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// Test that when a trait impl changes, fns whose body uses that trait
// must also be recompiled.
//@ incremental
//@ compile-flags: -Z query-dep-graph
#![feature(rustc_attrs)]
#![allow(warnings)]
fn main() { }
pub trait Foo: Sized {
fn method(self) { }
}
mod x {
use Foo;
#[rustc_if_this_changed]
impl Foo for char { }
impl Foo for u32 { }
}
mod y {
use Foo;
#[rustc_then_this_would_need(typeck)] //~ ERROR OK
pub fn with_char() {
char::method('a');
}
#[rustc_then_this_would_need(typeck)] //~ ERROR OK
pub fn take_foo_with_char() {
take_foo::<char>('a');
}
#[rustc_then_this_would_need(typeck)] //~ ERROR OK
pub fn with_u32() {
u32::method(22);
}
#[rustc_then_this_would_need(typeck)] //~ ERROR OK
pub fn take_foo_with_u32() {
take_foo::<u32>(22);
}
pub fn take_foo<T:Foo>(t: T) { }
}
mod z {
use y;
// These are expected to yield errors, because changes to `x`
// affect the BODY of `y`, but not its signature.
#[rustc_then_this_would_need(typeck)] //~ ERROR no path
pub fn z() {
y::with_char();
y::with_u32();
}
}
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