Annotation of parser3/src/types/pa_vstateless_class.h, revision 1.42.2.5
1.6 paf 1: /** @file
2: Parser: stateless class decls.
3:
1.42 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:
1.42.2.5! paf 11: static const char* IDENT_VSTATELESS_CLASS_H="$Date: 2003/01/29 09:16:17 $";
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"
17:
1.38 paf 18: // defines
19:
20: #define CLASS_NAME "CLASS"
21:
22: // forwards
23:
1.42.2.3 paf 24: class VStateless_class;
25: DECLARE_OBJECT_PTR(VStateless_class)
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:
39: ConstStringPtr fname;
40: mutable CharPtr fname_cstr;
41: Hash<ConstStringPtr, Method *> fmethods;
42:
43: protected:
44:
45: VStateless_classPtr fbase;
46:
1.2 paf 47: public: // Value
48:
49: const char *type() const { return "stateless_class"; }
50:
1.5 paf 51: /// VStateless_class: this
1.42.2.1 paf 52: override VStateless_class *get_class() { return this; }
1.41 paf 53: /// VStateless_class: fbase
1.42.2.3 paf 54: override ValuePtr base() { return ValuePtr(fbase.get()); }
1.42.2.1 paf 55: override ValuePtr get_element(ConstStringPtr aname, Value& aself, bool looking_up);
1.2 paf 56:
57: public: // usage
58:
1.42.2.1 paf 59: VStateless_class(
1.42.2.5! paf 60: ConstStringPtr aname=ConstStringPtr(0),
! 61: VStateless_classPtr abase=VStateless_classPtr(0)):
1.24 paf 62: fname(aname),
1.42.2.1 paf 63: fbase(abase) {
1.2 paf 64: }
65:
1.42.2.1 paf 66: ConstStringPtr name() const {
1.24 paf 67: if(!fname) {
68: if(fbase)
69: return fbase->name();
70:
71: throw Exception("parser.runtime",
1.42.2.1 paf 72: Exception::undefined_source,
1.24 paf 73: "getting name of nameless class");
74: }
75:
1.42.2.1 paf 76: return fname;
1.24 paf 77: }
1.42.2.1 paf 78: const char *name_cstr() const{
79: if(this) {
80: fname_cstr=name()->cstr();
81: return fname_cstr.get();
82: } else
83: return "<unknown>";
1.24 paf 84: }
1.42.2.1 paf 85: void set_name(ConstStringPtr aname) {
86: fname=aname;
1.24 paf 87: }
88:
1.42.2.1 paf 89: Method *get_method(ConstStringPtr name) const {
90: return fmethods.get(name);
1.2 paf 91: }
92:
1.42.2.1 paf 93: void add_method(ConstStringPtr name, Method& method);
1.40 paf 94:
1.2 paf 95: void add_native_method(
96: const char *cstr_name,
1.9 paf 97: Method::Call_type call_type,
1.2 paf 98: Native_code_ptr native_code,
99: int min_numbered_params_count, int max_numbered_params_count);
100:
1.42.2.3 paf 101: VStateless_classPtr set_base(VStateless_classPtr abase) {
102: VStateless_classPtr result=fbase;
1.2 paf 103: // remember the guy
1.32 paf 104: fbase=abase;
105: return result;
1.2 paf 106: }
1.42.2.3 paf 107: VStateless_classPtr base_class() { return fbase; }
1.2 paf 108:
1.30 paf 109: bool derived_from(VStateless_class& vclass) {
1.2 paf 110: return
1.42.2.3 paf 111: fbase.get()==&vclass ||
1.30 paf 112: fbase && fbase->derived_from(vclass);
1.31 paf 113: }
114:
1.11 paf 115: //@{
116: /// @name just stubs, real onces defined below the hierarchy
1.42.2.3 paf 117: virtual ValuePtr get_field(ConstStringPtr) { return 0; }
1.42.2.1 paf 118: virtual bool replace_field(ConstStringPtr, ValuePtr) { return false; }
1.21 paf 119: //@}
120:
121: /// @returns new value for current class, used in classes/ & VClass
1.42.2.3 paf 122: virtual ValuePtr create_new_value() { return 0; }
1.2 paf 123:
124: private: // Temp_method
125:
1.42.2.1 paf 126: void put_method(ConstStringPtr aname, Method * amethod) {
1.8 paf 127: fmethods.put(aname, amethod);
128: }
1.2 paf 129:
130: };
131:
1.6 paf 132: /// Auto-object used for temporarily substituting/removing class method
1.2 paf 133: class Temp_method {
134: VStateless_class& fclass;
1.42.2.1 paf 135: ConstStringPtr fname;
1.2 paf 136: Method *saved_method;
137: public:
1.42.2.1 paf 138: Temp_method(VStateless_class& aclass, ConstStringPtr aname, Method *amethod) :
1.2 paf 139: fclass(aclass),
140: fname(aname),
141: saved_method(aclass.get_method(aname)) {
142: fclass.put_method(aname, amethod);
143: }
144: ~Temp_method() {
145: fclass.put_method(fname, saved_method);
146: }
147: };
148:
149: #endif
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