Annotation of parser3/src/include/pa_vclass.h, revision 1.24
1.1 paf 1: /*
1.24 ! paf 2: $Id: pa_vclass.h,v 1.23 2001/03/08 16:54:25 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"; }
1.23 paf 21:
1.1 paf 22: // object_class: (field)=STATIC.value;(STATIC)=hash;(method)=method_ref with self=object_class
1.22 paf 23: Value *get_element(const String& aname) {
1.17 paf 24: // $NAME=my name
1.15 paf 25: if(aname==NAME_NAME)
1.23 paf 26: return NEW VString(fclass_alias->name());
1.17 paf 27: // $CLASS=my class=myself
28: if(aname==CLASS_NAME)
1.23 paf 29: return fclass_alias;
1.17 paf 30: // $BASE=my parent
31: if(aname==BASE_NAME)
1.23 paf 32: return fclass_alias->base();
1.19 paf 33: // $method=junction(self+class+method)
34: if(Junction *junction=get_junction(*this, aname))
35: return NEW VJunction(*junction);
1.17 paf 36: // $field=static field
37: return get_field(aname);
1.1 paf 38: }
39:
40: // object_class, operator_class: (field)=value - static values only
1.4 paf 41: void put_element(const String& name, Value *value) {
1.17 paf 42: set_field(name, value);
1.1 paf 43: }
44:
45: // object_class, object_instance: object_class
1.17 paf 46: VClass *get_class() { return this; }
1.1 paf 47:
48: public: // usage
49:
1.19 paf 50: VClass(Pool& apool) : VAliased(apool, *this),
1.23 paf 51: fbase(0),
52: ffields(*new(apool) Hash(apool)),
53: fmethods(*new(apool) Hash(apool)) {
54: }
55:
56: VClass(Pool& apool,
57: VClass *abase, Hash& afields, Hash& amethods) : VAliased(apool, *this),
58:
59: fbase(abase),
60: ffields(afields),
61: fmethods(amethods) {
1.1 paf 62: }
63:
64: void add_method(const String& name, Method& method) {
1.15 paf 65: fmethods.put(name, &method);
1.1 paf 66: }
1.19 paf 67: // Hash& methods() { return fmethods; }
1.15 paf 68:
1.17 paf 69: void set_base(VClass& abase) {
70: // remember the guy
71: fbase=&abase;
1.15 paf 72: }
1.17 paf 73: VClass *base() { return fbase; }
1.18 paf 74:
75: bool is_or_derived_from(VClass& vclass) {
76: return
77: this==&vclass ||
78: fbase && fbase->is_or_derived_from(vclass);
1.19 paf 79: }
80:
81: Junction *get_junction(VAliased& self, const String& name) {
82: if(Method *method=static_cast<Method *>(fmethods.get(name)))
83: return NEW Junction(pool(), self, this, method, 0,0,0,0);
84: if(fbase)
85: return fbase->get_junction(self, name);
86: return 0;
1.18 paf 87: }
1.11 paf 88:
1.17 paf 89: private:
1.11 paf 90:
1.17 paf 91: Value *get_field(const String& name) {
1.23 paf 92: Value *result=static_cast<Value *>(ffields.get(name));
1.17 paf 93: if(!result && fbase)
94: result=fbase->get_field(name);
95: return result;
96: }
97:
98: void set_field(const String& name, Value *value) {
99: if(fbase && fbase->replace_field(name, value))
100: return;
101:
1.23 paf 102: ffields.put(name, value);
1.17 paf 103: }
104: bool replace_field(const String& name, Value *value) {
105: return
106: (fbase && fbase->replace_field(name, value)) ||
1.23 paf 107: ffields.put_replace(name, value);
1.17 paf 108: }
109:
1.1 paf 110: private:
111:
1.17 paf 112: VClass *fbase;
1.23 paf 113: Hash& ffields;
114: Hash& fmethods;
1.1 paf 115: };
116:
117: #endif
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