Annotation of parser3/src/types/pa_value.h, revision 1.20
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:
1.20 ! paf 6: $Id: pa_value.h,v 1.19 2001/03/18 17:18:37 paf Exp $
1.1 paf 7: */
8:
9: /*
10: data core
11: */
12:
13: #ifndef PA_VALUE_H
14: #define PA_VALUE_H
15:
16: #include "pa_pool.h"
17: #include "pa_string.h"
18: #include "pa_array.h"
19: #include "pa_exception.h"
1.13 paf 20: #include "pa_globals.h"
1.1 paf 21:
1.9 paf 22: class VStateless_class;
1.1 paf 23: class WContext;
24: class VAliased;
25: class Request;
1.7 paf 26: class VTable;
1.17 paf 27: class Junction;
28: class Method;
1.20 ! paf 29: class Hash;
1.1 paf 30:
31: class Value : public Pooled {
32: public: // Value
33:
34: // all: for error reporting after fail(), etc
35: virtual const char *type() const =0;
36: const String& name() const { return *fname; }
37:
38: // unknown: false
39: // others: true
40: virtual bool get_defined() { return true; }
1.15 paf 41: // string: fstring as VDouble
1.1 paf 42: // bool: this
43: // double: this
44: // int: this
1.7 paf 45: virtual Value *get_expr_result() { bark("(%s) can not be used in expression"); return 0; }
1.19 paf 46:
1.20 ! paf 47: // hash: fhash
! 48: // response: ffields
! 49: virtual Hash *get_hash() { return 0; }
1.1 paf 50:
51: // string: value
52: // unknown: ""
53: // double: value
54: // bool: must be 0: so in ^if(1>2) it would'nt become "FALSE" string which is 'true'
55: // others: 0
1.16 paf 56: // WContext: accumulated fstring
1.1 paf 57: virtual const String *get_string() { return 0; }
58:
59: // string: value
60: // double: value
61: // integer: finteger
62: // bool: value
1.7 paf 63: virtual double get_double() { bark("(%s) does not have numerical value"); return 0; }
1.1 paf 64:
65: // unknown: false
66: // bool: value
1.15 paf 67: // integer: 0 or !0
1.1 paf 68: // double: 0 or !0
1.15 paf 69: virtual bool get_bool() { bark("(%s) does not have logical value"); return 0; }
1.1 paf 70:
1.7 paf 71: // junction: itself
1.1 paf 72: virtual Junction *get_junction() { return 0; }
73:
1.6 paf 74: // table: itself
1.7 paf 75: virtual VTable *get_vtable() { return 0; }
1.6 paf 76:
1.1 paf 77: // hash: (key)=value
78: // object_class: (field)=STATIC.value;(STATIC)=hash;(method)=method_ref with self=object_class
1.3 paf 79: // object_base: (CLASS)=vclass;(BASE)=base;(method)=method_ref
1.1 paf 80: // object_instance: (field)=value;(CLASS)=vclass;(method)=method_ref
81: // operator_class: (field)=value - static values only
82: // codeframe: wcontext_transparent
83: // methodframe: my or self_transparent
1.6 paf 84: // table: column
1.9 paf 85: // env: CLASS,BASE,method,field
1.11 paf 86: // form: CLASS,BASE,method,field
1.14 paf 87: // string: $CLASS,$BASE,$method
1.17 paf 88: // request: CLASS,BASE,method,fields
1.18 paf 89: // response: CLASS,BASE,method,fields
1.7 paf 90: virtual Value *get_element(const String& name) { bark("(%s) does not have elements"); return 0; }
1.1 paf 91:
92: // hash: (key)=value
93: // object_class, operator_class: (field)=value - static values only
94: // object_instance: (field)=value
95: // codeframe: wcontext_transparent
96: // methodframe: my or self_transparent
1.18 paf 97: // response: (attribute)=value
1.7 paf 98: virtual void put_element(const String& name, Value *value) { bark("(%s) does not accept elements"); }
1.1 paf 99:
100: // object_class, object_instance: object_class
101: // wcontext: none yet | transparent
1.12 paf 102: // form: this
103: // class: this
104: // env: this
1.17 paf 105: // request: this
1.18 paf 106: // hash: this
1.9 paf 107: virtual VStateless_class *get_class() { return 0; }
1.1 paf 108:
109: // valiased: this
110: // wcontext: transparent
111: // methodframe: self_transparent
112: virtual VAliased *get_aliased() { return 0; }
113:
114: public: // usage
115:
116: Value(Pool& apool) : Pooled(apool), fname(unnamed_name) {
117: }
118:
119: void set_name(const String& aname) { fname=&aname; }
120:
121: const String& as_string() {
122: const String *result=get_string();
123: if(!result)
1.7 paf 124: bark("(%s) not a string");
1.6 paf 125:
126: return *result;
127: }
128:
1.7 paf 129: VTable& as_vtable() {
130: VTable *result=get_vtable();
1.6 paf 131: if(!result)
1.7 paf 132: bark("(%s) not a table object");
1.6 paf 133:
1.1 paf 134: return *result;
135: }
136:
137: private:
138:
139: const String *fname;
140:
1.6 paf 141: protected:
1.1 paf 142:
1.7 paf 143: void bark(char *action) const {
1.1 paf 144: THROW(0,0,
145: &name(),
146: action, type());
147: }
148:
1.17 paf 149: };
150:
151: typedef void (*Native_code_ptr)(Request& request,
152: const String& method_name, Array *params);
153:
154: class Junction : public Pooled {
155: public:
156:
157: Junction(Pool& apool,
158: Value& aself,
159: VStateless_class *avclass, const Method *amethod,
160: Value *aroot,
161: Value *arcontext,
162: WContext *awcontext,
163: const Array *acode) : Pooled(apool),
164:
165: self(aself),
166: vclass(avclass), method(amethod),
167: root(aroot),
168: rcontext(arcontext),
169: wcontext(awcontext),
170: code(acode) {
171: }
172:
173: // always present
174: Value& self;
175: // either these // so called 'method-junction'
176: VStateless_class *vclass; const Method *method;
177: // or these are present // so called 'code-junction'
178: Value *root;
179: Value *rcontext;
180: WContext *wcontext;
181: const Array *code;
182: };
183:
184: class Method : public Pooled {
185: public:
186: const String& name;
187: // either numbered params // for native-code methods = operators
188: int min_numbered_params_count, max_numbered_params_count;
189: // or named params&locals // for parser-code methods
190: Array *params_names; Array *locals_names;
191: // the Code
192: const Array *parser_code;/*OR*/Native_code_ptr native_code;
193:
194: Method(
195: Pool& apool,
196: const String& aname,
197: int amin_numbered_params_count, int amax_numbered_params_count,
198: Array *aparams_names, Array *alocals_names,
199: const Array *aparser_code, Native_code_ptr anative_code) :
200:
201: Pooled(apool),
202: name(aname),
203: min_numbered_params_count(amin_numbered_params_count),
204: max_numbered_params_count(amax_numbered_params_count),
205: params_names(aparams_names), locals_names(alocals_names),
206: parser_code(aparser_code), native_code(anative_code) {
207: }
208:
209: void check_actual_numbered_params(
210: Value& self, const String& actual_name, Array *actual_numbered_params) const {
211: int actual_count=actual_numbered_params?actual_numbered_params->size():0;
212: if(actual_count<min_numbered_params_count) // not proper count? bark
213: THROW(0, 0,
214: &actual_name,
215: "native method of %s (%s) accepts minimum %d parameter(s)",
216: self.name().cstr(),
217: self.type(),
218: min_numbered_params_count);
219:
220: }
1.1 paf 221: };
222:
223: #endif
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