mirror of https://github.com/rust-lang/rust
39 lines
806 B
Rust
39 lines
806 B
Rust
// Test that when a trait impl changes, fns whose body uses that trait
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// must also be recompiled.
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//@ incremental
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//@ compile-flags: -Z query-dep-graph
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#![feature(rustc_attrs)]
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#![allow(warnings)]
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fn main() { }
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pub trait Foo: Sized {
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type T;
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fn method(self) { }
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}
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mod x {
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use Foo;
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#[rustc_if_this_changed]
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impl Foo for char { type T = char; }
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impl Foo for u32 { type T = u32; }
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}
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mod y {
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use Foo;
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#[rustc_then_this_would_need(typeck)] //~ ERROR OK
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pub fn use_char_assoc() {
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// Careful here: in the representation, <char as Foo>::T gets
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// normalized away, so at a certain point we had no edge to
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// codegen. (But now codegen just depends on typeck.)
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let x: <char as Foo>::T = 'a';
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}
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pub fn take_foo<T:Foo>(t: T) { }
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}
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