function_action.h

00001 /*************************************************************************
00002  *              ESLA: Embeddable Scripting LAnguage
00003  *                  Copyright (C) 2003 Frantz Maerten
00004  *
00005  *   This  program  is  free  software;  you  can  redistribute it and/or
00006  *   modify  it  under  the  terms  of  the GNU General Public License as
00007  *   published  by  the Free Software Foundation; either version 2 of the
00008  *   License, or (at your option) any later version.
00009  *
00010  *   If  you modify this software, you should contact the author, include
00011  *   a  notice giving the name of the person performing the modification,
00012  *   the date of modification, and the reason for such modification.
00013  *
00014  *   Note   that   the   GNU  General  Public  License  does  not  permit
00015  *   incorporating the Software into proprietary programs.
00016  *
00017  *  Contact: Frantz Maerten
00018  *     frantz@pangea.stanford.edu
00019  *
00020  *     Dept. of Geological & Environmental Sciences
00021  *     Stanford University 
00022  *     Stanford, CA 94305-2115
00023  *     USA
00024  *************************************************************************/
00025 
00026 
00027 #ifndef FUNCTION_ACTION
00028 #define FUNCTION_ACTION
00029 
00030 #include "../esla_namespace.h"
00031 #include "common.h"
00032 #include "gen_action.h"
00033 #include "local_string_var_registry.h"
00034 #include "local_fct_registry.h"
00035 #include <string>
00036 
00037 BEGIN_LIB_NAMESPACE 
00038 
00039 class FunctionAction: public GenAction {
00040 public:
00041   virtual RET_TYPE set_parameters(IfStream*, const std::string& params) ;
00042   virtual RET_TYPE execute(const std::string&, std::string&) ;
00043   virtual RET_TYPE execute() ;
00044 
00045   virtual std::string args() const ;
00046   virtual std::string command_name() const ;
00047 
00048   virtual bool has_return() const ;
00049   virtual RET_TYPE get_return(std::string&) const ;
00050 
00051   std::string syntax() const ;
00052 
00053 protected:
00054   virtual bool bind(const std::string& expression) ;
00055   virtual bool rebind(const std::string& name, const std::string& new_value) ;
00056   virtual std::string resolve(const std::string& name) ;
00057   virtual bool parse(const std::string& expr, std::string& res) ;
00058 
00059 private:
00060   RET_TYPE decode(const std::string&) ;
00061   LocalStringVarRegistry var_registry_ ;
00062   std::string name_ ;
00063   Tokens vars_ ;
00064   ListActions list_ ;
00065   std::string tmp_ ;
00066   std::string var_return_ ;
00067   bool has_return_ ;
00068 } ;
00069 inline bool FunctionAction::has_return() const {
00070   return has_return_ ;
00071 }
00072 
00073 //----------------------------------
00074 DECLARE_SMART_OBJECT(FunctionAction) ;
00075 //----------------------------------
00076 
00077 END_LIB_NAMESPACE
00078 
00079 #endif