在
詞法分析器生成器寫完之后，就要做語法分析器的生成器了。今天完成了生成器的第一個版本。這個語法分析器生成器所做的事情就是從一個C#寫的文法產生出C#寫的該文法對應的語法分析器。在寫文法的時候你需要提供每一個文法的返回類型，以及指定每一個屬性究竟對應著文法的哪一段。為了方便，我提供了預定義的列表文法和左遞歸文法。當然我們知道
手寫遞歸下降分析器都是有套路的，用人寫的話只會浪費人類的時間。文法的寫法跟之前
Vczh Library++ 3.0的
Parser Combinator比較類似，現在讓我們看一下C#是如何表達文法的。這篇文章的所有相關代碼（語法樹、文法、生成的分析器代碼以及生成器的代碼）都可以在
Vczh Library++ 3.0下面找到。過幾天再更加嚴格的測試幾次之后，就可以開始給NativeX寫語法分析器了。一旦完成了之后，就可以寫一個簡單的類型推到程序，這樣就可以在輸入"."和"->"之后產生自動下拉列表啦。
為了測試語法分析器生成器，我給我的測試程序寫了一個帶函數的四則運算式子的文法。這個東西的文法應該是老掉牙的了，不用想都能寫出來：
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Text;
5 using CodeBoxControl.CodeProvider.ParserCodeGenerator;
6 using CodeBoxControlTest.CodeParser;
7
8 namespace ParserBuilder
9 {
10 class CodeParserTestParserBuilder : Parser
11 {
12 public static string Build()
13 {
14 var ID = id("CodeBoxControlTest.CodeParser.CodeParserTokenizer.IdToken");
15 var Number = id("CodeBoxControlTest.CodeParser.CodeParserTokenizer.NumberToken");
16 var FUNCTION = rule<FunctionExpression>("Function");
17 var NUMBER = rule<NumberExpression>("Number");
18 var BRACKET = rule<Expression>("Bracket");
19 var FACTOR = rule<Expression>("Factor");
20 var TERM = rule<Expression>("Term");
21 var EXPRESSION = rule<Expression>("Expression");
22
23 FUNCTION.Infer(
24 ID["Name"] + tok("(") + list<Expression>(tok(","), EXPRESSION)["Parameters"] + tok(")")
25 );
26
27 NUMBER.Infer(
28 Number["Number"]
29 );
30
31 BRACKET.Infer(
32 tok("(") + ret(EXPRESSION) + tok(")")
33 );
34
35 FACTOR.Infer(
36 ret(NUMBER) | ret(FUNCTION) | ret(BRACKET)
37 );
38
39 TERM.Infer(
40 ret(leftrec<BinaryExpression>(FACTOR["Left"], (tok("*")["Operator"] | tok("/")["Operator"]) + FACTOR["Right"]))
41 );
42
43 EXPRESSION.Infer(
44 ret(leftrec<BinaryExpression>(TERM["Left"], (tok("+")["Operator"] | tok("-")["Operator"]) + TERM["Right"]))
45 );
46
47 return ParserGenerator.GenerateCSharpCode(EXPRESSION, "CodeBoxControlTest.CodeParser", "CodeParserAnalyzer");
48 }
49 }
50 }
51
在這里解釋兩條文法。首先是FUNCTION，FUNCTION由函數名和參數表格構成。函數名指定給了Name屬性，而參數表則指定給了Parameters屬性。這里我們可以看到list函數需要指定元素的類型以及元素與元素之間的分隔符。當然分隔符也可以是一條復雜的文法。其次是TERM。這是一個左遞歸的寫法。首先leftrec<T>(a, b)的返回類型是a的類型，而T則指的是當需要左遞歸的時候元素的實際類型，并且a和b所標注的屬性名都是T的屬性。
因此下面給出語法樹的聲明：
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Text;
5 using CodeBoxControl.CodeProvider;
6
7 namespace CodeBoxControlTest.CodeParser
8 {
9 public abstract class Expression : CodeNode
10 {
11 }
12
13 public abstract class NumberExpression : Expression
14 {
15 public double Number { get; set; }
16 }
17
18 public abstract class BinaryExpression : Expression
19 {
20 public abstract Expression Left { get; set; }
21 public abstract Expression Right { get; set; }
22 public string Operator { get; set; }
23 }
24
25 public abstract class FunctionExpression : Expression
26 {
27 public string Name { get; set; }
28 public abstract CodeNodeList<Expression> Parameters { get; set; }
29 }
30 }
31
還是比較短的哈。有了list和leftrec之后就充分解決了復雜文法的通用模式，因此就產生了下面這個很齷齪的、有很多廢話的代碼：
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Text;
5 using CodeBoxControl.CodeProvider;
6
7 namespace CodeBoxControlTest.CodeParser
8 {
9 public static class CodeParserAnalyzer
10 {
11 public static CodeBoxControlTest.CodeParser.Expression ParseExpression(List<CodeToken> tokens, ref int currentToken, ref bool parseSuccess)
12 {
13 CodeBoxControlTest.CodeParser.Expression result = default(CodeBoxControlTest.CodeParser.Expression);
14 {
15 CodeBoxControlTest.CodeParser.Expression result1 = default(CodeBoxControlTest.CodeParser.Expression);
16 int currentIndex1 = currentToken;
17 {
18 {
19 int currentIndex2 = currentIndex1;
20 {
21 parseSuccess = false;
22 result1 = ParseTerm(tokens, ref currentIndex2, ref parseSuccess);
23 }
24 if (parseSuccess)
25 {
26 currentIndex1 = currentIndex2;
27 }
28 else
29 {
30 goto LABEL_0;
31 }
32 while (true)
33 {
34 System.String OperatorMember2 = default(System.String);
35 CodeBoxControlTest.CodeParser.Expression RightMember2 = default(CodeBoxControlTest.CodeParser.Expression);
36 {
37 System.String OperatorMember3 = default(System.String);
38 CodeBoxControlTest.CodeParser.Expression RightMember3 = default(CodeBoxControlTest.CodeParser.Expression);
39 {
40 int currentIndexCopy4 = currentIndex2;
41 int currentIndex4 = currentIndex2;
42 {
43 System.String OperatorMember4 = default(System.String);
44 {
45 int currentIndex5 = -1;
46 currentIndex5 = currentIndex4;
47 {
48 System.String OperatorMember5 = default(System.String);
49 {
50 CodeBoxControl.CodeProvider.CodeToken result6 = default(CodeBoxControl.CodeProvider.CodeToken);
51 int currentIndex6 = currentIndex5;
52 {
53 parseSuccess = false;
54 if (currentIndex6 < tokens.Count && tokens[currentIndex6].Value == "+")
55 {
56 result6 = tokens[currentIndex6];
57 currentIndex6++;
58 parseSuccess = true;
59 }
60 }
61 if (parseSuccess)
62 {
63 currentIndex5 = currentIndex6;
64 OperatorMember5 = result6.Value;
65 }
66 }
67 OperatorMember4 = OperatorMember5;
68 }
69 if (parseSuccess)
70 {
71 currentIndex4 = currentIndex5;
72 goto LABEL_SUCCESS_2;
73 }
74 currentIndex5 = currentIndex4;
75 {
76 System.String OperatorMember5 = default(System.String);
77 {
78 CodeBoxControl.CodeProvider.CodeToken result6 = default(CodeBoxControl.CodeProvider.CodeToken);
79 int currentIndex6 = currentIndex5;
80 {
81 parseSuccess = false;
82 if (currentIndex6 < tokens.Count && tokens[currentIndex6].Value == "-")
83 {
84 result6 = tokens[currentIndex6];
85 currentIndex6++;
86 parseSuccess = true;
87 }
88 }
89 if (parseSuccess)
90 {
91 currentIndex5 = currentIndex6;
92 OperatorMember5 = result6.Value;
93 }
94 }
95 OperatorMember4 = OperatorMember5;
96 }
97 if (parseSuccess)
98 {
99 currentIndex4 = currentIndex5;
100 goto LABEL_SUCCESS_2;
101 }
102 goto LABEL_FAIL_3;
103 LABEL_SUCCESS_2: ;
104 LABEL_FAIL_3: ;
105 }
106 OperatorMember3 = OperatorMember4;
107 }
108 if (parseSuccess)
109 {
110 currentIndexCopy4 = currentIndex4;
111 }
112 else
113 {
114 goto LABEL_1;
115 }
116 {
117 CodeBoxControlTest.CodeParser.Expression RightMember4 = default(CodeBoxControlTest.CodeParser.Expression);
118 {
119 CodeBoxControlTest.CodeParser.Expression result5 = default(CodeBoxControlTest.CodeParser.Expression);
120 int currentIndex5 = currentIndex4;
121 {
122 parseSuccess = false;
123 result5 = ParseTerm(tokens, ref currentIndex5, ref parseSuccess);
124 }
125 if (parseSuccess)
126 {
127 currentIndex4 = currentIndex5;
128 RightMember4 = result5;
129 }
130 }
131 RightMember3 = RightMember4;
132 }
133 if (parseSuccess)
134 {
135 currentIndexCopy4 = currentIndex4;
136 }
137 else
138 {
139 goto LABEL_1;
140 }
141 currentIndex2 = currentIndexCopy4;
142 LABEL_1: ;
143 }
144 OperatorMember2 = OperatorMember3;
145 RightMember2 = RightMember3;
146 }
147 if (parseSuccess)
148 {
149 currentIndex1 = currentIndex2;
150 CodeBoxControlTest.CodeParser.BinaryExpression result2 = CodeNode.Create<CodeBoxControlTest.CodeParser.BinaryExpression>();
151 result2.Operator = OperatorMember2;
152 result2.Right = RightMember2;
153 result2.Left = result1;
154 result1 = result2;
155 }
156 else
157 {
158 break;
159 }
160 }
161 parseSuccess = true;
162 LABEL_0: ;
163 }
164 }
165 if (parseSuccess)
166 {
167 currentToken = currentIndex1;
168 result = result1;
169 }
170 }
171 if (result == null) result = CodeNode.Create<CodeBoxControlTest.CodeParser.Expression>();
172 return result;
173 }
174
175 public static CodeBoxControlTest.CodeParser.Expression ParseTerm(List<CodeToken> tokens, ref int currentToken, ref bool parseSuccess)
176 {
177 CodeBoxControlTest.CodeParser.Expression result = default(CodeBoxControlTest.CodeParser.Expression);
178 {
179 CodeBoxControlTest.CodeParser.Expression result1 = default(CodeBoxControlTest.CodeParser.Expression);
180 int currentIndex1 = currentToken;
181 {
182 {
183 int currentIndex2 = currentIndex1;
184 {
185 parseSuccess = false;
186 result1 = ParseFactor(tokens, ref currentIndex2, ref parseSuccess);
187 }
188 if (parseSuccess)
189 {
190 currentIndex1 = currentIndex2;
191 }
192 else
193 {
194 goto LABEL_0;
195 }
196 while (true)
197 {
198 System.String OperatorMember2 = default(System.String);
199 CodeBoxControlTest.CodeParser.Expression RightMember2 = default(CodeBoxControlTest.CodeParser.Expression);
200 {
201 System.String OperatorMember3 = default(System.String);
202 CodeBoxControlTest.CodeParser.Expression RightMember3 = default(CodeBoxControlTest.CodeParser.Expression);
203 {
204 int currentIndexCopy4 = currentIndex2;
205 int currentIndex4 = currentIndex2;
206 {
207 System.String OperatorMember4 = default(System.String);
208 {
209 int currentIndex5 = -1;
210 currentIndex5 = currentIndex4;
211 {
212 System.String OperatorMember5 = default(System.String);
213 {
214 CodeBoxControl.CodeProvider.CodeToken result6 = default(CodeBoxControl.CodeProvider.CodeToken);
215 int currentIndex6 = currentIndex5;
216 {
217 parseSuccess = false;
218 if (currentIndex6 < tokens.Count && tokens[currentIndex6].Value == "*")
219 {
220 result6 = tokens[currentIndex6];
221 currentIndex6++;
222 parseSuccess = true;
223 }
224 }
225 if (parseSuccess)
226 {
227 currentIndex5 = currentIndex6;
228 OperatorMember5 = result6.Value;
229 }
230 }
231 OperatorMember4 = OperatorMember5;
232 }
233 if (parseSuccess)
234 {
235 currentIndex4 = currentIndex5;
236 goto LABEL_SUCCESS_2;
237 }
238 currentIndex5 = currentIndex4;
239 {
240 System.String OperatorMember5 = default(System.String);
241 {
242 CodeBoxControl.CodeProvider.CodeToken result6 = default(CodeBoxControl.CodeProvider.CodeToken);
243 int currentIndex6 = currentIndex5;
244 {
245 parseSuccess = false;
246 if (currentIndex6 < tokens.Count && tokens[currentIndex6].Value == "/")
247 {
248 result6 = tokens[currentIndex6];
249 currentIndex6++;
250 parseSuccess = true;
251 }
252 }
253 if (parseSuccess)
254 {
255 currentIndex5 = currentIndex6;
256 OperatorMember5 = result6.Value;
257 }
258 }
259 OperatorMember4 = OperatorMember5;
260 }
261 if (parseSuccess)
262 {
263 currentIndex4 = currentIndex5;
264 goto LABEL_SUCCESS_2;
265 }
266 goto LABEL_FAIL_3;
267 LABEL_SUCCESS_2: ;
268 LABEL_FAIL_3: ;
269 }
270 OperatorMember3 = OperatorMember4;
271 }
272 if (parseSuccess)
273 {
274 currentIndexCopy4 = currentIndex4;
275 }
276 else
277 {
278 goto LABEL_1;
279 }
280 {
281 CodeBoxControlTest.CodeParser.Expression RightMember4 = default(CodeBoxControlTest.CodeParser.Expression);
282 {
283 CodeBoxControlTest.CodeParser.Expression result5 = default(CodeBoxControlTest.CodeParser.Expression);
284 int currentIndex5 = currentIndex4;
285 {
286 parseSuccess = false;
287 result5 = ParseFactor(tokens, ref currentIndex5, ref parseSuccess);
288 }
289 if (parseSuccess)
290 {
291 currentIndex4 = currentIndex5;
292 RightMember4 = result5;
293 }
294 }
295 RightMember3 = RightMember4;
296 }
297 if (parseSuccess)
298 {
299 currentIndexCopy4 = currentIndex4;
300 }
301 else
302 {
303 goto LABEL_1;
304 }
305 currentIndex2 = currentIndexCopy4;
306 LABEL_1: ;
307 }
308 OperatorMember2 = OperatorMember3;
309 RightMember2 = RightMember3;
310 }
311 if (parseSuccess)
312 {
313 currentIndex1 = currentIndex2;
314 CodeBoxControlTest.CodeParser.BinaryExpression result2 = CodeNode.Create<CodeBoxControlTest.CodeParser.BinaryExpression>();
315 result2.Operator = OperatorMember2;
316 result2.Right = RightMember2;
317 result2.Left = result1;
318 result1 = result2;
319 }
320 else
321 {
322 break;
323 }
324 }
325 parseSuccess = true;
326 LABEL_0: ;
327 }
328 }
329 if (parseSuccess)
330 {
331 currentToken = currentIndex1;
332 result = result1;
333 }
334 }
335 if (result == null) result = CodeNode.Create<CodeBoxControlTest.CodeParser.Expression>();
336 return result;
337 }
338
339 public static CodeBoxControlTest.CodeParser.Expression ParseFactor(List<CodeToken> tokens, ref int currentToken, ref bool parseSuccess)
340 {
341 CodeBoxControlTest.CodeParser.Expression result = default(CodeBoxControlTest.CodeParser.Expression);
342 {
343 CodeBoxControlTest.CodeParser.Expression result1 = default(CodeBoxControlTest.CodeParser.Expression);
344 int currentIndex1 = -1;
345 currentIndex1 = currentToken;
346 {
347 {
348 CodeBoxControlTest.CodeParser.NumberExpression result2 = default(CodeBoxControlTest.CodeParser.NumberExpression);
349 int currentIndex2 = currentIndex1;
350 {
351 parseSuccess = false;
352 result2 = ParseNumber(tokens, ref currentIndex2, ref parseSuccess);
353 }
354 if (parseSuccess)
355 {
356 currentIndex1 = currentIndex2;
357 result1 = result2;
358 }
359 }
360 }
361 if (parseSuccess)
362 {
363 currentToken = currentIndex1;
364 goto LABEL_SUCCESS_0;
365 }
366 currentIndex1 = currentToken;
367 {
368 {
369 CodeBoxControlTest.CodeParser.FunctionExpression result2 = default(CodeBoxControlTest.CodeParser.FunctionExpression);
370 int currentIndex2 = currentIndex1;
371 {
372 parseSuccess = false;
373 result2 = ParseFunction(tokens, ref currentIndex2, ref parseSuccess);
374 }
375 if (parseSuccess)
376 {
377 currentIndex1 = currentIndex2;
378 result1 = result2;
379 }
380 }
381 }
382 if (parseSuccess)
383 {
384 currentToken = currentIndex1;
385 goto LABEL_SUCCESS_0;
386 }
387 currentIndex1 = currentToken;
388 {
389 {
390 CodeBoxControlTest.CodeParser.Expression result2 = default(CodeBoxControlTest.CodeParser.Expression);
391 int currentIndex2 = currentIndex1;
392 {
393 parseSuccess = false;
394 result2 = ParseBracket(tokens, ref currentIndex2, ref parseSuccess);
395 }
396 if (parseSuccess)
397 {
398 currentIndex1 = currentIndex2;
399 result1 = result2;
400 }
401 }
402 }
403 if (parseSuccess)
404 {
405 currentToken = currentIndex1;
406 goto LABEL_SUCCESS_0;
407 }
408 goto LABEL_FAIL_1;
409 LABEL_SUCCESS_0: ;
410 result = result1;
411 LABEL_FAIL_1: ;
412 }
413 if (result == null) result = CodeNode.Create<CodeBoxControlTest.CodeParser.Expression>();
414 return result;
415 }
416
417 public static CodeBoxControlTest.CodeParser.NumberExpression ParseNumber(List<CodeToken> tokens, ref int currentToken, ref bool parseSuccess)
418 {
419 CodeBoxControlTest.CodeParser.NumberExpression result = default(CodeBoxControlTest.CodeParser.NumberExpression);
420 System.Double NumberMember0 = default(System.Double);
421 {
422 CodeBoxControl.CodeProvider.CodeToken result1 = default(CodeBoxControl.CodeProvider.CodeToken);
423 int currentIndex1 = currentToken;
424 {
425 parseSuccess = false;
426 if (currentIndex1 < tokens.Count && tokens[currentIndex1].Id == CodeBoxControlTest.CodeParser.CodeParserTokenizer.NumberToken)
427 {
428 result1 = tokens[currentIndex1];
429 currentIndex1++;
430 parseSuccess = true;
431 }
432 }
433 if (parseSuccess)
434 {
435 currentToken = currentIndex1;
436 NumberMember0 = System.Double.Parse(result1.Value);
437 }
438 }
439 if (result == null) result = CodeNode.Create<CodeBoxControlTest.CodeParser.NumberExpression>();
440 result.Number = NumberMember0;
441 return result;
442 }
443
444 public static CodeBoxControlTest.CodeParser.FunctionExpression ParseFunction(List<CodeToken> tokens, ref int currentToken, ref bool parseSuccess)
445 {
446 CodeBoxControlTest.CodeParser.FunctionExpression result = default(CodeBoxControlTest.CodeParser.FunctionExpression);
447 System.String NameMember0 = default(System.String);
448 CodeBoxControl.CodeProvider.CodeNodeList<CodeBoxControlTest.CodeParser.Expression> ParametersMember0 = default(CodeBoxControl.CodeProvider.CodeNodeList<CodeBoxControlTest.CodeParser.Expression>);
449 {
450 int currentIndexCopy1 = currentToken;
451 int currentIndex1 = currentToken;
452 {
453 System.String NameMember1 = default(System.String);
454 {
455 CodeBoxControl.CodeProvider.CodeToken result2 = default(CodeBoxControl.CodeProvider.CodeToken);
456 int currentIndex2 = currentIndex1;
457 {
458 parseSuccess = false;
459 if (currentIndex2 < tokens.Count && tokens[currentIndex2].Id == CodeBoxControlTest.CodeParser.CodeParserTokenizer.IdToken)
460 {
461 result2 = tokens[currentIndex2];
462 currentIndex2++;
463 parseSuccess = true;
464 }
465 }
466 if (parseSuccess)
467 {
468 currentIndex1 = currentIndex2;
469 NameMember1 = result2.Value;
470 }
471 }
472 NameMember0 = NameMember1;
473 }
474 if (parseSuccess)
475 {
476 currentIndexCopy1 = currentIndex1;
477 }
478 else
479 {
480 goto LABEL_0;
481 }
482 {
483 parseSuccess = false;
484 if (currentIndex1 < tokens.Count && tokens[currentIndex1].Value == "(")
485 {
486 currentIndex1++;
487 parseSuccess = true;
488 }
489 }
490 if (parseSuccess)
491 {
492 currentIndexCopy1 = currentIndex1;
493 }
494 else
495 {
496 goto LABEL_0;
497 }
498 {
499 CodeBoxControl.CodeProvider.CodeNodeList<CodeBoxControlTest.CodeParser.Expression> ParametersMember1 = default(CodeBoxControl.CodeProvider.CodeNodeList<CodeBoxControlTest.CodeParser.Expression>);
500 {
501 CodeBoxControl.CodeProvider.CodeNodeList<CodeBoxControlTest.CodeParser.Expression> result2 = default(CodeBoxControl.CodeProvider.CodeNodeList<CodeBoxControlTest.CodeParser.Expression>);
502 int currentIndex2 = currentIndex1;
503 {
504 result2 = new CodeBoxControl.CodeProvider.CodeNodeList<CodeBoxControlTest.CodeParser.Expression>();
505 {
506 CodeBoxControlTest.CodeParser.Expression result3 = default(CodeBoxControlTest.CodeParser.Expression);
507 int currentIndex3 = currentIndex2;
508 {
509 parseSuccess = false;
510 result3 = ParseExpression(tokens, ref currentIndex3, ref parseSuccess);
511 }
512 if (parseSuccess)
513 {
514 currentIndex2 = currentIndex3;
515 result2.Add(result3);
516 }
517 while (true)
518 {
519 int currentIndexCopy3 = currentIndex2;
520 {
521 parseSuccess = false;
522 if (currentIndex3 < tokens.Count && tokens[currentIndex3].Value == ",")
523 {
524 currentIndex3++;
525 parseSuccess = true;
526 }
527 }
528 if (parseSuccess)
529 {
530 currentIndexCopy3 = currentIndex3;
531 }
532 else
533 {
534 goto LABEL_1;
535 }
536 {
537 parseSuccess = false;
538 result3 = ParseExpression(tokens, ref currentIndex3, ref parseSuccess);
539 }
540 if (parseSuccess)
541 {
542 currentIndexCopy3 = currentIndex3;
543 }
544 else
545 {
546 goto LABEL_1;
547 }
548 currentIndex2 = currentIndexCopy3;
549 result2.Add(result3);
550 }
551 LABEL_1: ; parseSuccess = true;
552 }
553 }
554 if (parseSuccess)
555 {
556 currentIndex1 = currentIndex2;
557 ParametersMember1 = result2;
558 }
559 }
560 ParametersMember0 = ParametersMember1;
561 }
562 if (parseSuccess)
563 {
564 currentIndexCopy1 = currentIndex1;
565 }
566 else
567 {
568 goto LABEL_0;
569 }
570 {
571 parseSuccess = false;
572 if (currentIndex1 < tokens.Count && tokens[currentIndex1].Value == ")")
573 {
574 currentIndex1++;
575 parseSuccess = true;
576 }
577 }
578 if (parseSuccess)
579 {
580 currentIndexCopy1 = currentIndex1;
581 }
582 else
583 {
584 goto LABEL_0;
585 }
586 currentToken = currentIndexCopy1;
587 LABEL_0: ;
588 }
589 if (result == null) result = CodeNode.Create<CodeBoxControlTest.CodeParser.FunctionExpression>();
590 result.Name = NameMember0;
591 result.Parameters = ParametersMember0;
592 return result;
593 }
594
595 public static CodeBoxControlTest.CodeParser.Expression ParseBracket(List<CodeToken> tokens, ref int currentToken, ref bool parseSuccess)
596 {
597 CodeBoxControlTest.CodeParser.Expression result = default(CodeBoxControlTest.CodeParser.Expression);
598 {
599 CodeBoxControlTest.CodeParser.Expression result1 = default(CodeBoxControlTest.CodeParser.Expression);
600 int currentIndexCopy1 = currentToken;
601 int currentIndex1 = currentToken;
602 {
603 parseSuccess = false;
604 if (currentIndex1 < tokens.Count && tokens[currentIndex1].Value == "(")
605 {
606 currentIndex1++;
607 parseSuccess = true;
608 }
609 }
610 if (parseSuccess)
611 {
612 currentIndexCopy1 = currentIndex1;
613 }
614 else
615 {
616 goto LABEL_0;
617 }
618 {
619 {
620 CodeBoxControlTest.CodeParser.Expression result2 = default(CodeBoxControlTest.CodeParser.Expression);
621 int currentIndex2 = currentIndex1;
622 {
623 parseSuccess = false;
624 result2 = ParseExpression(tokens, ref currentIndex2, ref parseSuccess);
625 }
626 if (parseSuccess)
627 {
628 currentIndex1 = currentIndex2;
629 result1 = result2;
630 }
631 }
632 }
633 if (parseSuccess)
634 {
635 currentIndexCopy1 = currentIndex1;
636 }
637 else
638 {
639 goto LABEL_0;
640 }
641 {
642 parseSuccess = false;
643 if (currentIndex1 < tokens.Count && tokens[currentIndex1].Value == ")")
644 {
645 currentIndex1++;
646 parseSuccess = true;
647 }
648 }
649 if (parseSuccess)
650 {
651 currentIndexCopy1 = currentIndex1;
652 }
653 else
654 {
655 goto LABEL_0;
656 }
657 currentToken = currentIndexCopy1;
658 result = result1;
659 LABEL_0: ;
660 }
661 if (result == null) result = CodeNode.Create<CodeBoxControlTest.CodeParser.Expression>();
662 return result;
663 }
664
665 }
666 }
667
果然自動生成的代碼都是很不能看的呢……
posted on 2010-10-17 01:51
陳梓瀚(vczh) 閱讀(5548)
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