Correct raw identifier terminology in rust_keywords

PiperOrigin-RevId: 599954613

rust/test/shared/reserved_test.rs

@@ -8,12 +8,12 @@
 /// Test covering proto compilation with reserved words.
 use googletest::prelude::*;
 use reserved_proto::r#enum;
-use reserved_proto::Self__mangled_because_symbol_is_a_rust_raw_identifier;
+use reserved_proto::Self__mangled_because_ident_isnt_a_legal_raw_identifier;
 
 #[test]
 fn test_reserved_keyword_in_accessors() {
-    let msg = Self__mangled_because_symbol_is_a_rust_raw_identifier::new();
-    let res = msg.self__mangled_because_symbol_is_a_rust_raw_identifier().r#for();
+    let msg = Self__mangled_because_ident_isnt_a_legal_raw_identifier::new();
+    let res = msg.self__mangled_because_ident_isnt_a_legal_raw_identifier().r#for();
     assert_that!(res, eq(0));
 }
 

src/google/protobuf/compiler/rust/naming.cc

@@ -246,9 +246,9 @@ std::string FieldInfoComment(Context& ctx, const FieldDescriptor& field) {
 }
 
 std::string RsSafeName(absl::string_view name) {
-  if (IsNotLegalEvenWithRPoundPrefix(name)) {
+  if (!IsLegalRawIdentifierName(name)) {
     return absl::StrCat(name,
-                        "__mangled_because_symbol_is_a_rust_raw_identifier");
+                        "__mangled_because_ident_isnt_a_legal_raw_identifier");
   }
   if (IsRustKeyword(name)) {
     return absl::StrCat("r#", name);

src/google/protobuf/compiler/rust/rust_keywords.cc

@@ -17,12 +17,12 @@ namespace protobuf {
 namespace compiler {
 namespace rust {
 
-bool IsNotLegalEvenWithRPoundPrefix(absl::string_view str) {
+bool IsLegalRawIdentifierName(absl::string_view str_without_r_prefix) {
   // These keywords cannot be used even with an r# prefix.
   // https://doc.rust-lang.org/reference/identifiers.html
-  static const auto* rust_raw_identifiers =
+  static const auto* illegal_raw_identifiers =
       new absl::flat_hash_set<std::string>{"crate", "self", "super", "Self"};
-  return rust_raw_identifiers->contains(str);
+  return !illegal_raw_identifiers->contains(str_without_r_prefix);
 }
 
 bool IsRustKeyword(absl::string_view str) {

src/google/protobuf/compiler/rust/rust_keywords.h

@@ -15,13 +15,14 @@ namespace protobuf {
 namespace compiler {
 namespace rust {
 
-// Returns true if the provided str is a 'Raw Identifier', which is a symbol
-// which cannot be used even with r# prefix.
-bool IsNotLegalEvenWithRPoundPrefix(absl::string_view str);
+// Returns true if the provided name is legal to use as a raw identifier name
+// by prefixing with r#
+// https://doc.rust-lang.org/reference/identifiers.html#raw-identifiers
+bool IsLegalRawIdentifierName(absl::string_view str_without_r_prefix);
 
 // Returns true if the provided str is a Rust 2021 Edition keyword and cannot be
-// used as a symbol. These symbols can can be used with an r# prefix unless
-// IsNotLegalEvenWithRPoundPrefix is true. This function should always match the
+// used as an identifier. These symbols can be used with an r# prefix unless
+// IsLegalRawIdentifierName returns false. This function should always match the
 // behavior for the corresponding Edition that our emitted crates use.
 bool IsRustKeyword(absl::string_view str);