diff options
Diffstat (limited to 'third_party/abseil_cpp/absl/strings/internal/ostringstream.h')
-rw-r--r-- | third_party/abseil_cpp/absl/strings/internal/ostringstream.h | 89 |
1 files changed, 0 insertions, 89 deletions
diff --git a/third_party/abseil_cpp/absl/strings/internal/ostringstream.h b/third_party/abseil_cpp/absl/strings/internal/ostringstream.h deleted file mode 100644 index d25d60473f6d..000000000000 --- a/third_party/abseil_cpp/absl/strings/internal/ostringstream.h +++ /dev/null @@ -1,89 +0,0 @@ -// Copyright 2017 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_OSTRINGSTREAM_H_ -#define ABSL_STRINGS_INTERNAL_OSTRINGSTREAM_H_ - -#include <cassert> -#include <ostream> -#include <streambuf> -#include <string> - -#include "absl/base/port.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace strings_internal { - -// The same as std::ostringstream but appends to a user-specified std::string, -// and is faster. It is ~70% faster to create, ~50% faster to write to, and -// completely free to extract the result std::string. -// -// std::string s; -// OStringStream strm(&s); -// strm << 42 << ' ' << 3.14; // appends to `s` -// -// The stream object doesn't have to be named. Starting from C++11 operator<< -// works with rvalues of std::ostream. -// -// std::string s; -// OStringStream(&s) << 42 << ' ' << 3.14; // appends to `s` -// -// OStringStream is faster to create than std::ostringstream but it's still -// relatively slow. Avoid creating multiple streams where a single stream will -// do. -// -// Creates unnecessary instances of OStringStream: slow. -// -// std::string s; -// OStringStream(&s) << 42; -// OStringStream(&s) << ' '; -// OStringStream(&s) << 3.14; -// -// Creates a single instance of OStringStream and reuses it: fast. -// -// std::string s; -// OStringStream strm(&s); -// strm << 42; -// strm << ' '; -// strm << 3.14; -// -// Note: flush() has no effect. No reason to call it. -class OStringStream : private std::basic_streambuf<char>, public std::ostream { - public: - // The argument can be null, in which case you'll need to call str(p) with a - // non-null argument before you can write to the stream. - // - // The destructor of OStringStream doesn't use the std::string. It's OK to - // destroy the std::string before the stream. - explicit OStringStream(std::string* s) : std::ostream(this), s_(s) {} - - std::string* str() { return s_; } - const std::string* str() const { return s_; } - void str(std::string* s) { s_ = s; } - - private: - using Buf = std::basic_streambuf<char>; - - Buf::int_type overflow(int c) override; - std::streamsize xsputn(const char* s, std::streamsize n) override; - - std::string* s_; -}; - -} // namespace strings_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_STRINGS_INTERNAL_OSTRINGSTREAM_H_ |