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-rw-r--r--src/test/ui/rfc-2632-const-trait-impl/tilde-const-and-const-params.rs34
1 files changed, 34 insertions, 0 deletions
diff --git a/src/test/ui/rfc-2632-const-trait-impl/tilde-const-and-const-params.rs b/src/test/ui/rfc-2632-const-trait-impl/tilde-const-and-const-params.rs
new file mode 100644
index 000000000..78a64b901
--- /dev/null
+++ b/src/test/ui/rfc-2632-const-trait-impl/tilde-const-and-const-params.rs
@@ -0,0 +1,34 @@
+#![feature(const_trait_impl)]
+#![feature(generic_arg_infer)]
+#![feature(generic_const_exprs)]
+#![allow(incomplete_features)]
+
+struct Foo<const N: usize>;
+
+impl<const N: usize> Foo<N> {
+ fn add<A: ~const Add42>(self) -> Foo<{ A::add(N) }> {
+ Foo
+ }
+}
+
+#[const_trait]
+trait Add42 {
+ fn add(a: usize) -> usize;
+}
+
+impl const Add42 for () {
+ fn add(a: usize) -> usize {
+ a + 42
+ }
+}
+
+fn bar<A: ~const Add42, const N: usize>(_: Foo<N>) -> Foo<{ A::add(N) }> {
+ //~^ ERROR `~const` is not allowed here
+ Foo
+}
+
+fn main() {
+ let foo = Foo::<0>;
+ let foo = bar::<(), _>(foo);
+ let _foo = bar::<(), _>(foo);
+}