[PATCH] D22069: clang-tidy modernize-loop-convert: preserve type of alias declaration (bug 28341)

[Matthias Gehre via cfe-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL276111: clang-tidy modernize-loop-convert: preserve type of alias declaration (bug… (authored by mgehre).

Changed prior to commit:
  https://reviews.llvm.org/D22069?vs=63400&id=64672#toc

Repository:
  rL LLVM

https://reviews.llvm.org/D22069

Files:
  clang-tools-extra/trunk/clang-tidy/modernize/LoopConvertCheck.cpp
  clang-tools-extra/trunk/test/clang-tidy/modernize-loop-convert-extra.cpp

Index: clang-tools-extra/trunk/clang-tidy/modernize/LoopConvertCheck.cpp
===================================================================
--- clang-tools-extra/trunk/clang-tidy/modernize/LoopConvertCheck.cpp
+++ clang-tools-extra/trunk/clang-tidy/modernize/LoopConvertCheck.cpp
@@ -517,7 +517,17 @@
   if (VarNameFromAlias) {
     const auto *AliasVar = cast<VarDecl>(AliasDecl->getSingleDecl());
     VarName = AliasVar->getName().str();
-    AliasVarIsRef = AliasVar->getType()->isReferenceType();
+
+    // Use the type of the alias if it's not the same
+    QualType AliasVarType = AliasVar->getType();
+    assert(!AliasVarType.isNull() && "Type in VarDecl is null");
+    if (AliasVarType->isReferenceType()) {
+      AliasVarType = AliasVarType.getNonReferenceType();
+      AliasVarIsRef = true;
+    }
+    if (Descriptor.ElemType.isNull() ||
+        !Context->hasSameUnqualifiedType(AliasVarType, Descriptor.ElemType))
+      Descriptor.ElemType = AliasVarType;
 
     // We keep along the entire DeclStmt to keep the correct range here.
     SourceRange ReplaceRange = AliasDecl->getSourceRange();
Index: clang-tools-extra/trunk/test/clang-tidy/modernize-loop-convert-extra.cpp
===================================================================
--- clang-tools-extra/trunk/test/clang-tidy/modernize-loop-convert-extra.cpp
+++ clang-tools-extra/trunk/test/clang-tidy/modernize-loop-convert-extra.cpp
@@ -1060,3 +1060,15 @@
 }
 
 } // namespace InitLists
+
+void bug28341() {
+  char v[5];
+  for(int i = 0; i < 5; ++i) {
+      unsigned char value = v[i];
+      if (value > 127)
+        ;
+  // CHECK-MESSAGES: :[[@LINE-4]]:3: warning: use range-based for loop instead
+  // CHECK-FIXES: for(unsigned char value : v)
+  // CHECK-FIXES-NEXT: if (value > 127)
+  }
+}


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