feature(const_generics) -> feature(const_param_types)

src/test/ui/const-generics/generic_const_exprs/function-call.rs

@@ -0,0 +1,19 @@
+// check-pass
+
+const fn foo<T>() -> usize {
+    // We might instead branch on `std::mem::size_of::<*mut T>() < 8` here,
+    // which would cause this function to fail on 32 bit systems.
+    if false {
+        std::mem::size_of::<T>()
+    } else {
+        8
+    }
+}
+
+fn test<T>() {
+    let _ = [0; foo::<T>()];
+    //~^ WARN cannot use constants which depend on generic parameters in types
+    //~| WARN this was previously accepted by the compiler but is being phased out
+}
+
+fn main() {}