================
@@ -6107,6 +6109,43 @@ static bool isFromSystemHeader(SourceManager &SM, const
Decl *D) {
SM.isInSystemMacro(D->getLocation());
}
+constexpr unsigned countCPlusPlusKeywords() {
+ unsigned Ret = 0;
+#define MODULES_KEYWORD(NAME)
+#define KEYWORD(NAME, FLAGS) ++Ret;
+#define CXX_KEYWORD_OPERATOR(NAME, TOK) ++Ret;
+#include "clang/Basic/TokenKinds.def"
+ return Ret;
+}
+
+static bool isKeywordInCPlusPlus(const Sema &S, const IdentifierInfo *II) {
+ if (!II)
+ return false;
+
+ // Build a static map of identifiers for all of the keywords in C++ that are
+ // not keywords in C. This allows us to do pointer comparisons instead of
+ // string comparisons when deciding whether the given identifier is a keyword
+ // or not. Note, this treats all keywords as being enabled, regardless of the
+ // setting of other language options. It intentionally disables the modules
+ // keywords because those are conditional keywords, so may be safe to use.
+ static std::array<uintptr_t, countCPlusPlusKeywords()> Keywords = {};
+ if (!Keywords[0]) {
+ unsigned Idx = 0;
+#define MODULES_KEYWORD(NAME)
+#define KEYWORD(NAME, FLAGS)
\
+ Keywords[Idx++] = reinterpret_cast<uint64_t>(
\
+ &S.getPreprocessor().getIdentifierTable().get(#NAME));
+#define CXX_KEYWORD_OPERATOR(NAME, TOK)
\
+ Keywords[Idx++] = reinterpret_cast<uint64_t>(
\
+ &S.getPreprocessor().getIdentifierTable().get(#NAME));
+#include "clang/Basic/TokenKinds.def"
+ assert(Idx == Keywords.size() && "expected to fill every member!");
+ llvm::sort(Keywords);
----------------
AaronBallman wrote:
Oh wait, this isn't really about thread safety in terms of race conditions.
It's about being able to initialize clang as a library from multiple threads?
https://github.com/llvm/llvm-project/pull/137234
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