Annotation of parser3/src/types/pa_vclass.h, revision 1.6
1.1 paf 1: /*
2: Parser
3: Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
1.2 paf 4: Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
1.1 paf 5:
1.6 ! paf 6: $Id: pa_vclass.h,v 1.5 2001/03/12 09:41:00 paf Exp $
1.1 paf 7: */
8:
9: #ifndef PA_VCLASS_H
10: #define PA_VCLASS_H
11:
12: #include "pa_valiased.h"
13: #include "pa_vhash.h"
14: #include "pa_vjunction.h"
15:
16: #define CLASS_NAME "CLASS"
17: #define BASE_NAME "BASE"
18:
1.4 paf 19: class Temp_method;
20:
1.1 paf 21: class VClass : public VAliased {
1.4 paf 22: friend Temp_method;
1.1 paf 23: public: // Value
24:
25: // all: for error reporting after fail(), etc
26: const char *type() const { return "class"; }
27:
28: // object_class: (field)=STATIC.value;(STATIC)=hash;(method)=method_ref with self=object_class
29: Value *get_element(const String& aname);
30:
31: // object_class, operator_class: (field)=value - static values only
32: void put_element(const String& name, Value *value);
33:
34: // object_class, object_instance: object_class
35: VClass *get_class() { return this; }
36:
37: public: // usage
38:
39: VClass(Pool& apool) : VAliased(apool, *this),
1.6 ! paf 40: read_only(false),
1.1 paf 41: fbase(0),
42: ffields(apool),
43: fmethods(apool) {
44: }
45:
1.5 paf 46: Method *get_method(const String& name) {
47: return static_cast<Method *>(fmethods.get(name));
48: }
49:
1.6 ! paf 50: // make class read-only
! 51: // this blocks
! 52: // put_method // which could be done with ^process
! 53: // put_element // - - - - - CLASS:static_field
! 54: void freeze() { read_only=true; }
! 55:
1.1 paf 56: void add_method(const String& name, Method& method) {
1.6 ! paf 57: put_method(name, &method);
1.1 paf 58: }
1.3 paf 59: void add_native_method(
60: const char *cstr_name,
61: Native_code_ptr native_code,
62: int min_numbered_params_count, int max_numbered_params_count);
1.1 paf 63:
64: void set_base(VClass& abase) {
65: // remember the guy
66: fbase=&abase;
67: }
68: VClass *base() { return fbase; }
69:
70: bool is_or_derived_from(VClass& vclass) {
71: return
72: this==&vclass ||
73: fbase && fbase->is_or_derived_from(vclass);
74: }
75:
76: Junction *get_junction(VAliased& self, const String& name) {
77: if(Method *method=static_cast<Method *>(fmethods.get(name)))
78: return NEW Junction(pool(), self, this, method, 0,0,0,0);
79: if(fbase)
80: return fbase->get_junction(self, name);
81: return 0;
82: }
83:
84: void set_field(const String& name, Value *value) {
1.4 paf 85: if(value) // used in ^process to temporarily remove @main
86: value->set_name(name);
1.1 paf 87: if(fbase && fbase->replace_field(name, value))
88: return;
89:
90: ffields.put(name, value);
91: }
92:
93: private:
94:
95: Value *get_field(const String& name) {
96: Value *result=static_cast<Value *>(ffields.get(name));
97: if(!result && fbase)
98: result=fbase->get_field(name);
99: return result;
100: }
101:
102: bool replace_field(const String& name, Value *value) {
103: return
104: (fbase && fbase->replace_field(name, value)) ||
105: ffields.put_replace(name, value);
106: }
1.4 paf 107:
108: private: // Temp_method
109:
1.6 ! paf 110: void put_method(const String& aname, Method *amethod);
1.1 paf 111:
112: private:
113:
1.6 ! paf 114: bool read_only;
1.1 paf 115: VClass *fbase;
116: Hash ffields;
117: Hash fmethods;
1.4 paf 118: };
119:
120: class Temp_method {
121: VClass& fclass;
122: const String& fname;
123: Method *saved_method;
124: public:
125: Temp_method(VClass& aclass, const String& aname, Method *amethod) :
126: fclass(aclass),
127: fname(aname),
128: saved_method(aclass.get_method(aname)) {
129: fclass.put_method(aname, amethod);
130: }
131: ~Temp_method() {
132: fclass.put_method(fname, saved_method);
133: }
1.1 paf 134: };
135:
136: #endif
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