add test for rust-lang#116796

bvanjoi · Dec 23, 2023 · 0f814e3 · 0f814e3
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diff --git a/tests/ui/const-generics/default-ty-closure.rs b/tests/ui/const-generics/default-ty-closure.rs
@@ -0,0 +1,6 @@
+// https://github.com/rust-lang/rust/issues/116796
+
+struct X<const FN: fn() = { || {} }>;
+//~^ ERROR using function pointers as const generic parameters is forbidden
+
+fn main() {}
diff --git a/tests/ui/const-generics/default-ty-closure.stderr b/tests/ui/const-generics/default-ty-closure.stderr
@@ -0,0 +1,10 @@
+error: using function pointers as const generic parameters is forbidden
+  --> $DIR/default-ty-closure.rs:3:20
+   |
+LL | struct X<const FN: fn() = { || {} }>;
+   |                    ^^^^
+   |
+   = note: the only supported types are integers, `bool` and `char`
+
+error: aborting due to 1 previous error
+