Annotation of parser3/src/types/pa_vstateless_class.h, revision 1.42.2.11
1.6 paf 1: /** @file
2: Parser: stateless class decls.
3:
1.42.2.10 paf 4: Copyright (c) 2001-2003 ArtLebedev Group (http://www.artlebedev.com)
1.23 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.2 paf 6: */
7:
8: #ifndef PA_VSTATELESS_CLASS_H
9: #define PA_VSTATELESS_CLASS_H
1.27 paf 10:
1.42.2.11! paf 11: static const char* IDENT_VSTATELESS_CLASS_H="$Date: 2003/01/31 12:34:45 $";
1.42.2.4 paf 12:
13: // include
1.2 paf 14:
1.13 paf 15: #include "pa_hash.h"
1.2 paf 16: #include "pa_vjunction.h"
1.42.2.11! paf 17: #include "pa_method.h"
1.2 paf 18:
1.38 paf 19: // defines
20:
21: #define CLASS_NAME "CLASS"
22:
23: // forwards
24:
1.42.2.8 paf 25: class VStateless_class; DECLARE_OBJECT_PTR(VStateless_class);
1.42.2.3 paf 26:
1.2 paf 27: class Temp_method;
28:
1.6 paf 29: /**
1.30 paf 30: object' class. stores
31: - base: VClass::base()
32: - methods: VStateless_class::fmethods
1.6 paf 33:
1.30 paf 34: @see Method, VStateless_object, Temp_method
1.6 paf 35: */
1.39 paf 36: class VStateless_class: public Value {
1.19 paf 37: friend class Temp_method;
1.42.2.3 paf 38:
1.42.2.9 paf 39: StringPtr fname;
1.42.2.3 paf 40: mutable CharPtr fname_cstr;
1.42.2.9 paf 41: Hash<StringPtr, MethodPtr> fmethods;
1.42.2.8 paf 42:
43: bool flocked;
1.42.2.3 paf 44:
45: protected:
46:
1.42.2.10 paf 47: VStateless_class* fbase;
1.42.2.3 paf 48:
1.2 paf 49: public: // Value
50:
1.42.2.10 paf 51: const char* type() const { return "stateless_class"; }
1.2 paf 52:
1.5 paf 53: /// VStateless_class: this
1.42.2.1 paf 54: override VStateless_class *get_class() { return this; }
1.41 paf 55: /// VStateless_class: fbase
1.42.2.10 paf 56: override ValuePtr base() { return ValuePtr(fbase); }
1.42.2.9 paf 57: override ValuePtr get_element(StringPtr aname, Value& aself, bool looking_up);
1.2 paf 58:
59: public: // usage
60:
1.42.2.1 paf 61: VStateless_class(
1.42.2.9 paf 62: StringPtr aname=StringPtr(0),
1.42.2.10 paf 63: VStateless_class* abase=0):
1.24 paf 64: fname(aname),
1.42.2.1 paf 65: fbase(abase) {
1.2 paf 66: }
67:
1.42.2.8 paf 68: void lock() { flocked=true; }
69:
1.42.2.9 paf 70: StringPtr name() const {
1.24 paf 71: if(!fname) {
72: if(fbase)
73: return fbase->name();
74:
75: throw Exception("parser.runtime",
1.42.2.1 paf 76: Exception::undefined_source,
1.24 paf 77: "getting name of nameless class");
78: }
79:
1.42.2.1 paf 80: return fname;
1.24 paf 81: }
1.42.2.10 paf 82: const char* name_cstr() const{
1.42.2.1 paf 83: if(this) {
84: fname_cstr=name()->cstr();
85: return fname_cstr.get();
86: } else
87: return "<unknown>";
1.24 paf 88: }
1.42.2.9 paf 89: void set_name(StringPtr aname) {
1.42.2.1 paf 90: fname=aname;
1.24 paf 91: }
92:
1.42.2.9 paf 93: Method *get_method(StringPtr name) const {
1.42.2.8 paf 94: if(MethodPtr result=fmethods.get(name))
95: return result.get();
96: return 0;
1.2 paf 97: }
98:
1.42.2.9 paf 99: void add_method(StringPtr name, MethodPtr method);
1.40 paf 100:
1.2 paf 101: void add_native_method(
1.42.2.10 paf 102: const char* cstr_name,
1.9 paf 103: Method::Call_type call_type,
1.42.2.7 paf 104: NativeCodePtr native_code,
1.2 paf 105: int min_numbered_params_count, int max_numbered_params_count);
106:
1.42.2.10 paf 107: VStateless_class* set_base(VStateless_class* abase) {
108: VStateless_class* result=fbase;
1.2 paf 109: // remember the guy
1.32 paf 110: fbase=abase;
111: return result;
1.2 paf 112: }
1.42.2.10 paf 113: VStateless_class* base_class() { return fbase; }
1.2 paf 114:
1.30 paf 115: bool derived_from(VStateless_class& vclass) {
1.2 paf 116: return
1.42.2.10 paf 117: fbase==&vclass ||
1.30 paf 118: fbase && fbase->derived_from(vclass);
1.31 paf 119: }
120:
1.11 paf 121: //@{
122: /// @name just stubs, real onces defined below the hierarchy
1.42.2.11! paf 123: virtual ValuePtr get_field(StringPtr) { return ValuePtr(0); }
1.42.2.9 paf 124: virtual bool replace_field(StringPtr, ValuePtr) { return false; }
1.21 paf 125: //@}
126:
127: /// @returns new value for current class, used in classes/ & VClass
1.42.2.11! paf 128: virtual ValuePtr create_new_value() { return ValuePtr(0); }
1.2 paf 129:
130: private: // Temp_method
131:
1.42.2.9 paf 132: MethodPtr get_method_ptr(StringPtr name) const {
1.42.2.8 paf 133: return fmethods.get(name);
134: }
1.42.2.9 paf 135: void put_method(StringPtr aname, MethodPtr amethod) {
1.8 paf 136: fmethods.put(aname, amethod);
137: }
1.2 paf 138:
139: };
140:
1.6 paf 141: /// Auto-object used for temporarily substituting/removing class method
1.2 paf 142: class Temp_method {
143: VStateless_class& fclass;
1.42.2.9 paf 144: StringPtr fname;
1.42.2.8 paf 145: MethodPtr saved_method;
1.2 paf 146: public:
1.42.2.9 paf 147: Temp_method(VStateless_class& aclass, StringPtr aname, MethodPtr amethod) :
1.2 paf 148: fclass(aclass),
149: fname(aname),
1.42.2.8 paf 150: saved_method(aclass.get_method_ptr(aname)) {
1.2 paf 151: fclass.put_method(aname, amethod);
152: }
153: ~Temp_method() {
154: fclass.put_method(fname, saved_method);
155: }
156: };
157:
158: #endif
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