chromium/url/url_canon_stdstring.h

// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef URL_URL_CANON_STDSTRING_H_
#define URL_URL_CANON_STDSTRING_H_

// This header file defines a canonicalizer output method class for STL
// strings. Because the canonicalizer tries not to be dependent on the STL,
// we have segregated it here.

#include <string>
#include <string_view>

#include "base/compiler_specific.h"
#include "base/component_export.h"
#include "base/memory/raw_ptr_exclusion.h"
#include "url/url_canon.h"

namespace url {

// Write into a std::string given in the constructor. This object does not own
// the string itself, and the user must ensure that the string stays alive
// throughout the lifetime of this object.
//
// The given string will be appended to; any existing data in the string will
// be preserved.
//
// Note that when canonicalization is complete, the string will likely have
// unused space at the end because we make the string very big to start out
// with (by |initial_size|). This ends up being important because resize
// operations are slow, and because the base class needs to write directly
// into the buffer.
//
// Therefore, the user should call Complete() before using the string that
// this class wrote into.
class COMPONENT_EXPORT(URL) StdStringCanonOutput : public CanonOutput {};

// An extension of the Replacements class that allows the setters to use
// string_views (implicitly allowing strings or char*s).
//
// The contents of the string_views are not copied and must remain valid until
// the StringViewReplacements object goes out of scope.
//
// In order to make it harder to misuse the API the setters do not accept rvalue
// references to std::strings.
// Note: Extra const char* overloads are necessary to break ambiguities that
// would otherwise exist for char literals.
template <typename CharT>
class StringViewReplacements : public Replacements<CharT> {};

}  // namespace url

#endif  // URL_URL_CANON_STDSTRING_H_