[PATCH] D129420: [clang-tidy] Initialize boolean variables with 'false' in cppcoreguidelines-init-variables' fix-it

[Danny Mösch via Phabricator via cfe-commits]

SimplyDanny created this revision.
SimplyDanny added a reviewer: aaron.ballman.
Herald added subscribers: carlosgalvezp, shchenz, kbarton, xazax.hun, nemanjai.
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SimplyDanny requested review of this revision.
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In case of a variable with a built-in boolean type, `false` is a better fit to 
default-initialize it.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D129420

Files:
  clang-tools-extra/clang-tidy/cppcoreguidelines/InitVariablesCheck.cpp
  
clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines/init-variables.cpp


Index: 
clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines/init-variables.cpp
===================================================================
--- 
clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines/init-variables.cpp
+++ 
clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines/init-variables.cpp
@@ -64,7 +64,7 @@
 
   bool b;
   // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: variable 'b' is not initialized 
[cppcoreguidelines-init-variables]
-  // CHECK-FIXES: {{^}}  bool b = 0;{{$}}
+  // CHECK-FIXES: {{^}}  bool b = false;{{$}}
   bool bval = true;
 
   const char *ptr;
Index: clang-tools-extra/clang-tidy/cppcoreguidelines/InitVariablesCheck.cpp
===================================================================
--- clang-tools-extra/clang-tidy/cppcoreguidelines/InitVariablesCheck.cpp
+++ clang-tools-extra/clang-tidy/cppcoreguidelines/InitVariablesCheck.cpp
@@ -84,6 +84,8 @@
 
   if (TypePtr->isEnumeralType())
     InitializationString = nullptr;
+  else if (TypePtr->isBooleanType())
+    InitializationString = " = false";
   else if (TypePtr->isIntegerType())
     InitializationString = " = 0";
   else if (TypePtr->isFloatingType()) {



Index: clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines/init-variables.cpp
===================================================================
--- clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines/init-variables.cpp
+++ clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines/init-variables.cpp
@@ -64,7 +64,7 @@
 
   bool b;
   // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: variable 'b' is not initialized [cppcoreguidelines-init-variables]
-  // CHECK-FIXES: {{^}}  bool b = 0;{{$}}
+  // CHECK-FIXES: {{^}}  bool b = false;{{$}}
   bool bval = true;
 
   const char *ptr;
Index: clang-tools-extra/clang-tidy/cppcoreguidelines/InitVariablesCheck.cpp
===================================================================
--- clang-tools-extra/clang-tidy/cppcoreguidelines/InitVariablesCheck.cpp
+++ clang-tools-extra/clang-tidy/cppcoreguidelines/InitVariablesCheck.cpp
@@ -84,6 +84,8 @@
 
   if (TypePtr->isEnumeralType())
     InitializationString = nullptr;
+  else if (TypePtr->isBooleanType())
+    InitializationString = " = false";
   else if (TypePtr->isIntegerType())
     InitializationString = " = 0";
   else if (TypePtr->isFloatingType()) {

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