src/test/auxiliary/specialization_cross_crate.rs

   1 // Copyright 2015 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(specialization)]
  12
  13 pub trait Foo {
  14     fn foo(&self) -> &'static str;
  15 }
  16
  17 impl<T> Foo for T {
  18     default fn foo(&self) -> &'static str {
  19         "generic"
  20     }
  21 }
  22
  23 impl<T: Clone> Foo for T {
  24     default fn foo(&self) -> &'static str {
  25         "generic Clone"
  26     }
  27 }
  28
  29 impl<T, U> Foo for (T, U) where T: Clone, U: Clone {
  30     default fn foo(&self) -> &'static str {
  31         "generic pair"
  32     }
  33 }
  34
  35 impl<T: Clone> Foo for (T, T) {
  36     default fn foo(&self) -> &'static str {
  37         "generic uniform pair"
  38     }
  39 }
  40
  41 impl Foo for (u8, u32) {
  42     default fn foo(&self) -> &'static str {
  43         "(u8, u32)"
  44     }
  45 }
  46
  47 impl Foo for (u8, u8) {
  48     default fn foo(&self) -> &'static str {
  49         "(u8, u8)"
  50     }
  51 }
  52
  53 impl<T: Clone> Foo for Vec<T> {
  54     default fn foo(&self) -> &'static str {
  55         "generic Vec"
  56     }
  57 }
  58
  59 impl Foo for Vec<i32> {
  60     fn foo(&self) -> &'static str {
  61         "Vec<i32>"
  62     }
  63 }
  64
  65 impl Foo for String {
  66     fn foo(&self) -> &'static str {
  67         "String"
  68     }
  69 }
  70
  71 impl Foo for i32 {
  72     fn foo(&self) -> &'static str {
  73         "i32"
  74     }
  75 }
  76
  77 pub trait MyMarker {}
  78 impl<T: Clone + MyMarker> Foo for T {
  79     default fn foo(&self) -> &'static str {
  80         "generic Clone + MyMarker"
  81     }
  82 }