Update tests with new feature gate

src/test/ui/consts/auxiliary/const_fn_lib.rs

@@ -1,6 +1,6 @@
 // Crate that exports a const fn. Used for testing cross-crate.
 
-#![feature(const_fn)]
+#![feature(const_fn_fn_ptr_basics)]
 #![crate_type="rlib"]
 
 pub const fn foo() -> usize { 22 }

src/test/ui/consts/const-eval/issue-70804-fn-subtyping.rs

@@ -1,5 +1,5 @@
 // check-pass
-#![feature(const_fn)]
+#![feature(const_fn_fn_ptr_basics)]
 
 const fn nested(x: (for<'a> fn(&'a ()), String)) -> (fn(&'static ()), String) {
     x

src/test/ui/consts/const-extern-fn/const-extern-fn-min-const-fn.rs

@@ -2,7 +2,7 @@
 
 const extern fn unsize(x: &[u8; 3]) -> &[u8] { x }
 const unsafe extern "C" fn closure() -> fn() { || {} }
-//~^ ERROR function pointers in const fn are unstable
+//~^ ERROR function pointer
 const unsafe extern fn use_float() { 1.0 + 1.0; }
 //~^ ERROR floating point arithmetic
 const extern "C" fn ptr_cast(val: *const u8) { val as usize; }

src/test/ui/consts/issue-37550.rs

@@ -2,7 +2,7 @@
 #![allow(dead_code)]
 #![allow(unused_variables)]
 
-#![feature(const_fn)]
+#![feature(const_fn_fn_ptr_basics)]
 
 const fn x() {
     let t = true;

src/test/ui/consts/issue-56164.rs

@@ -1,12 +1,11 @@
-#![feature(const_fn)]
+#![feature(const_fn_fn_ptr_basics)]
 
 const fn foo() { (||{})() }
-//~^ ERROR calls in constant functions are limited to constant functions, tuple structs and tuple
-// variants
+//~^ ERROR calls in constant functions
 
 const fn bad(input: fn()) {
     input()
-    //~^ ERROR function pointers are not allowed in const fn
+    //~^ ERROR function pointer
 }
 
 fn main() {

src/test/ui/consts/min_const_fn/allow_const_fn_ptr.rs

@@ -1,12 +1,14 @@
-#![feature(rustc_attrs, staged_api)]
+#![feature(rustc_attrs, staged_api, allow_internal_unstable)]
+#![feature(const_fn_fn_ptr_basics)]
 
 #[stable(feature = "rust1", since = "1.0.0")]
 #[rustc_const_stable(since="1.0.0", feature = "mep")]
-const fn error(_: fn()) {} //~ ERROR function pointers in const fn are unstable
+const fn error(_: fn()) {}
+//~^ ERROR const-stable function cannot use `#[feature(const_fn_fn_ptr_basics)]`
 
 #[stable(feature = "rust1", since = "1.0.0")]
-#[rustc_allow_const_fn_ptr]
 #[rustc_const_stable(since="1.0.0", feature = "mep")]
+#[allow_internal_unstable(const_fn_fn_ptr_basics)]
 const fn compiles(_: fn()) {}
 
 fn main() {}

src/test/ui/consts/min_const_fn/allow_const_fn_ptr_feature_gate.rs

@@ -2,10 +2,13 @@
 
 #[stable(feature = "rust1", since = "1.0.0")]
 const fn error(_: fn()) {}
+//~^ ERROR `rustc_const_stable` or `rustc_const_unstable`
+//~| ERROR `rustc_const_stable` or `rustc_const_unstable`
+//~| ERROR function pointers
 
 #[stable(feature = "rust1", since = "1.0.0")]
-#[rustc_allow_const_fn_ptr]
-//~^ ERROR internal implementation detail
+#[rustc_const_stable(since="1.0.0", feature = "mep")]
 const fn compiles(_: fn()) {}
+//~^ ERROR function pointers
 
 fn main() {}

src/test/ui/consts/min_const_fn/allow_const_fn_ptr_run_pass.rs

@@ -1,11 +1,13 @@
 // run-pass
+#![feature(allow_internal_unstable)]
+#![feature(const_fn_fn_ptr_basics)]
 
 #![feature(rustc_attrs, staged_api)]
 #![stable(feature = "rust1", since = "1.0.0")]
 
 #[stable(feature = "rust1", since = "1.0.0")]
-#[rustc_allow_const_fn_ptr]
 #[rustc_const_stable(since="1.0.0", feature = "mep")]
+#[allow_internal_unstable(const_fn_fn_ptr_basics)]
 const fn takes_fn_ptr(_: fn()) {}
 
 const FN: fn() = || ();

src/test/ui/consts/min_const_fn/cast_errors.rs

@@ -2,12 +2,12 @@ fn main() {}
 
 const fn unsize(x: &[u8; 3]) -> &[u8] { x }
 const fn closure() -> fn() { || {} }
-//~^ ERROR function pointers in const fn are unstable
+//~^ ERROR function pointer
 const fn closure2() {
     (|| {}) as fn();
-//~^ ERROR function pointers in const fn are unstable
+//~^ ERROR function pointer
 }
 const fn reify(f: fn()) -> unsafe fn() { f }
-//~^ ERROR function pointers in const fn are unstable
+//~^ ERROR function pointer
 const fn reify2() { main as unsafe fn(); }
-//~^ ERROR function pointers in const fn are unstable
+//~^ ERROR function pointer

src/test/ui/consts/min_const_fn/cmp_fn_pointers.rs

@@ -1,4 +1,4 @@
-const fn cmp(x: fn(), y: fn()) -> bool { //~ ERROR function pointers in const fn are unstable
+const fn cmp(x: fn(), y: fn()) -> bool { //~ ERROR function pointer
     unsafe { x == y }
 }
 

src/test/ui/consts/min_const_fn/min_const_fn.rs

@@ -128,6 +128,6 @@ const fn really_no_traits_i_mean_it() { (&() as &dyn std::fmt::Debug, ()).1 }
 //~^ ERROR trait bounds other than `Sized`
 
 const fn no_fn_ptrs(_x: fn()) {}
-//~^ ERROR function pointers in const fn are unstable
+//~^ ERROR function pointer
 const fn no_fn_ptrs2() -> fn() { fn foo() {} foo }
-//~^ ERROR function pointers in const fn are unstable
+//~^ ERROR function pointer

src/test/ui/consts/min_const_fn/min_const_fn_fn_ptr.rs

@@ -9,9 +9,9 @@ fn field() {}
 const fn no_inner_dyn_trait(_x: Hide) {}
 const fn no_inner_dyn_trait2(x: Hide) {
     x.0.field;
-//~^ ERROR function pointers in const fn
+//~^ ERROR function pointer
 }
 const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasPtr { field }) }
-//~^ ERROR function pointers in const fn
+//~^ ERROR function pointer
 
 fn main() {}

src/test/ui/issues/issue-37550.rs

@@ -1,6 +1,6 @@
 const fn x() {
     let t = true;
-    let x = || t; //~ ERROR function pointers in const fn are unstable
+    let x = || t; //~ ERROR function pointer
 }
 
 fn main() {}

src/test/ui/issues/issue-46553.rs

@@ -1,5 +1,5 @@
 // run-pass
-#![feature(const_fn)]
+#![feature(const_fn_fn_ptr_basics)]
 #![deny(const_err)]
 
 pub struct Data<T> {

src/test/ui/type-alias-impl-trait/issue-53096.rs

@@ -1,5 +1,5 @@
 // check-pass
-#![feature(const_fn)]
+#![feature(const_fn, const_fn_fn_ptr_basics)]
 #![feature(type_alias_impl_trait)]
 
 type Foo = impl Fn() -> usize;