src/test/auxiliary/svh-a-macro.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 //! The `svh-a-*.rs` files are all deviations from the base file
  12 //! svh-a-base.rs with some difference (usually in `fn foo`) that
  13 //! should not affect the strict version hash (SVH) computation
  14 //! (#14132).
  15
  16 #![crate_name = "a"]
  17
  18 use std::marker::MarkerTrait;
  19
  20 macro_rules! three {
  21     () => { 3 }
  22 }
  23
  24 pub trait U : MarkerTrait {}
  25 pub trait V : MarkerTrait {}
  26 impl U for () {}
  27 impl V for () {}
  28
  29 static A_CONSTANT : int = 2;
  30
  31 pub fn foo<T:U>(_: int) -> int {
  32     // a macro invocation in a function body does not affect the svh,
  33     // as long as it yields the same code.
  34     three!()
  35 }
  36
  37 pub fn an_unused_name() -> int {
  38     4
  39 }