1 files changed, 59 insertions, 0 deletions
diff --git a/clang-tools-extra/clang-modernize/LoopConvert/VariableNaming.h b/clang-tools-extra/clang-modernize/LoopConvert/VariableNaming.h
new file mode 100644
index 00000000000..066ed1e5af4
--- /dev/null
+++ b/clang-tools-extra/clang-modernize/LoopConvert/VariableNaming.h
@@ -0,0 +1,59 @@
+//===-- LoopConvert/VariableNaming.h - Gererate variable names --*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief This file contains the declaration of the VariableNamer class, which
+/// is responsible for generating new variable names and ensuring that they do
+/// not conflict with existing ones.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef CPP11_MIGRATE_VARIABLE_NAMING_H
+#define CPP11_MIGRATE_VARIABLE_NAMING_H
+
+#include "StmtAncestor.h"
+#include "clang/AST/ASTContext.h"
+
+/// \brief Create names for generated variables within a particular statement.
+///
+/// VariableNamer uses a DeclContext as a reference point, checking for any
+/// conflicting declarations higher up in the context or within SourceStmt.
+/// It creates a variable name using hints from a source container and the old
+/// index, if they exist.
+class VariableNamer {
+ public:
+  VariableNamer(
+      StmtGeneratedVarNameMap *GeneratedDecls, const StmtParentMap *ReverseAST,
+      const clang::Stmt *SourceStmt, const clang::VarDecl *OldIndex,
+      const clang::VarDecl *TheContainer, const clang::ASTContext *Context)
+      : GeneratedDecls(GeneratedDecls), ReverseAST(ReverseAST),
+        SourceStmt(SourceStmt), OldIndex(OldIndex), TheContainer(TheContainer),
+        Context(Context) {}
+
+  /// \brief Generate a new index name.
+  ///
+  /// Generates the name to be used for an inserted iterator. It relies on
+  /// declarationExists() to determine that there are no naming conflicts, and
+  /// tries to use some hints from the container name and the old index name.
+  std::string createIndexName();
+
+ private:
+  StmtGeneratedVarNameMap *GeneratedDecls;
+  const StmtParentMap *ReverseAST;
+  const clang::Stmt *SourceStmt;
+  const clang::VarDecl *OldIndex;
+  const clang::VarDecl *TheContainer;
+  const clang::ASTContext *Context;
+
+  // Determine whether or not a declaration that would conflict with Symbol
+  // exists in an outer context or in any statement contained in SourceStmt.
+  bool declarationExists(llvm::StringRef Symbol);
+};
+
+#endif // CPP11_MIGRATE_VARIABLE_NAMING_H