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-rw-r--r--src/test/ui/on-unimplemented/multiple-impls.rs42
1 files changed, 42 insertions, 0 deletions
diff --git a/src/test/ui/on-unimplemented/multiple-impls.rs b/src/test/ui/on-unimplemented/multiple-impls.rs
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+++ b/src/test/ui/on-unimplemented/multiple-impls.rs
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+// Test if the on_unimplemented message override works
+
+#![feature(rustc_attrs)]
+
+
+struct Foo<T>(T);
+struct Bar<T>(T);
+
+#[rustc_on_unimplemented = "trait message"]
+trait Index<Idx: ?Sized> {
+ type Output: ?Sized;
+ fn index(&self, index: Idx) -> &Self::Output;
+}
+
+#[rustc_on_unimplemented = "on impl for Foo"]
+impl Index<Foo<usize>> for [i32] {
+ type Output = i32;
+ fn index(&self, _index: Foo<usize>) -> &i32 {
+ loop {}
+ }
+}
+
+#[rustc_on_unimplemented = "on impl for Bar"]
+impl Index<Bar<usize>> for [i32] {
+ type Output = i32;
+ fn index(&self, _index: Bar<usize>) -> &i32 {
+ loop {}
+ }
+}
+
+
+fn main() {
+ Index::index(&[] as &[i32], 2u32);
+ //~^ ERROR E0277
+ //~| ERROR E0277
+ Index::index(&[] as &[i32], Foo(2u32));
+ //~^ ERROR E0277
+ //~| ERROR E0277
+ Index::index(&[] as &[i32], Bar(2u32));
+ //~^ ERROR E0277
+ //~| ERROR E0277
+}