4cf99cfdc7
A new Clang-based tool which converts for loops to use the range-based syntax new to C++11. Three kinds of loops can be converted: - Loops over statically allocated arrays - Loops over containers, using iterators - Loops over array-like containers, using operator[] and at() Each transformation is assigned a confidence level by the tool. The minimum require confidence level to actually apply the transformation can be specified on the command line, but the default level should be fine for most code. Like other tools based on RefactoringTool, it is easiest to use this tool with a compilation database. llvm-svn: 162627
60 lines
2.3 KiB
C++
60 lines
2.3 KiB
C++
//===-- loop-convert/VariableNaming.h - Gererate variable names -*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains the declaration of the VariableNamer class, which is
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// responsible for generating new variable names and ensuring that they do not
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// conflict with existing ones.
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LLVM_TOOLS_CLANG_TOOLS_EXTRA_LOOP_VARIABLE_NAMING_H_
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#define _LLVM_TOOLS_CLANG_TOOLS_EXTRA_LOOP_VARIABLE_NAMING_H_
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#include "StmtAncestor.h"
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#include "clang/AST/ASTContext.h"
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namespace clang {
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namespace loop_migrate {
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/// \brief Create names for generated variables within a particular statement.
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///
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/// VariableNamer uses a DeclContext as a reference point, checking for any
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/// conflicting declarations higher up in the context or within SourceStmt.
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/// It creates a variable name using hints from a source container and the old
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/// index, if they exist.
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class VariableNamer {
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public:
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VariableNamer(StmtGeneratedVarNameMap *GeneratedDecls,
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const StmtParentMap *ReverseAST, const Stmt *SourceStmt,
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const VarDecl *OldIndex, const VarDecl *TheContainer) :
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GeneratedDecls(GeneratedDecls), ReverseAST(ReverseAST),
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SourceStmt(SourceStmt), OldIndex(OldIndex), TheContainer(TheContainer) { }
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/// \brief Generate a new index name.
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///
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/// Generates the name to be used for an inserted iterator. It relies on
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/// declarationExists() to determine that there are no naming conflicts, and
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/// tries to use some hints from the container name and the old index name.
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std::string createIndexName();
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private:
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StmtGeneratedVarNameMap *GeneratedDecls;
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const StmtParentMap *ReverseAST;
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const Stmt *SourceStmt;
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const VarDecl *OldIndex;
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const VarDecl *TheContainer;
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// Determine whether or not a declaration that would conflict with Symbol
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// exists in an outer context or in any statement contained in SourceStmt.
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bool declarationExists(const StringRef Symbol);
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};
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} // namespace loop_migrate
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} // namespace clang
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#endif // _LLVM_TOOLS_CLANG_TOOLS_EXTRA_LOOP_VARIABLE_NAMING_H_
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