src/test/compile-fail/dep-graph-struct-signature.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 // Test cases where a changing struct appears in the signature of fns
  12 // and methods.
  13
  14 // compile-flags: -Z query-dep-graph
  15
  16 #![feature(rustc_attrs)]
  17 #![allow(dead_code)]
  18 #![allow(unused_variables)]
  19
  20 fn main() { }
  21
  22 #[rustc_if_this_changed]
  23 struct WillChange {
  24     x: u32,
  25     y: u32
  26 }
  27
  28 struct WontChange {
  29     x: u32,
  30     y: u32
  31 }
  32
  33 // these are valid dependencies
  34 mod signatures {
  35     use WillChange;
  36
  37     #[rustc_then_this_would_need(ItemSignature)] //~ ERROR OK
  38     #[rustc_then_this_would_need(CollectItem)] //~ ERROR OK
  39     trait Bar {
  40         fn do_something(x: WillChange);
  41     }
  42
  43     #[rustc_then_this_would_need(ItemSignature)] //~ ERROR OK
  44     #[rustc_then_this_would_need(CollectItem)] //~ ERROR OK
  45     fn some_fn(x: WillChange) { }
  46
  47     #[rustc_then_this_would_need(ItemSignature)] //~ ERROR OK
  48     #[rustc_then_this_would_need(CollectItem)] //~ ERROR OK
  49     fn new_foo(x: u32, y: u32) -> WillChange {
  50         WillChange { x: x, y: y }
  51     }
  52
  53     #[rustc_then_this_would_need(ItemSignature)] //~ ERROR OK
  54     #[rustc_then_this_would_need(CollectItem)] //~ ERROR OK
  55     impl WillChange {
  56         fn new(x: u32, y: u32) -> WillChange { loop { } }
  57     }
  58
  59     #[rustc_then_this_would_need(ItemSignature)] //~ ERROR OK
  60     #[rustc_then_this_would_need(CollectItem)] //~ ERROR OK
  61     impl WillChange {
  62         fn method(&self, x: u32) { }
  63     }
  64
  65     #[rustc_then_this_would_need(ItemSignature)] //~ ERROR OK
  66     #[rustc_then_this_would_need(CollectItem)] //~ ERROR OK
  67     struct WillChanges {
  68         x: WillChange,
  69         y: WillChange
  70     }
  71
  72     #[rustc_then_this_would_need(ItemSignature)] //~ ERROR OK
  73     #[rustc_then_this_would_need(CollectItem)] //~ ERROR OK
  74     fn indirect(x: WillChanges) { }
  75 }
  76
  77 mod invalid_signatures {
  78     use WontChange;
  79
  80     #[rustc_then_this_would_need(ItemSignature)] //~ ERROR no path
  81     #[rustc_then_this_would_need(CollectItem)] //~ ERROR no path
  82     trait A {
  83         fn do_something_else_twice(x: WontChange);
  84     }
  85
  86     #[rustc_then_this_would_need(ItemSignature)] //~ ERROR no path
  87     #[rustc_then_this_would_need(CollectItem)] //~ ERROR no path
  88     fn b(x: WontChange) { }
  89
  90     #[rustc_then_this_would_need(ItemSignature)] //~ ERROR no path from `WillChange`
  91     #[rustc_then_this_would_need(CollectItem)] //~ ERROR no path from `WillChange`
  92     fn c(x: u32) { }
  93 }
  94