src/test/run-pass/expr-if-generic.rs

   1 // Copyright 2012-2014 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 // pretty-expanded FIXME #23616
  12
  13 fn test_generic<T, F>(expected: T, not_expected: T, eq: F) where
  14     T: Clone,
  15     F: FnOnce(T, T) -> bool,
  16 {
  17     let actual: T = if true { expected.clone() } else { not_expected };
  18     assert!(eq(expected, actual));
  19 }
  20
  21 fn test_bool() {
  22     fn compare_bool(b1: bool, b2: bool) -> bool { return b1 == b2; }
  23     test_generic::<bool, _>(true, false, compare_bool);
  24 }
  25
  26 #[derive(Clone)]
  27 struct Pair {
  28     a: isize,
  29     b: isize,
  30 }
  31
  32 fn test_rec() {
  33     fn compare_rec(t1: Pair, t2: Pair) -> bool {
  34         t1.a == t2.a && t1.b == t2.b
  35     }
  36     test_generic::<Pair, _>(Pair{a: 1, b: 2}, Pair{a: 2, b: 3}, compare_rec);
  37 }
  38
  39 pub fn main() { test_bool(); test_rec(); }