[PATCH] D80623: WIP: Add an API to simplify setting TraversalKind in clang-tidy matchers

[Stephen Kelly via Phabricator via cfe-commits]

This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rG538677abbde4: Add an API to simplify setting TraversalKind in clang-tidy matchers (authored by stephenkelly).

Changed prior to commit:
  https://reviews.llvm.org/D80623?vs=313386&id=321729#toc

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D80623/new/

https://reviews.llvm.org/D80623

Files:
  clang/include/clang/ASTMatchers/ASTMatchFinder.h
  clang/lib/ASTMatchers/ASTMatchFinder.cpp


Index: clang/lib/ASTMatchers/ASTMatchFinder.cpp
===================================================================
--- clang/lib/ASTMatchers/ASTMatchFinder.cpp
+++ clang/lib/ASTMatchers/ASTMatchFinder.cpp
@@ -1036,6 +1036,7 @@
         Callback(Callback) {}
 
     void visitMatch(const BoundNodes& BoundNodesView) override {
+      TraversalKindScope RAII(*Context, Callback->getCheckTraversalKind());
       Callback->run(MatchFinder::MatchResult(BoundNodesView, Context));
     }
 
@@ -1335,7 +1336,10 @@
 
 void MatchFinder::addMatcher(const DeclarationMatcher &NodeMatch,
                              MatchCallback *Action) {
-  Matchers.DeclOrStmt.emplace_back(NodeMatch, Action);
+  if (auto TK = Action->getCheckTraversalKind())
+    Matchers.DeclOrStmt.emplace_back(traverse(*TK, NodeMatch), Action);
+  else
+    Matchers.DeclOrStmt.emplace_back(NodeMatch, Action);
   Matchers.AllCallbacks.insert(Action);
 }
 
@@ -1347,7 +1351,10 @@
 
 void MatchFinder::addMatcher(const StatementMatcher &NodeMatch,
                              MatchCallback *Action) {
-  Matchers.DeclOrStmt.emplace_back(NodeMatch, Action);
+  if (auto TK = Action->getCheckTraversalKind())
+    Matchers.DeclOrStmt.emplace_back(traverse(*TK, NodeMatch), Action);
+  else
+    Matchers.DeclOrStmt.emplace_back(NodeMatch, Action);
   Matchers.AllCallbacks.insert(Action);
 }
 
@@ -1436,5 +1443,10 @@
 
 StringRef MatchFinder::MatchCallback::getID() const { return "<unknown>"; }
 
+llvm::Optional<TraversalKind>
+MatchFinder::MatchCallback::getCheckTraversalKind() const {
+  return llvm::None;
+}
+
 } // end namespace ast_matchers
 } // end namespace clang
Index: clang/include/clang/ASTMatchers/ASTMatchFinder.h
===================================================================
--- clang/include/clang/ASTMatchers/ASTMatchFinder.h
+++ clang/include/clang/ASTMatchers/ASTMatchFinder.h
@@ -110,6 +110,12 @@
     /// This id is used, for example, for the profiling output.
     /// It defaults to "<unknown>".
     virtual StringRef getID() const;
+
+    /// TraversalKind to use while matching and processing
+    /// the result nodes. This API is temporary to facilitate
+    /// third parties porting existing code to the default
+    /// behavior of clang-tidy.
+    virtual llvm::Optional<TraversalKind> getCheckTraversalKind() const;
   };
 
   /// Called when parsing is finished. Intended for testing only.
@@ -280,6 +286,11 @@
   void run(const MatchFinder::MatchResult &Result) override {
     Nodes.push_back(Result.Nodes);
   }
+
+  llvm::Optional<TraversalKind> getCheckTraversalKind() const override {
+    return llvm::None;
+  }
+
   SmallVector<BoundNodes, 1> Nodes;
 };
 }


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