| 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364 |
1
5
5
13
13
13
13
5
351
5
3
3
2
1
1
1
5
2
1
5
1
1
1
1
1
1
1
1
327
32
32
33
32
32
32
31
1
1
1
1
1
1
1
1
5
5
6
6
6
6
6
1
5
64
1
2
2
2
1
1
1
2
1
1
1
1
1
1
56
406
19
13
4
2
2
2
1
13
2
9
9
8
9
9
4
4
4
3
4
4
1
1
1
1
3
3
3
1
1
1
1
2
2
2
44
44
44
44
2
2
2
1
1
1
1
1
1
5
5
5
5
5
1
1
1
1
1
1
4
1
1
1
1
1
3
3
3
3
5
2
1
1
1
1
9
9
15
15
15
1
1
1
14
14
14
14
1
1
1
1
1
251
251
250
32
32
32
31
31
| /*!
* Copyright (C) 2017 Glayzzle (BSD3 License)
* @authors https://github.com/glayzzle/php-parser/graphs/contributors
* @url http://glayzzle.com
*/
module.exports = {
/**
* reading a list of top statements (helper for top_statement*)
* ```ebnf
* top_statements ::= top_statement*
* ```
*/
read_top_statements: function() {
var result = [];
while(this.token !== this.EOF && this.token !== '}') {
var statement = this.read_top_statement();
Eif (statement) {
Iif (Array.isArray(statement)) {
result = result.concat(statement);
} else {
result.push(statement);
}
}
}
return result;
}
/**
* reading a top statement
* ```ebnf
* top_statement ::=
* namespace | function | class
* | interface | trait
* | use_statements | const_list
* | statement
* ```
*/
,read_top_statement: function() {
switch(this.token) {
case this.tok.T_FUNCTION:
return this.read_function(false, false);
// optional flags
case this.tok.T_ABSTRACT:
case this.tok.T_FINAL:
var flag = this.read_class_scope();
if (this.token === this.tok.T_CLASS) {
return this.read_class(flag);
} else {
this.error(this.tok.T_CLASS);
this.next();
return null;
}
case this.tok.T_CLASS:
return this.read_class([0, 0, 0]);
case this.tok.T_INTERFACE:
return this.read_interface();
case this.tok.T_TRAIT:
return this.read_trait();
case this.tok.T_USE:
return this.read_use_statement();
case this.tok.T_CONST:
return this.next().read_const_list();
case this.tok.T_NAMESPACE:
return this.read_namespace();
case this.tok.T_HALT_COMPILER:
var result = this.node('halt');
Eif (this.next().expect('(')) this.next();
Eif (this.expect(')')) this.next();
this.expect(';');
this.lexer.done = true;
return result(this.lexer._input.substring(
this.lexer.offset
));
default:
return this.read_statement();
}
}
/**
* reads a list of simple inner statements (helper for inner_statement*)
* ```ebnf
* inner_statements ::= inner_statement*
* ```
*/
,read_inner_statements: function() {
var result = [];
while(this.token != this.EOF && this.token !== '}') {
var statement = this.read_inner_statement();
Eif (statement) {
Iif (Array.isArray(statement)) {
result = result.concat(statement);
} else {
result.push(statement);
}
}
}
return result;
}
/**
* Reads a list of constants declaration
* ```ebnf
* const_list ::= T_CONST T_STRING '=' expr (',' T_STRING '=' expr)* ';'
* ```
*/
,read_const_list: function() {
var result = this.read_list(function() {
this.expect(this.tok.T_STRING);
var result = this.node('constant');
var name = this.text();
Eif (this.next().expect('=')) {
return result(name, this.next().read_expr());
} else {
// fallback
return result(name, null);
}
}, ',', false);
this.expectEndOfStatement();
return result;
}
/**
* Reads a list of constants declaration
* ```ebnf
* declare_list ::= T_STRING '=' expr (',' T_STRING '=' expr)*
* ```
* @retrurn {Object}
*/
,read_declare_list: function() {
var result = {};
while(this.token != this.EOF && this.token !== ')') {
this.expect(this.tok.T_STRING);
var name = this.text().toLowerCase();
Eif (this.next().expect('=')) {
result[name] = this.next().read_expr();
} else {
result[name] = null;
}
if (this.token !== ',') break;
this.next();
}
return result;
}
/**
* reads a simple inner statement
* ```ebnf
* inner_statement ::= '{' inner_statements '}' | token
* ```
*/
,read_inner_statement: function() {
switch(this.token) {
case this.tok.T_FUNCTION:
return this.read_function(false, false);
// optional flags
case this.tok.T_ABSTRACT:
case this.tok.T_FINAL:
var flag = this.read_class_scope();
Eif (this.token === this.tok.T_CLASS) {
return this.read_class(flag);
} else {
this.error(this.tok.T_CLASS);
// graceful mode : ignore token & go next
this.next();
return null;
}
case this.tok.T_CLASS:
return this.read_class([0, 0, 0]);
case this.tok.T_INTERFACE:
return this.read_interface();
case this.tok.T_TRAIT:
return this.read_trait();
case this.tok.T_HALT_COMPILER:
this.raiseError(
'__HALT_COMPILER() can only be used from the outermost scope'
);
// fallback : returns a node but does not stop the parsing
var node = this.node('halt');
this.next().expect('(') && this.next();
this.expect(')') && this.next();
node = node(this.lexer._input.substring(
this.lexer.offset
));
this.expect(';') && this.next();
return node;
default:
return this.read_statement();
}
}
/**
* Reads statements
*/
,read_statement: function() {
switch(this.token) {
case '{': return this.read_code_block(false);
case this.tok.T_IF: return this.next().read_if();
case this.tok.T_SWITCH: return this.read_switch();
case this.tok.T_FOR: return this.next().read_for();
case this.tok.T_FOREACH: return this.next().read_foreach();
case this.tok.T_WHILE: return this.next().read_while();
case this.tok.T_DO: return this.next().read_do();
case this.tok.T_COMMENT: return this.read_comment();
case this.tok.T_DOC_COMMENT: return this.read_doc_comment();
case this.tok.T_RETURN:
var result = this.node('return'), expr = null;
if (!this.next().is('EOS')) {
expr = this.read_expr();
}
this.expectEndOfStatement();
return result(expr);
// https://github.com/php/php-src/blob/master/Zend/zend_language_parser.y#L429
case this.tok.T_BREAK:
case this.tok.T_CONTINUE:
var result = this.node(
this.token === this.tok.T_CONTINUE ? 'continue' : 'break'
), level = null;
this.next(); // look ahead
if (this.token !== ';' && this.token !== this.tok.T_CLOSE_TAG) {
level = this.read_expr();
}
this.expectEndOfStatement();
return result(level);
case this.tok.T_GLOBAL:
var result = this.node('global');
var items = this.next().read_list(this.read_simple_variable, ',');
this.expectEndOfStatement();
return result(items);
case this.tok.T_STATIC:
var current = [this.token, this.lexer.getState()];
var result = this.node('static');
if (this.next().token === this.tok.T_DOUBLE_COLON) {
// static keyword for a class
this.lexer.tokens.push(current);
var expr = this.next().read_expr();
this.expect(';') && this.nextWithComments();
return expr;
}
var items = this.read_variable_declarations();
this.expectEndOfStatement();
return result(items);
case this.tok.T_ECHO:
var result = this.node('echo');
var args = this.next().read_list(this.read_expr, ',');
this.expectEndOfStatement();
return result(args);
case this.tok.T_INLINE_HTML:
var result = this.node('inline'), value = this.text();
this.next();
return result(value);
case this.tok.T_UNSET:
var result = this.node('unset');
this.next().expect('(') && this.next();
var items = this.read_list(this.read_variable, ',');
this.expect(')') && this.next();
this.expect(';') && this.nextWithComments();
return result(items);
case this.tok.T_DECLARE:
var result = this.node('declare'),
what,
body = [],
mode;
this.next().expect('(') && this.next();
what = this.read_declare_list();
this.expect(')') && this.next();
if (this.token === ':') {
this.nextWithComments();
while(this.token != this.EOF && this.token !== this.tok.T_ENDDECLARE) {
// @todo : check declare_statement from php / not valid
body.push(this.read_top_statement());
}
this.expect(this.tok.T_ENDDECLARE) && this.next();
this.expectEndOfStatement();
mode = this.ast.declare.MODE_SHORT;
} else if (this.token === '{') {
this.nextWithComments();
while(this.token != this.EOF && this.token !== '}') {
// @todo : check declare_statement from php / not valid
body.push(this.read_top_statement());
}
this.expect('}') && this.next();
mode = this.ast.declare.MODE_BLOCK;
} else {
this.expect(';') && this.nextWithComments();
while(this.token != this.EOF && this.token !== this.tok.T_DECLARE) {
// @todo : check declare_statement from php / not valid
body.push(this.read_top_statement());
}
mode = this.ast.declare.MODE_NONE;
}
return result(what, body, mode);
case this.tok.T_TRY:
return this.read_try();
case this.tok.T_THROW:
var result = this.node('throw');
var expr = this.next().read_expr();
this.expectEndOfStatement();
return result(expr);
case ';': // ignore this (extra ponctuation)
case this.tok.T_CLOSE_TAG: // empty tag
this.next();
return null;
case this.tok.T_STRING:
var current = [this.token, this.lexer.getState()];
var label = this.text();
if (this.next().token === ':') {
var result = this.node('label');
this.next();
return result(label);
} else {
// default fallback expr
this.lexer.tokens.push(current);
var expr = this.next().read_expr();
this.expect([';', this.tok.T_CLOSE_TAG]) && this.nextWithComments();
return expr;
}
case this.tok.T_GOTO:
var result = this.node('goto'), label = null;
Eif (this.next().expect(this.tok.T_STRING)) {
label = this.text();
this.next().expectEndOfStatement();
}
return result(label);
default: // default fallback expr
var expr = this.read_expr();
this.expectEndOfStatement();
return expr;
}
}
/**
* ```ebnf
* code_block ::= '{' (inner_statements | top_statements) '}'
* ```
*/
,read_code_block: function(top) {
var result = this.node('block');
this.expect('{') && this.nextWithComments();
var body = top ?
this.read_top_statements()
: this.read_inner_statements()
;
this.expect('}') && this.nextWithComments();
return result(null, body);
}
};
|