Stabilize macro_literal_matcher

src/test/run-pass/issues/issue-52169.rs

@@ -9,7 +9,7 @@
 // except according to those terms.
 
 // run-pass
-#![feature(macro_literal_matcher)]
+#![cfg_attr(stage0, feature(macro_literal_matcher))]
 
 macro_rules! a {
     ($i:literal) => { "right" };

src/test/run-pass/macros/macro-literal.rs

@@ -9,7 +9,7 @@
 // except according to those terms.
 
 // run-pass
-#![feature(macro_literal_matcher)]
+#![cfg_attr(stage0, feature(macro_literal_matcher))]
 
 macro_rules! mtester {
     ($l:literal) => {

src/test/ui/feature-gates/feature-gate-macro-literal-matcher.rs

@@ -1,19 +0,0 @@
-// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-// Test that the :lifetime macro fragment cannot be used when macro_lifetime_matcher
-// feature gate is not used.
-
-macro_rules! m { ($lt:literal) => {} }
-//~^ ERROR :literal fragment specifier is experimental and subject to change
-
-fn main() {
-    m!("some string literal");
-}

src/test/ui/feature-gates/feature-gate-macro-literal-matcher.stderr

@@ -1,11 +0,0 @@
-error[E0658]: :literal fragment specifier is experimental and subject to change (see issue #35625)
-  --> $DIR/feature-gate-macro-literal-matcher.rs:14:19
-   |
-LL | macro_rules! m { ($lt:literal) => {} }
-   |                   ^^^^^^^^^^^
-   |
-   = help: add #![feature(macro_literal_matcher)] to the crate attributes to enable
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0658`.