// Copyright 2022 The Abseil Authors

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//     https://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

#ifndef ABSL_STRINGS_INTERNAL_STRINGIFY_SINK_H_

#define ABSL_STRINGS_INTERNAL_STRINGIFY_SINK_H_

#include <string>

#include <type_traits>

#include <utility>

#include "absl/strings/string_view.h"

namespace absl {

ABSL_NAMESPACE_BEGIN

namespace strings_internal {

class StringifySink {

 public:

  void Append(size_t count, char ch);

  void Append(string_view v);

  // Support `absl::Format(&sink, format, args...)`.

  friend void AbslFormatFlush(StringifySink* sink, absl::string_view v) {

    sink->Append(v);

  }

 private:

  template <typename T>

  friend string_view ExtractStringification(StringifySink& sink, const T& v);

  std::string buffer_;

};

template <typename T>

string_view ExtractStringification(StringifySink& sink, const T& v) {

  AbslStringify(sink, v);

  return sink.buffer_;

}

}  // namespace strings_internal

ABSL_NAMESPACE_END

}  // namespace absl

#endif  // ABSL_STRINGS_INTERNAL_STRINGIFY_SINK_H_