src/test/compile-fail/associated-types-path-2.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 // Test type checking of uses of associated types via sugary paths.
  12
  13 pub trait Foo {
  14     type A;
  15
  16     fn dummy(&self) { }
  17 }
  18
  19 impl Foo for i32 {
  20     type A = u32;
  21 }
  22
  23 pub fn f1<T: Foo>(a: T, x: T::A) {}
  24 pub fn f2<T: Foo>(a: T) -> T::A {
  25     panic!();
  26 }
  27
  28 pub fn f1_int_int() {
  29     f1(2i32, 4i32);
  30     //~^ ERROR mismatched types
  31     //~| expected u32, found i32
  32 }
  33
  34 pub fn f1_int_uint() {
  35     f1(2i32, 4u32);
  36 }
  37
  38 pub fn f1_uint_uint() {
  39     f1(2u32, 4u32);
  40     //~^ ERROR `u32: Foo` is not satisfied
  41 }
  42
  43 pub fn f1_uint_int() {
  44     f1(2u32, 4i32);
  45     //~^ ERROR `u32: Foo` is not satisfied
  46 }
  47
  48 pub fn f2_int() {
  49     let _: i32 = f2(2i32);
  50     //~^ ERROR mismatched types
  51     //~| expected i32, found u32
  52 }
  53
  54 pub fn main() { }