Annotation of parser3/src/include/pa_value.h, revision 1.50
1.50 ! paf 1: /*
! 2: Parser
! 3: Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
! 4: Author: Alexander Petrosyan <paf@design.ru>
1.48 paf 5:
1.50 ! paf 6: $Id: pa_string.C,v 1.35 2001/03/10 12:12:51 paf Exp $
1.1 paf 7: */
8:
9: /*
10: data core
11: */
12:
13: #ifndef PA_VALUE_H
14: #define PA_VALUE_H
15:
1.9 paf 16: #include "pa_pool.h"
1.1 paf 17: #include "pa_string.h"
1.9 paf 18: #include "pa_array.h"
1.48 paf 19: #include "pa_exception.h"
1.49 paf 20: #include "core.h"
1.1 paf 21:
1.27 paf 22: #define NAME_NAME "NAME"
23:
1.9 paf 24: class Value;
25: class VClass;
26: class Junction;
27: class WContext;
1.33 paf 28: class VAliased;
1.43 paf 29: class Request;
30:
1.48 paf 31: typedef void (*Native_code_ptr)(Request& request, Array *params);
1.9 paf 32:
33: class Method : public Pooled {
1.1 paf 34: public:
1.11 paf 35: const String& name;
1.44 paf 36: // either numbered params // for native-code methods = operators
1.48 paf 37: int min_numbered_params_count, max_numbered_params_count;
1.44 paf 38: // or named params&locals // for parser-code methods
39: Array *params_names; Array *locals_names;
40: // the Code
1.43 paf 41: const Array *parser_code;/*OR*/Native_code_ptr native_code;
1.9 paf 42:
43: Method(
44: Pool& apool,
1.11 paf 45: const String& aname,
1.48 paf 46: int amin_numbered_params_count, int amax_numbered_params_count,
1.44 paf 47: Array *aparams_names, Array *alocals_names,
1.43 paf 48: const Array *aparser_code, Native_code_ptr anative_code) :
1.19 paf 49:
1.9 paf 50: Pooled(apool),
51: name(aname),
1.48 paf 52: min_numbered_params_count(amin_numbered_params_count),
53: max_numbered_params_count(amax_numbered_params_count),
1.44 paf 54: params_names(aparams_names), locals_names(alocals_names),
1.43 paf 55: parser_code(aparser_code), native_code(anative_code) {
1.9 paf 56: }
1.48 paf 57:
58: void check_actual_numbered_params(Array *actual_numbered_params) {
59: int actual_count=actual_numbered_params?actual_numbered_params->size():0;
60: if(actual_count<min_numbered_params_count) // not proper count? bark
61: THROW(0, 0,
62: &name,
63: "native method accepts minimum %d parameters",
64: min_numbered_params_count);
65:
66: }
1.1 paf 67: };
68:
1.21 paf 69: class Junction : public Pooled {
1.2 paf 70: public:
71:
1.20 paf 72: Junction(Pool& apool,
1.34 paf 73: Value& aself,
1.33 paf 74: VClass *avclass, Method *amethod,
1.20 paf 75: Value *aroot,
76: Value *arcontext,
1.24 paf 77: WContext *awcontext,
1.23 paf 78: const Array *acode) : Pooled(apool),
1.20 paf 79:
1.24 paf 80: self(aself),
1.33 paf 81: vclass(avclass), method(amethod),
1.20 paf 82: root(aroot),
83: rcontext(arcontext),
1.24 paf 84: wcontext(awcontext),
1.20 paf 85: code(acode) {
86: }
87:
1.43 paf 88: // always present
1.34 paf 89: Value& self;
1.43 paf 90: // either these // so called 'method-junction'
1.33 paf 91: VClass *vclass; Method *method;
1.43 paf 92: // or these are present // so called 'code-junction'
1.21 paf 93: Value *root;
94: Value *rcontext;
1.24 paf 95: WContext *wcontext;
1.23 paf 96: const Array *code;
1.8 paf 97: };
98:
1.9 paf 99: class Value : public Pooled {
1.17 paf 100: public: // Value
1.9 paf 101:
102: // all: for error reporting after fail(), etc
1.13 paf 103: virtual const char *type() const =0;
1.49 paf 104: const String& name() const { return *fname; }
1.9 paf 105:
1.40 paf 106: // unknown: false
107: // others: true
108: virtual bool get_defined() { return true; }
1.48 paf 109: // string: fvalue as VDouble
110: // bool: this
111: // double: this
112: // int: this
113: virtual Value *get_expr_result() { failed("getting expression result of '%s'"); return 0; }
1.40 paf 114:
1.13 paf 115: // string: value
1.16 paf 116: // unknown: ""
1.38 paf 117: // double: value
1.45 paf 118: // bool: must be 0: so in ^if(1>2) it would'nt become "FALSE" string which is 'true'
1.16 paf 119: // others: 0
1.49 paf 120: virtual const String *get_string() { return 0; }
1.9 paf 121:
1.13 paf 122: // string: value
1.37 paf 123: // double: value
1.48 paf 124: // integer: finteger
1.39 paf 125: // bool: value
1.37 paf 126: virtual double get_double() { failed("getting numerical value of '%s'"); return 0; }
1.39 paf 127:
128: // unknown: false
129: // bool: value
130: // double: 0 or !0
131: // string: empty or not
1.40 paf 132: // hash: size!=0
133: // TODO table: count!=0
134: // others: true
1.39 paf 135: virtual bool get_bool() { return true; }
1.1 paf 136:
1.9 paf 137: // junction: auto_calc,root,self,rcontext,wcontext, code
1.23 paf 138: virtual Junction *get_junction() { return 0; }
1.8 paf 139:
1.1 paf 140: // hash: (key)=value
1.2 paf 141: // object_class: (field)=STATIC.value;(STATIC)=hash;(method)=method_ref with self=object_class
1.29 paf 142: // object_instance: (field)=value;(CLASS)=vclass;(method)=method_ref
1.7 paf 143: // operator_class: (field)=value - static values only
1.24 paf 144: // codeframe: wcontext_transparent
1.30 paf 145: // methodframe: my or self_transparent
1.42 paf 146: virtual Value *get_element(const String& name) { failed("type is '%s', can not get element from it"); return 0; }
1.13 paf 147:
1.15 paf 148: // hash: (key)=value
1.9 paf 149: // object_class, operator_class: (field)=value - static values only
1.26 paf 150: // object_instance: (field)=value
1.24 paf 151: // codeframe: wcontext_transparent
1.30 paf 152: // methodframe: my or self_transparent
1.29 paf 153: virtual void put_element(const String& name, Value *value) { failed("type is '%s', can not put element to it"); }
1.5 paf 154:
155: // object_class, object_instance: object_class
1.32 paf 156: // wcontext: none yet | transparent
1.9 paf 157: virtual VClass *get_class() { return 0; }
1.34 paf 158:
159: // valiased: this
160: // wcontext: transparent
1.35 paf 161: // methodframe: self_transparent
1.36 paf 162: virtual VAliased *get_aliased() { return 0; }
1.9 paf 163:
1.17 paf 164: public: // usage
165:
1.49 paf 166: Value(Pool& apool) : Pooled(apool), fname(unnamed_name) {
1.28 paf 167: }
1.17 paf 168:
1.49 paf 169: void set_name(const String& aname) { fname=&aname; }
1.18 paf 170:
1.49 paf 171: const String& as_string() {
172: const String *result=get_string();
1.17 paf 173: if(!result)
1.25 paf 174: failed("getting string of '%s'");
1.17 paf 175: return *result;
176: }
1.9 paf 177:
1.18 paf 178: private:
179:
1.49 paf 180: const String *fname;
1.18 paf 181:
1.9 paf 182: private:
1.6 paf 183:
1.46 paf 184: void failed(char *action) const;
1.1 paf 185: };
186:
187: #endif
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