Annotation of parser3/src/include/pa_vclass.h, revision 1.23
1.1 paf 1: /*
1.23 ! paf 2: $Id: pa_vclass.h,v 1.22 2001/03/07 13:55:45 paf Exp $
1.1 paf 3: */
4:
5: #ifndef PA_VCLASS_H
6: #define PA_VCLASS_H
7:
1.19 paf 8: #include "pa_valiased.h"
1.6 paf 9: #include "pa_vhash.h"
1.13 paf 10: #include "pa_vstring.h"
1.8 paf 11: #include "pa_vjunction.h"
1.1 paf 12:
1.17 paf 13: #define CLASS_NAME "CLASS"
14: #define BASE_NAME "BASE"
15:
1.19 paf 16: class VClass : public VAliased {
1.1 paf 17: public: // Value
18:
19: // all: for error reporting after fail(), etc
1.20 paf 20: const char *type() const { return "class"; }
1.1 paf 21:
1.23 ! paf 22: // clone
! 23: Value *clone() const { return NEW VClass(pool(), fbase, ffields, fmethods); };
! 24:
1.1 paf 25: // object_class: (field)=STATIC.value;(STATIC)=hash;(method)=method_ref with self=object_class
1.22 paf 26: Value *get_element(const String& aname) {
1.17 paf 27: // $NAME=my name
1.15 paf 28: if(aname==NAME_NAME)
1.23 ! paf 29: return NEW VString(fclass_alias->name());
1.17 paf 30: // $CLASS=my class=myself
31: if(aname==CLASS_NAME)
1.23 ! paf 32: return fclass_alias;
1.17 paf 33: // $BASE=my parent
34: if(aname==BASE_NAME)
1.23 ! paf 35: return fclass_alias->base();
1.19 paf 36: // $method=junction(self+class+method)
37: if(Junction *junction=get_junction(*this, aname))
38: return NEW VJunction(*junction);
1.17 paf 39: // $field=static field
40: return get_field(aname);
1.1 paf 41: }
42:
43: // object_class, operator_class: (field)=value - static values only
1.4 paf 44: void put_element(const String& name, Value *value) {
1.17 paf 45: set_field(name, value);
1.1 paf 46: }
47:
48: // object_class, object_instance: object_class
1.17 paf 49: VClass *get_class() { return this; }
1.1 paf 50:
51: public: // usage
52:
1.19 paf 53: VClass(Pool& apool) : VAliased(apool, *this),
1.23 ! paf 54: fbase(0),
! 55: ffields(*new(apool) Hash(apool)),
! 56: fmethods(*new(apool) Hash(apool)) {
! 57: }
! 58:
! 59: VClass(Pool& apool,
! 60: VClass *abase, Hash& afields, Hash& amethods) : VAliased(apool, *this),
! 61:
! 62: fbase(abase),
! 63: ffields(afields),
! 64: fmethods(amethods) {
1.1 paf 65: }
66:
67: void add_method(const String& name, Method& method) {
1.15 paf 68: fmethods.put(name, &method);
1.1 paf 69: }
1.19 paf 70: // Hash& methods() { return fmethods; }
1.15 paf 71:
1.17 paf 72: void set_base(VClass& abase) {
73: // remember the guy
74: fbase=&abase;
1.15 paf 75: }
1.17 paf 76: VClass *base() { return fbase; }
1.18 paf 77:
78: bool is_or_derived_from(VClass& vclass) {
79: return
80: this==&vclass ||
81: fbase && fbase->is_or_derived_from(vclass);
1.19 paf 82: }
83:
84: Junction *get_junction(VAliased& self, const String& name) {
85: if(Method *method=static_cast<Method *>(fmethods.get(name)))
86: return NEW Junction(pool(), self, this, method, 0,0,0,0);
87: if(fbase)
88: return fbase->get_junction(self, name);
89: return 0;
1.18 paf 90: }
1.11 paf 91:
1.17 paf 92: private:
1.11 paf 93:
1.17 paf 94: Value *get_field(const String& name) {
1.23 ! paf 95: Value *result=static_cast<Value *>(ffields.get(name));
1.17 paf 96: if(!result && fbase)
97: result=fbase->get_field(name);
98: return result;
99: }
100:
101: void set_field(const String& name, Value *value) {
102: if(fbase && fbase->replace_field(name, value))
103: return;
104:
1.23 ! paf 105: ffields.put(name, value);
1.17 paf 106: }
107: bool replace_field(const String& name, Value *value) {
108: return
109: (fbase && fbase->replace_field(name, value)) ||
1.23 ! paf 110: ffields.put_replace(name, value);
1.17 paf 111: }
112:
1.1 paf 113: private:
114:
1.17 paf 115: VClass *fbase;
1.23 ! paf 116: Hash& ffields;
! 117: Hash& fmethods;
1.1 paf 118: };
119:
120: #endif
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