[clang] [SystemZ][z/OS] Implement #pragma export (PR #141671)

[Erich Keane via cfe-commits]

================
@@ -1386,6 +1402,74 @@ bool Parser::HandlePragmaMSAllocText(StringRef PragmaName,
   return true;
 }
 
+bool Parser::zOSHandlePragmaHelper(tok::TokenKind PragmaKind) {
+  assert(Tok.is(PragmaKind));
+
+  StringRef PragmaName = "export";
+
+  using namespace clang::charinfo;
+  auto *TheTokens =
+      (std::pair<std::unique_ptr<Token[]>, size_t> *)Tok.getAnnotationValue();
+  PP.EnterTokenStream(std::move(TheTokens->first), TheTokens->second, true,
+                      false);
+  ConsumeAnnotationToken();
+
+  do {
+    PP.Lex(Tok);
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erichkeane wrote:

Rather than doing the lex directly, shouldn't we just be calling Parser::ConsumeToken? 

https://github.com/llvm/llvm-project/pull/141671