grive2/libgrive/src/json/ValBuilder.hh

75 lines
1.6 KiB
C++

/*
grive: an GPL program to sync a local directory with Google Drive
Copyright (C) 2013 Wan Wai Ho
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation version 2
of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA.
*/
#pragma once
#include "ValVisitor.hh"
#include "Val.hh"
#include "util/Exception.hh"
#include <stack>
#include <memory>
namespace gr {
class ValBuilder : public ValVisitor
{
public :
struct Error : virtual Exception {} ;
typedef boost::error_info<struct Mismatch, Val> Mismatch_ ;
typedef boost::error_info<struct Unexpected, Val> Unexpected_ ;
typedef boost::error_info<struct NoKey, Val> NoKey_ ;
public :
ValBuilder( ) ;
~ValBuilder() ;
void Visit( long long t ) ;
void Visit( double t ) ;
void Visit( const std::string& t ) ;
void Visit( bool t ) ;
void VisitNull() ;
void Build( const Val& t ) ;
void StartArray() ;
void EndArray() ;
void StartObject() ;
void VisitKey( const std::string& t ) ;
void EndObject() ;
Val Result() const ;
private :
void End( Val::TypeEnum type ) ;
private :
struct Level
{
Val key ;
Val val ;
} ;
std::stack<Level> m_ctx ;
} ;
} // end of namespace