mem::size_of::<T>()
  34     }
  35
  36     /// Returns the size of the type of `self` in bytes.
  37     fn size_of_val(&self) -> usize {
  38         TypeInfo::size_of(None::<T>)
  39     }
  40 }
  41
  42 pub fn main() {}