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Annotation of parser3/src/types/pa_vobject.h, revision 1.31

1.6       paf         1: /**    @file
1.7       paf         2:        Parser: @b object class decl.
                      3: 
1.15      paf         4:        Copyright (c) 2001, 2002 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: 
1.31    ! paf        11: static const char* IDENT_VOBJECT_H="$Date: 2002/08/13 15:55:44 $";
1.19      paf        12: 
1.1       paf        13: #include "pa_vjunction.h"
                     14: #include "pa_vclass.h"
1.4       paf        15: #include "pa_vstateless_object.h"
1.6       paf        16: 
1.23      paf        17: // defines
                     18: 
                     19: #define CLASS_NAME "CLASS"
                     20: #define BASE_NAME "BASE"
                     21: 
1.26      paf        22: /**    parser class instance, stores 
                     23:        - class VObject::fclass;
                     24:        - fields VObject::ffields (dynamic, not static, which are stored in class).
                     25:        - links to base/derived instances [VObject::fbase, VObject::fderived]
1.6       paf        26: */
1.24      paf        27: class VObject: public VStateless_object {
1.1       paf        28: public: // Value
                     29:        
1.24      paf        30:        const char *type() const { return fclass.name_cstr(); }
1.31    ! paf        31:        /*override*/ bool is(const char *atype, bool looking_up) const;
1.12      parser     32: 
1.25      paf        33:        /// VObject: fclass
                     34:        VStateless_class *get_class() { return &fclass; }
                     35:        /// VObject: fbase
                     36:        /*override*/ Value *base_object() { return fbase; }
1.29      paf        37:        Value *as_expr_result(bool);
                     38:        bool as_bool() const;
1.31    ! paf        39:        /*override*/ Value *get_element(const String& aname, Value *aself, bool /*looking_up*/);
1.29      paf        40:        /*override*/ bool put_element(const String& aname, Value *avalue, bool replace);
1.1       paf        41: 
1.24      paf        42:        /// VObject: remember derived [the only client] */
1.26      paf        43:        /*override*/ VObject *set_derived(VObject *aderived) { 
                     44:                VObject *result=fderived;
1.25      paf        45:                fderived=aderived;
                     46:                return fderived;
1.24      paf        47:        }
                     48: 
1.1       paf        49: public: // creation
                     50: 
1.24      paf        51:        VObject(Pool& apool, VStateless_class& aclass) : VStateless_object(apool), 
                     52:                fclass(aclass),
                     53:                ffields(apool),
                     54:                fderived(0),
1.25      paf        55:                fbase(fclass.base_class()?fclass.base_class()->create_new_value(apool):0) {
1.24      paf        56:                if(fbase)
1.25      paf        57:                        fbase->set_derived(this);
1.1       paf        58:        }
                     59: 
                     60: private:
                     61: 
1.26      paf        62:        Value *get_last_derived() {
                     63:                return fderived?fderived->get_last_derived():this;
1.31    ! paf        64:        }
        !            65: 
        !            66:        const Value *get_last_derived_const() const {
        !            67:                return fderived?fderived->get_last_derived_const():this;
1.26      paf        68:        }
                     69: 
                     70: private:
                     71: 
1.24      paf        72:        VStateless_class& fclass;
1.1       paf        73:        Hash ffields;
1.26      paf        74:        VObject *fderived;
1.24      paf        75:        Value *fbase;
1.25      paf        76: };
                     77: 
                     78: class Temp_derived {
                     79:        Value& fvalue;
1.26      paf        80:        VObject *fsaved_derived;
1.25      paf        81: public:
1.26      paf        82:        Temp_derived(Value& avalue, VObject *aderived) : 
1.25      paf        83:                fvalue(avalue),
                     84:                fsaved_derived(avalue.set_derived(aderived)) {}
                     85:        ~Temp_derived() { fvalue.set_derived(fsaved_derived); }
1.1       paf        86: };
                     87: 
                     88: #endif