// Copyright (c) 2007, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// ---
// Author: Craig Silverstein
//
// When we expand a template, we expand into an abstract "emitter".
// This is typically a string, but could be a file-wrapper, or any
// other data structure that supports this very simple "append" API.
#ifndef TEMPLATE_TEMPLATE_EMITTER_H__
#define TEMPLATE_TEMPLATE_EMITTER_H__
#include <sys/types.h> // for size_t
#include <string>
// NOTE: if you are statically linking the template library into your binary
// (rather than using the template .dll), set '/D CTEMPLATE_DLL_DECL='
// as a compiler flag in your project file to turn off the dllimports.
#ifndef CTEMPLATE_DLL_DECL
# define CTEMPLATE_DLL_DECL __declspec(dllimport)
#endif
namespace google {
class CTEMPLATE_DLL_DECL ExpandEmitter {
public:
ExpandEmitter() {}
virtual ~ExpandEmitter() {}
virtual void Emit(char c) = 0;
virtual void Emit(const std::string& s) = 0;
virtual void Emit(const char* s) = 0;
virtual void Emit(const char* s, size_t slen) = 0;
};
class CTEMPLATE_DLL_DECL StringEmitter : public ExpandEmitter {
std::string* const outbuf_;
public:
StringEmitter(std::string* outbuf) : outbuf_(outbuf) {}
virtual void Emit(char c) { *outbuf_ += c; }
virtual void Emit(const std::string& s) { *outbuf_ += s; }
virtual void Emit(const char* s) { *outbuf_ += s; }
virtual void Emit(const char* s, size_t slen) { outbuf_->append(s, slen); }
};
}
#endif // TEMPLATE_TEMPLATE_EMITTER_H__