Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

//===- StringMatcher.h - Generate a matcher for input strings ---*- C++ -*-===//

//

// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

// See https://llvm.org/LICENSE.txt for license information.

// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

//

//===----------------------------------------------------------------------===//

//

// This file implements the StringMatcher class.

//

//===----------------------------------------------------------------------===//

#ifndef LLVM_TABLEGEN_STRINGMATCHER_H

#define LLVM_TABLEGEN_STRINGMATCHER_H

#include "llvm/ADT/StringRef.h"

#include <string>

#include <utility>

#include <vector>

namespace llvm {

class raw_ostream;

/// Given a list of strings and code to execute when they match, output a

/// simple switch tree to classify the input string.

///

/// If a match is found, the code in Matches[i].second is executed; control must

/// not exit this code fragment.  If nothing matches, execution falls through.

class StringMatcher {

public:

  using StringPair = std::pair<std::string, std::string>;

private:

  StringRef StrVariableName;

  const std::vector<StringPair> &Matches;

  raw_ostream &OS;

public:

  StringMatcher(StringRef strVariableName,

                const std::vector<StringPair> &matches, raw_ostream &os)

    : StrVariableName(strVariableName), Matches(matches), OS(os) {}

  void Emit(unsigned Indent = 0, bool IgnoreDuplicates = false) const;

private:

  bool EmitStringMatcherForChar(const std::vector<const StringPair *> &Matches,

                                unsigned CharNo, unsigned IndentCount,

                                bool IgnoreDuplicates) const;

};

} // end namespace llvm

#endif // LLVM_TABLEGEN_STRINGMATCHER_H