Parse and feature gate raw address of expressions

Author: matthewjasper

src/librustc_parse/parser/expr.rs

@@ -592,7 +592,7 @@ impl<'a> Parser<'a> {
         }
     }
 
-    /// Parse `& mut? <expr>` or `& raw [ const | mut ] <expr>`
+    /// Parse `& mut? <expr>` or `& raw [ const | mut ] <expr>`.
     fn parse_address_of(&mut self, lo: Span) -> PResult<'a, (Span, ExprKind)> {
         self.expect_and()?;
         let (k, m) = if self.check_keyword(kw::Raw)

src/libsyntax/feature_gate/active.rs

@@ -520,13 +520,16 @@ declare_features! (
     /// Allows using the `efiapi` ABI.
     (active, abi_efiapi, "1.40.0", Some(65815), None),
 
+    /// Allows `&raw const $place_expr` and `&raw mut $place_expr` expressions.
+    (active, raw_ref_op, "1.41.0", Some(64490), None),
+
     /// Allows diverging expressions to fall back to `!` rather than `()`.
     (active, never_type_fallback, "1.41.0", Some(65992), None),
 
     /// Allows using the `#[register_attr]` attribute.
     (active, register_attr, "1.41.0", Some(66080), None),
 
-    /// Allows using the `#[register_attr]` attribute.
+    /// Allows using the `#[register_tool]` attribute.
     (active, register_tool, "1.41.0", Some(66079), None),
 
     /// Allows the use of `if` and `match` in constants.

src/libsyntax/feature_gate/check.rs

@@ -866,6 +866,7 @@ pub fn check_crate(krate: &ast::Crate,
     gate_all!(generators, "yield syntax is experimental");
     gate_all!(or_patterns, "or-patterns syntax is experimental");
     gate_all!(const_extern_fn, "`const extern fn` definitions are unstable");
+    gate_all!(raw_ref_op, "raw address of syntax is experimental");
 
     // All uses of `gate_all!` below this point were added in #65742,
     // and subsequently disabled (with the non-early gating readded).

src/libsyntax_pos/symbol.rs

@@ -98,6 +98,7 @@ symbols! {
         Auto:               "auto",
         Catch:              "catch",
         Default:            "default",
+        Raw:                "raw",
         Union:              "union",
     }
 
@@ -546,6 +547,7 @@ symbols! {
         RangeToInclusive,
         raw_dylib,
         raw_identifiers,
+        raw_ref_op,
         Ready,
         reason,
         recursion_limit,