Rollup merge of rust-lang#81940 - jhpratt:stabilize-str_split_once, r=m-ou-se

Stabilize str_split_once

Closes rust-lang#74773

Author: GuillaumeGomez

compiler/rustc_codegen_cranelift/src/lib.rs

@@ -5,8 +5,7 @@
     associated_type_bounds,
     never_type,
     try_blocks,
-    hash_drain_filter,
-    str_split_once
+    hash_drain_filter
 )]
 #![warn(rust_2018_idioms)]
 #![warn(unused_lifetimes)]

compiler/rustc_mir/src/lib.rs

@@ -28,7 +28,6 @@ Rust MIR: a lowered representation of Rust.
 #![feature(or_patterns)]
 #![feature(once_cell)]
 #![feature(control_flow_enum)]
-#![feature(str_split_once)]
 #![recursion_limit = "256"]
 
 #[macro_use]

compiler/rustc_session/src/lib.rs

@@ -1,7 +1,6 @@
 #![feature(crate_visibility_modifier)]
 #![feature(once_cell)]
 #![feature(or_patterns)]
-#![feature(str_split_once)]
 
 #[macro_use]
 extern crate bitflags;

compiler/rustc_span/src/lib.rs

@@ -22,7 +22,6 @@
 #![feature(nll)]
 #![feature(min_specialization)]
 #![feature(option_expect_none)]
-#![feature(str_split_once)]
 
 #[macro_use]
 extern crate rustc_macros;

compiler/rustc_target/src/lib.rs

@@ -15,7 +15,6 @@
 #![feature(never_type)]
 #![feature(associated_type_bounds)]
 #![feature(exhaustive_patterns)]
-#![feature(str_split_once)]
 
 #[macro_use]
 extern crate rustc_macros;

library/alloc/tests/lib.rs

@@ -6,7 +6,6 @@
 #![feature(exact_size_is_empty)]
 #![feature(new_uninit)]
 #![feature(pattern)]
-#![feature(str_split_once)]
 #![feature(trusted_len)]
 #![feature(try_reserve)]
 #![feature(unboxed_closures)]

library/core/src/str/mod.rs

@@ -1506,13 +1506,11 @@ impl str {
     /// # Examples
     ///
     /// ```
-    /// #![feature(str_split_once)]
-    ///
     /// assert_eq!("cfg".split_once('='), None);
     /// assert_eq!("cfg=foo".split_once('='), Some(("cfg", "foo")));
     /// assert_eq!("cfg=foo=bar".split_once('='), Some(("cfg", "foo=bar")));
     /// ```
-    #[unstable(feature = "str_split_once", reason = "newly added", issue = "74773")]
+    #[stable(feature = "str_split_once", since = "1.52.0")]
     #[inline]
     pub fn split_once<'a, P: Pattern<'a>>(&'a self, delimiter: P) -> Option<(&'a str, &'a str)> {
         let (start, end) = delimiter.into_searcher(self).next_match()?;
@@ -1525,13 +1523,11 @@ impl str {
     /// # Examples
     ///
     /// ```
-    /// #![feature(str_split_once)]
-    ///
     /// assert_eq!("cfg".rsplit_once('='), None);
     /// assert_eq!("cfg=foo".rsplit_once('='), Some(("cfg", "foo")));
     /// assert_eq!("cfg=foo=bar".rsplit_once('='), Some(("cfg=foo", "bar")));
     /// ```
-    #[unstable(feature = "str_split_once", reason = "newly added", issue = "74773")]
+    #[stable(feature = "str_split_once", since = "1.52.0")]
     #[inline]
     pub fn rsplit_once<'a, P>(&'a self, delimiter: P) -> Option<(&'a str, &'a str)>
     where

library/std/src/lib.rs

@@ -314,7 +314,6 @@
 #![feature(stdsimd)]
 #![feature(stmt_expr_attributes)]
 #![feature(str_internals)]
-#![feature(str_split_once)]
 #![feature(test)]
 #![feature(thread_local)]
 #![feature(thread_local_internals)]

library/test/src/lib.rs

@@ -31,7 +31,6 @@
 #![feature(termination_trait_lib)]
 #![feature(test)]
 #![feature(total_cmp)]
-#![feature(str_split_once)]
 
 // Public reexports
 pub use self::bench::{black_box, Bencher};

src/librustdoc/lib.rs

@@ -14,7 +14,6 @@
 #![feature(never_type)]
 #![feature(once_cell)]
 #![feature(type_ascription)]
-#![feature(str_split_once)]
 #![feature(iter_intersperse)]
 #![recursion_limit = "256"]
 #![deny(rustc::internal)]

src/tools/linkchecker/main.rs

@@ -14,7 +14,7 @@
 //! A few exceptions are allowed as there's known bugs in rustdoc, but this
 //! should catch the majority of "broken link" cases.
 
-#![feature(str_split_once)]
+#![cfg_attr(bootstrap, feature(str_split_once))]
 
 use std::collections::hash_map::Entry;
 use std::collections::{HashMap, HashSet};

src/tools/tidy/src/lib.rs

@@ -3,7 +3,7 @@
 //! This library contains the tidy lints and exposes it
 //! to be used by tools.
 
-#![feature(str_split_once)]
+#![cfg_attr(bootstrap, feature(str_split_once))]
 
 use std::fs::File;
 use std::io::Read;