[PATCH] D26218: [clang-tidy] Ignore notes along with a warning when processing NOLINT

[Nikita Kakuev via cfe-commits]

nkakuev added a reviewer: malcolm.parsons.
nkakuev updated this revision to Diff 76718.
nkakuev added a comment.

Fixed review comments: replaced a static variable with a class member.


https://reviews.llvm.org/D26218

Files:
  clang-tidy/ClangTidyDiagnosticConsumer.cpp
  clang-tidy/ClangTidyDiagnosticConsumer.h
  test/clang-tidy/Inputs/nolint/trigger_warning.h
  test/clang-tidy/nolint.cpp


Index: test/clang-tidy/nolint.cpp
===================================================================
--- test/clang-tidy/nolint.cpp
+++ test/clang-tidy/nolint.cpp
@@ -1,4 +1,5 @@
-// RUN: %check_clang_tidy %s google-explicit-constructor,clang-diagnostic-unused-variable %t -- -extra-arg=-Wunused-variable --
+// RUN: %check_clang_tidy %s google-explicit-constructor,clang-diagnostic-unused-variable,clang-analyzer-core.UndefinedBinaryOperatorResult %t -- -extra-arg=-Wunused-variable -- -I%S/Inputs/nolint
+
 
 class A { A(int i); };
 // CHECK-MESSAGES: :[[@LINE-1]]:11: warning: single-argument constructors must be marked explicit
@@ -27,4 +28,12 @@
 #define DOUBLE_MACRO MACRO(H) // NOLINT
 DOUBLE_MACRO
 
-// CHECK-MESSAGES: Suppressed 7 warnings (7 NOLINT)
+#include "trigger_warning.h"
+void I(int& Out) {
+  int In;
+  A1(In, Out);
+}
+// CHECK-NOT: header.h:{{.*}} warning: The left operand of '>' is a garbage value
+// CHECK-NOT: :[[@LINE-4]]:{{.*}} note
+
+// CHECK-MESSAGES: Suppressed 8 warnings (8 NOLINT)
Index: test/clang-tidy/Inputs/nolint/trigger_warning.h
===================================================================
--- test/clang-tidy/Inputs/nolint/trigger_warning.h
+++ test/clang-tidy/Inputs/nolint/trigger_warning.h
@@ -0,0 +1,5 @@
+void A1(const int &In, int &Out) {
+  if (In > 123) // NOLINT
+    Out = 123;
+}
+
Index: clang-tidy/ClangTidyDiagnosticConsumer.h
===================================================================
--- clang-tidy/ClangTidyDiagnosticConsumer.h
+++ clang-tidy/ClangTidyDiagnosticConsumer.h
@@ -286,6 +286,7 @@
   std::unique_ptr<llvm::Regex> HeaderFilter;
   bool LastErrorRelatesToUserCode;
   bool LastErrorPassesLineFilter;
+  bool LastErrorWasIgnored;
 };
 
 } // end namespace tidy
Index: clang-tidy/ClangTidyDiagnosticConsumer.cpp
===================================================================
--- clang-tidy/ClangTidyDiagnosticConsumer.cpp
+++ clang-tidy/ClangTidyDiagnosticConsumer.cpp
@@ -250,7 +250,7 @@
 
 ClangTidyDiagnosticConsumer::ClangTidyDiagnosticConsumer(ClangTidyContext &Ctx)
     : Context(Ctx), LastErrorRelatesToUserCode(false),
-      LastErrorPassesLineFilter(false) {
+      LastErrorPassesLineFilter(false), LastErrorWasIgnored(false) {
   IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts = new DiagnosticOptions();
   Diags.reset(new DiagnosticsEngine(
       IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs), &*DiagOpts, this,
@@ -309,13 +309,20 @@
 
 void ClangTidyDiagnosticConsumer::HandleDiagnostic(
     DiagnosticsEngine::Level DiagLevel, const Diagnostic &Info) {
+  if (LastErrorWasIgnored && DiagLevel == DiagnosticsEngine::Note)
+    return;
+
   if (Info.getLocation().isValid() &&
       DiagLevel != DiagnosticsEngine::Error &&
       DiagLevel != DiagnosticsEngine::Fatal &&
       LineIsMarkedWithNOLINTinMacro(Diags->getSourceManager(), Info.getLocation())) {
     ++Context.Stats.ErrorsIgnoredNOLINT;
+    // Ignored a warning, should ignore related notes as well
+    LastErrorWasIgnored = true;
     return;
   }
+
+  LastErrorWasIgnored = false;
   // Count warnings/errors.
   DiagnosticConsumer::HandleDiagnostic(DiagLevel, Info);
 


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