if let guard stabilize

Author: Kivooeo

compiler/rustc_ast/src/lib.rs

@@ -6,6 +6,7 @@
 
 // tidy-alphabetical-start
 #![allow(internal_features)]
+#![cfg_attr(bootstrap, feature(if_let_guard))]
 #![doc(
     html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/",
     test(attr(deny(warnings)))
@@ -14,7 +15,6 @@
 #![feature(array_windows)]
 #![feature(associated_type_defaults)]
 #![feature(box_patterns)]
-#![feature(if_let_guard)]
 #![feature(macro_metavar_expr)]
 #![feature(rustdoc_internals)]
 #![recursion_limit = "256"]

compiler/rustc_ast_lowering/src/lib.rs

@@ -32,9 +32,10 @@
 
 // tidy-alphabetical-start
 #![allow(internal_features)]
+#![cfg_attr(bootstrap, feature(if_let_guard))]
 #![doc(rust_logo)]
 #![feature(box_patterns)]
-#![feature(if_let_guard)]
+#![feature(exact_size_is_empty)]
 #![feature(rustdoc_internals)]
 // tidy-alphabetical-end
 

compiler/rustc_ast_passes/src/feature_gate.rs

@@ -464,11 +464,6 @@ pub fn check_crate(krate: &ast::Crate, sess: &Session, features: &Features) {
             }
         };
     }
-    gate_all!(
-        if_let_guard,
-        "`if let` guards are experimental",
-        "you can write `if matches!(<expr>, <pattern>)` instead of `if let <pattern> = <expr>`"
-    );
     gate_all!(
         async_trait_bounds,
         "`async` trait bounds are unstable",

compiler/rustc_ast_passes/src/lib.rs

@@ -4,9 +4,9 @@
 
 // tidy-alphabetical-start
 #![allow(internal_features)]
+#![cfg_attr(bootstrap, feature(if_let_guard))]
 #![doc(rust_logo)]
 #![feature(box_patterns)]
-#![feature(if_let_guard)]
 #![feature(iter_is_partitioned)]
 #![feature(rustdoc_internals)]
 // tidy-alphabetical-end

compiler/rustc_borrowck/src/lib.rs

@@ -2,11 +2,11 @@
 
 // tidy-alphabetical-start
 #![allow(internal_features)]
+#![cfg_attr(bootstrap, feature(if_let_guard))]
 #![doc(rust_logo)]
 #![feature(assert_matches)]
 #![feature(box_patterns)]
 #![feature(file_buffered)]
-#![feature(if_let_guard)]
 #![feature(negative_impls)]
 #![feature(never_type)]
 #![feature(rustc_attrs)]

compiler/rustc_builtin_macros/src/lib.rs

@@ -5,13 +5,14 @@
 #![allow(internal_features)]
 #![allow(rustc::diagnostic_outside_of_impl)]
 #![allow(rustc::untranslatable_diagnostic)]
+#![cfg_attr(bootstrap, feature(if_let_guard))]
+#![cfg_attr(not(bootstrap), feature(autodiff))]
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![doc(rust_logo)]
 #![feature(assert_matches)]
 #![feature(autodiff)]
 #![feature(box_patterns)]
 #![feature(decl_macro)]
-#![feature(if_let_guard)]
 #![feature(proc_macro_internals)]
 #![feature(proc_macro_quote)]
 #![feature(rustdoc_internals)]

compiler/rustc_codegen_llvm/src/lib.rs

@@ -6,12 +6,12 @@
 
 // tidy-alphabetical-start
 #![allow(internal_features)]
+#![cfg_attr(bootstrap, feature(if_let_guard))]
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![doc(rust_logo)]
 #![feature(assert_matches)]
 #![feature(extern_types)]
 #![feature(file_buffered)]
-#![feature(if_let_guard)]
 #![feature(impl_trait_in_assoc_type)]
 #![feature(iter_intersperse)]
 #![feature(rustdoc_internals)]

compiler/rustc_codegen_ssa/src/lib.rs

@@ -2,12 +2,12 @@
 #![allow(internal_features)]
 #![allow(rustc::diagnostic_outside_of_impl)]
 #![allow(rustc::untranslatable_diagnostic)]
+#![cfg_attr(bootstrap, feature(if_let_guard))]
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![doc(rust_logo)]
 #![feature(assert_matches)]
 #![feature(box_patterns)]
 #![feature(file_buffered)]
-#![feature(if_let_guard)]
 #![feature(negative_impls)]
 #![feature(rustdoc_internals)]
 #![feature(string_from_utf8_lossy_owned)]

compiler/rustc_const_eval/src/lib.rs

@@ -1,11 +1,11 @@
 // tidy-alphabetical-start
 #![allow(internal_features)]
 #![allow(rustc::diagnostic_outside_of_impl)]
+#![cfg_attr(bootstrap, feature(if_let_guard))]
 #![doc(rust_logo)]
 #![feature(assert_matches)]
 #![feature(box_patterns)]
 #![feature(decl_macro)]
-#![feature(if_let_guard)]
 #![feature(never_type)]
 #![feature(rustdoc_internals)]
 #![feature(slice_ptr_get)]

compiler/rustc_errors/src/lib.rs

@@ -8,6 +8,7 @@
 #![allow(rustc::diagnostic_outside_of_impl)]
 #![allow(rustc::direct_use_of_rustc_type_ir)]
 #![allow(rustc::untranslatable_diagnostic)]
+#![cfg_attr(bootstrap, feature(if_let_guard))]
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![doc(rust_logo)]
 #![feature(array_windows)]