[clang-tools-extra] [clang-tidy] Improve `bugprone-capturing-this-in-member-variable` check: add support of `bind` functions. (PR #132635)

[Baranov Victor via cfe-commits]

================
@@ -87,33 +94,54 @@ void CapturingThisInMemberVariableCheck::registerMatchers(MatchFinder *Finder) {
       // [self = this]
       capturesVar(varDecl(hasInitializer(cxxThisExpr())))));
   auto IsLambdaCapturingThis =
-      lambdaExpr(hasAnyCapture(CaptureThis.bind("capture"))).bind("lambda");
-  auto IsInitWithLambda =
-      anyOf(IsLambdaCapturingThis,
-            cxxConstructExpr(hasArgument(0, IsLambdaCapturingThis)));
+      lambdaExpr(hasAnyCapture(CaptureThis)).bind("lambda");
+
+  auto IsBindCapturingThis =
+      callExpr(
+          callee(functionDecl(matchers::matchesAnyListedName(BindFunctions))
+                     .bind("callee")),
+          hasAnyArgument(cxxThisExpr()))
+          .bind("bind");
+
+  auto IsInitWithLambdaOrBind =
+      anyOf(IsLambdaCapturingThis, IsBindCapturingThis,
+            cxxConstructExpr(hasArgument(
+                0, anyOf(IsLambdaCapturingThis, IsBindCapturingThis))));
+
   Finder->addMatcher(
       cxxRecordDecl(
           anyOf(has(cxxConstructorDecl(
                     unless(isCopyConstructor()), unless(isMoveConstructor()),
                     hasAnyConstructorInitializer(cxxCtorInitializer(
                         isMemberInitializer(), forField(IsStdFunctionField),
-                        withInitializer(IsInitWithLambda))))),
+                        withInitializer(IsInitWithLambdaOrBind))))),
                 has(fieldDecl(IsStdFunctionField,
-                              hasInClassInitializer(IsInitWithLambda)))),
+                              hasInClassInitializer(IsInitWithLambdaOrBind)))),
           unless(correctHandleCaptureThisLambda())),
       this);
 }
-
 void CapturingThisInMemberVariableCheck::check(
     const MatchFinder::MatchResult &Result) {
-  const auto *Capture = Result.Nodes.getNodeAs<LambdaCapture>("capture");
-  const auto *Lambda = Result.Nodes.getNodeAs<LambdaExpr>("lambda");
+  const auto EmitDiag = [this](const SourceLocation &Location,
+                               const FunctionDecl *Bind) {
+    const std::string BindName = Bind ? Bind->getQualifiedNameAsString() : "";
+    diag(Location, "'this' captured by a %select{lambda|'%1' call}0 and "
+                   "stored in a class member variable; disable implicit class "
+                   "copying/moving to prevent potential use-after-free")
+        << (Bind ? 1 : 0) << BindName;
+  };
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vbvictor wrote:

Now it may be clearer since we have only two `if`-s

https://github.com/llvm/llvm-project/pull/132635