[clang] [clang][ExtractAPI] Add support for blocks in declaration fragments (PR #73369)

[Erick Velez via cfe-commits]

================
@@ -24,6 +26,40 @@
 using namespace clang::extractapi;
 using namespace llvm;
 
+namespace {
+
+void findTypeLocForBlockDecl(const clang::TypeSourceInfo *TSInfo,
+                             clang::FunctionTypeLoc &Block,
+                             clang::FunctionProtoTypeLoc &BlockProto) {
+  if (!TSInfo)
+    return;
+
+  clang::TypeLoc TL = TSInfo->getTypeLoc().getUnqualifiedLoc();
+  while (true) {
+    // Look through qualified types
+    if (auto QualifiedTL = TL.getAs<clang::QualifiedTypeLoc>()) {
+      TL = QualifiedTL.getUnqualifiedLoc();
+      continue;
+    }
+
+    if (auto AttrTL = TL.getAs<clang::AttributedTypeLoc>()) {
+      TL = AttrTL.getModifiedLoc();
+      continue;
+    }
+
+    // Try to get the function prototype behind the block pointer type,
+    // then we're done.
+    if (auto BlockPtr = TL.getAs<clang::BlockPointerTypeLoc>()) {
+      TL = BlockPtr.getPointeeLoc().IgnoreParens();
+      Block = TL.getAs<clang::FunctionTypeLoc>();
+      BlockProto = TL.getAs<clang::FunctionProtoTypeLoc>();
+    }
+    break;
----------------
evelez7 wrote:

Wouldn't this while just break on the first iteration?

https://github.com/llvm/llvm-project/pull/73369