src/test/ui/dep-graph/dep-graph-trait-impl-two-traits-same-method.rs

   1 // Test that adding an impl to a trait `Foo` DOES affect functions
   2 // that only use `Bar` if they have methods in common.
   3
   4 // compile-flags: -Z query-dep-graph -C incremental=tmp/dep-graph-trait-impl-two-traits-same-method
   5
   6 #![feature(rustc_attrs)]
   7 #![allow(dead_code)]
   8 #![allow(unused_imports)]
   9
  10 fn main() { }
  11
  12 pub trait Foo: Sized {
  13     fn method(self) { }
  14 }
  15
  16 pub trait Bar: Sized {
  17     fn method(self) { }
  18 }
  19
  20 mod x {
  21     use {Foo, Bar};
  22
  23     #[rustc_if_this_changed]
  24     impl Foo for u32 { }
  25
  26     impl Bar for char { }
  27 }
  28
  29 mod y {
  30     use {Foo, Bar};
  31
  32     #[rustc_then_this_would_need(typeck)] //~ ERROR OK
  33     pub fn with_char() {
  34         char::method('a');
  35     }
  36 }
  37
  38 mod z {
  39     use y;
  40
  41     #[rustc_then_this_would_need(typeck)] //~ ERROR no path
  42     pub fn z() {
  43         y::with_char();
  44     }
  45 }