rustc_feature: remove no-longer-needed macro

Author: RalfJung

compiler/rustc_feature/src/builtin_attrs.rs

@@ -12,33 +12,31 @@ use crate::{Features, Stability};
 
 type GateFn = fn(&Features) -> bool;
 
-macro_rules! cfg_fn {
-    ($field: ident) => {
-        Features::$field as GateFn
-    };
-}
-
 pub type GatedCfg = (Symbol, Symbol, GateFn);
 
 /// `cfg(...)`'s that are feature gated.
 const GATED_CFGS: &[GatedCfg] = &[
     // (name in cfg, feature, function to check if the feature is enabled)
-    (sym::overflow_checks, sym::cfg_overflow_checks, cfg_fn!(cfg_overflow_checks)),
-    (sym::ub_checks, sym::cfg_ub_checks, cfg_fn!(cfg_ub_checks)),
-    (sym::target_thread_local, sym::cfg_target_thread_local, cfg_fn!(cfg_target_thread_local)),
+    (sym::overflow_checks, sym::cfg_overflow_checks, Features::cfg_overflow_checks),
+    (sym::ub_checks, sym::cfg_ub_checks, Features::cfg_ub_checks),
+    (sym::target_thread_local, sym::cfg_target_thread_local, Features::cfg_target_thread_local),
     (
         sym::target_has_atomic_equal_alignment,
         sym::cfg_target_has_atomic_equal_alignment,
-        cfg_fn!(cfg_target_has_atomic_equal_alignment),
-    ),
-    (sym::target_has_atomic_load_store, sym::cfg_target_has_atomic, cfg_fn!(cfg_target_has_atomic)),
-    (sym::sanitize, sym::cfg_sanitize, cfg_fn!(cfg_sanitize)),
-    (sym::version, sym::cfg_version, cfg_fn!(cfg_version)),
-    (sym::relocation_model, sym::cfg_relocation_model, cfg_fn!(cfg_relocation_model)),
-    (sym::sanitizer_cfi_generalize_pointers, sym::cfg_sanitizer_cfi, cfg_fn!(cfg_sanitizer_cfi)),
-    (sym::sanitizer_cfi_normalize_integers, sym::cfg_sanitizer_cfi, cfg_fn!(cfg_sanitizer_cfi)),
+        Features::cfg_target_has_atomic_equal_alignment,
+    ),
+    (
+        sym::target_has_atomic_load_store,
+        sym::cfg_target_has_atomic,
+        Features::cfg_target_has_atomic,
+    ),
+    (sym::sanitize, sym::cfg_sanitize, Features::cfg_sanitize),
+    (sym::version, sym::cfg_version, Features::cfg_version),
+    (sym::relocation_model, sym::cfg_relocation_model, Features::cfg_relocation_model),
+    (sym::sanitizer_cfi_generalize_pointers, sym::cfg_sanitizer_cfi, Features::cfg_sanitizer_cfi),
+    (sym::sanitizer_cfi_normalize_integers, sym::cfg_sanitizer_cfi, Features::cfg_sanitizer_cfi),
     // this is consistent with naming of the compiler flag it's for
-    (sym::fmt_debug, sym::fmt_debug, cfg_fn!(fmt_debug)),
+    (sym::fmt_debug, sym::fmt_debug, Features::fmt_debug),
 ];
 
 /// Find a gated cfg determined by the `pred`icate which is given the cfg's name.
@@ -220,7 +218,7 @@ macro_rules! gated {
             safety: AttributeSafety::Unsafe,
             template: $tpl,
             duplicates: $duplicates,
-            gate: Gated(Stability::Unstable, sym::$gate, $msg, cfg_fn!($gate)),
+            gate: Gated(Stability::Unstable, sym::$gate, $msg, Features::$gate),
         }
     };
     (unsafe $attr:ident, $typ:expr, $tpl:expr, $duplicates:expr, $encode_cross_crate:expr, $msg:expr $(,)?) => {
@@ -231,7 +229,7 @@ macro_rules! gated {
             safety: AttributeSafety::Unsafe,
             template: $tpl,
             duplicates: $duplicates,
-            gate: Gated(Stability::Unstable, sym::$attr, $msg, cfg_fn!($attr)),
+            gate: Gated(Stability::Unstable, sym::$attr, $msg, Features::$attr),
         }
     };
     ($attr:ident, $typ:expr, $tpl:expr, $duplicates:expr, $encode_cross_crate:expr, $gate:ident, $msg:expr $(,)?) => {
@@ -242,7 +240,7 @@ macro_rules! gated {
             safety: AttributeSafety::Normal,
             template: $tpl,
             duplicates: $duplicates,
-            gate: Gated(Stability::Unstable, sym::$gate, $msg, cfg_fn!($gate)),
+            gate: Gated(Stability::Unstable, sym::$gate, $msg, Features::$gate),
         }
     };
     ($attr:ident, $typ:expr, $tpl:expr, $duplicates:expr, $encode_cross_crate:expr, $msg:expr $(,)?) => {
@@ -253,7 +251,7 @@ macro_rules! gated {
             safety: AttributeSafety::Normal,
             template: $tpl,
             duplicates: $duplicates,
-            gate: Gated(Stability::Unstable, sym::$attr, $msg, cfg_fn!($attr)),
+            gate: Gated(Stability::Unstable, sym::$attr, $msg, Features::$attr),
         }
     };
 }
@@ -282,7 +280,7 @@ macro_rules! rustc_attr {
             safety: AttributeSafety::Normal,
             template: $tpl,
             duplicates: $duplicates,
-            gate: Gated(Stability::Unstable, sym::rustc_attrs, $msg, cfg_fn!(rustc_attrs)),
+            gate: Gated(Stability::Unstable, sym::rustc_attrs, $msg, Features::rustc_attrs),
         }
     };
 }
@@ -935,7 +933,7 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[
             Stability::Unstable,
             sym::rustc_attrs,
             "diagnostic items compiler internal support for linting",
-            cfg_fn!(rustc_attrs),
+            Features::rustc_attrs,
         ),
     },
     gated!(