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Diffstat (limited to '')
-rw-r--r-- | src/test/ui/dep-graph/dep-graph-assoc-type-codegen.rs | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/src/test/ui/dep-graph/dep-graph-assoc-type-codegen.rs b/src/test/ui/dep-graph/dep-graph-assoc-type-codegen.rs new file mode 100644 index 000000000..978c19948 --- /dev/null +++ b/src/test/ui/dep-graph/dep-graph-assoc-type-codegen.rs @@ -0,0 +1,38 @@ +// 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 { + type T; + fn method(self) { } +} + +mod x { + use Foo; + + #[rustc_if_this_changed] + impl Foo for char { type T = char; } + + impl Foo for u32 { type T = u32; } +} + +mod y { + use Foo; + + #[rustc_then_this_would_need(typeck)] //~ ERROR OK + pub fn use_char_assoc() { + // Careful here: in the representation, <char as Foo>::T gets + // normalized away, so at a certain point we had no edge to + // codegen. (But now codegen just depends on typeck.) + let x: <char as Foo>::T = 'a'; + } + + pub fn take_foo<T:Foo>(t: T) { } +} |