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