[clang] [clang-format] Keep compound literals stable in macro bodies (PR #173771)

[via cfe-commits]

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@@ -491,6 +491,31 @@ void UnwrappedLineParser::calculateBraceTypes(bool ExpectClassBody) {
   SmallVector<StackEntry, 8> LBraceStack;
   assert(Tok->is(tok::l_brace));
 
+  constexpr int MaxLookBack = 64;
+  const auto IsAddressOfParenExpression = [](const FormatToken *RightParen) {
+    if (!RightParen || RightParen->isNot(tok::r_paren))
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Lane0218 wrote:

Thanks for the feedback! I made the precondition explicit at the call site  (only call the helper when PrevTok is present and tok::r_paren) and replaced the redundant null/kind checks inside the helper with an assert to document the contract. 

https://github.com/llvm/llvm-project/pull/173771