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Annotation of parser3/src/types/pa_vobject.h, revision 1.39

1.6       paf         1: /**    @file
1.7       paf         2:        Parser: @b object class decl.
                      3: 
1.39    ! paf         4:        Copyright (c) 2001-2003 ArtLebedev Group (http://www.artlebedev.com)
1.16      paf         5:        Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.1       paf         6: */
                      7: 
                      8: #ifndef PA_VOBJECT_H
                      9: #define PA_VOBJECT_H
                     10: 
1.39    ! paf        11: static const char* IDENT_VOBJECT_H="$Date: 2003/04/07 12:30:03 $";
        !            12: 
        !            13: // includes
1.19      paf        14: 
1.1       paf        15: #include "pa_vjunction.h"
                     16: #include "pa_vclass.h"
1.4       paf        17: #include "pa_vstateless_object.h"
1.39    ! paf        18: #include "pa_vfile.h"
1.6       paf        19: 
1.23      paf        20: // defines
                     21: 
                     22: #define BASE_NAME "BASE"
                     23: 
1.26      paf        24: /**    parser class instance, stores 
                     25:        - class VObject::fclass;
                     26:        - fields VObject::ffields (dynamic, not static, which are stored in class).
                     27:        - links to base/derived instances [VObject::fbase, VObject::fderived]
1.6       paf        28: */
1.24      paf        29: class VObject: public VStateless_object {
1.39    ! paf        30: 
        !            31:        VStateless_class& fclass;
        !            32:        HashStringValue ffields;
        !            33:        VObject* fderived;
        !            34:        Value* fbase;
        !            35: 
1.1       paf        36: public: // Value
                     37:        
1.39    ! paf        38:        const char* type() const { return fclass.name_cstr(); }
        !            39:        override Value* as(const char* atype, bool looking_up);
1.12      parser     40: 
1.25      paf        41:        /// VObject: fclass
1.39    ! paf        42:        override VStateless_class *get_class() { return &fclass; }
        !            43:        override VStateless_class *get_last_derived_class() { return get_last_derived().get_class(); }
        !            44:        override Value* base() { return fbase; }
        !            45: 
        !            46:        override bool is_defined() const;
        !            47:        override Value& as_expr_result(bool);
        !            48:        override int as_int() const;
        !            49:        override double as_double();
        !            50:        override bool as_bool() const;
        !            51:        override VFile* as_vfile(String::Language lang=String::L_UNSPECIFIED, 
        !            52:                const Request_charsets *charsets=0);
1.33      paf        53:        
1.39    ! paf        54:        override HashStringValue* get_hash();
        !            55:        override Table *get_table();
1.33      paf        56: 
1.39    ! paf        57:        override Value* get_element(const String& aname, Value& aself, bool /*looking_up*/);
        !            58:        override bool put_element(const String& aname, Value* avalue, bool replace);
1.1       paf        59: 
1.37      paf        60:        /// VObject: remember derived [the only client]
1.39    ! paf        61:        override VObject* set_derived(VObject* aderived) { 
        !            62:                VObject* result=fderived;
1.25      paf        63:                fderived=aderived;
1.34      paf        64:                return result;
1.24      paf        65:        }
                     66: 
1.1       paf        67: public: // creation
                     68: 
1.39    ! paf        69:        VObject(VStateless_class& aclass): fclass(aclass), fderived(0) {
        !            70:                if(VStateless_class* base_class=fclass.base_class())
        !            71:                        (fbase=base_class->create_new_value())->set_derived(this);
1.1       paf        72:        }
                     73: 
                     74: private:
                     75: 
1.37      paf        76:        VObject& get_last_derived() {
                     77:                return fderived?fderived->get_last_derived():*this;
1.26      paf        78:        }
1.37      paf        79: 
1.39    ! paf        80:        Value* stateless_object__get_element(const String& aname, Value& aself);
1.25      paf        81: };
                     82: 
                     83: class Temp_derived {
                     84:        Value& fvalue;
1.39    ! paf        85:        VObject* fsaved_derived;
1.25      paf        86: public:
1.39    ! paf        87:        Temp_derived(Value& avalue, VObject* aderived) : 
1.25      paf        88:                fvalue(avalue),
                     89:                fsaved_derived(avalue.set_derived(aderived)) {}
                     90:        ~Temp_derived() { fvalue.set_derived(fsaved_derived); }
1.1       paf        91: };
                     92: 
                     93: #endif