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//===-- 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 LLVM_TOOLS_CLANG_TOOLS_EXTRA_CPP11_MIGRATE_VARIABLE_NAMING_H
#define LLVM_TOOLS_CLANG_TOOLS_EXTRA_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 // LLVM_TOOLS_CLANG_TOOLS_EXTRA_CPP11_MIGRATE_VARIABLE_NAMING_H
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