随笔-341  评论-2670  文章-0  trackbacks-0
    在词法分析器生成器写完之后,就要做语法分析器的生成器了。今天完成了生成器的第一个版本。这个语法分析器生成器所做的事情就是从一个C#写的文法产生出C#写的该文法对应的语法分析器。在写文法的时候你需要提供每一个文法的返回类型,以及指定每一个属性究竟对应着文法的哪一段。为了方便,我提供了预定义的列表文法和左递归文法。当然我们知道手写递归下降分析器都是有套路的,用人写的话只会浪费人类的时间。文法的写法跟之前Vczh Library++ 3.0Parser Combinator比较类似,现在让我们看一下C#是如何表达文法的。这篇文章的所有相关代码(语法树、文法、生成的分析器代码以及生成器的代码)都可以在Vczh Library++ 3.0下面找到。过几天再更加严格的测试几次之后,就可以开始给NativeX写语法分析器了。一旦完成了之后,就可以写一个简单的类型推到程序,这样就可以在输入"."和"->"之后产生自动下拉列表啦。

    为了测试语法分析器生成器,我给我的测试程序写了一个带函数的四则运算式子的文法。这个东西的文法应该是老掉牙的了,不用想都能写出来:
 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 

    在这里解释两条文法。首先是FUNCTION,FUNCTION由函数名和参数表格构成。函数名指定给了Name属性,而参数表则指定给了Parameters属性。这里我们可以看到list函数需要指定元素的类型以及元素与元素之间的分隔符。当然分隔符也可以是一条复杂的文法。其次是TERM。这是一个左递归的写法。首先leftrec<T>(a, b)的返回类型是a的类型,而T则指的是当需要左递归的时候元素的实际类型,并且a和b所标注的属性名都是T的属性。

    因此下面给出语法树的声明:
 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 { getset; }
16     }
17 
18     public abstract class BinaryExpression : Expression
19     {
20         public abstract Expression Left { getset; }
21         public abstract Expression Right { getset; }
22         public string Operator { getset; }
23     }
24 
25     public abstract class FunctionExpression : Expression
26     {
27         public string Name { getset; }
28         public abstract CodeNodeList<Expression> Parameters { getset; }
29     }
30 }
31 

    还是比较短的哈。有了list和leftrec之后就充分解决了复杂文法的通用模式,因此就产生了下面这个很龌龊的、有很多废话的代码:
  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 

    果然自动生成的代码都是很不能看的呢……
posted on 2010-10-17 17:51 陈梓瀚(vczh) 阅读(4825) 评论(4)  编辑 收藏 引用 所属分类: 开发自己的IDE

评论:
# re: 开发自己的IDE(七) 2010-10-17 21:23 | mm
好强大!!!  回复  更多评论
  
# re: 开发自己的IDE(七)[未登录] 2010-10-18 09:57 | dd
太长的生成的代码,就折叠了不要展开了吧?  回复  更多评论
  
# re: 开发自己的IDE(七) 2010-10-18 10:20 | 陈梓瀚(vczh)
@dd
反正鼠标有滚轮,就麻烦自己滚一下哈。  回复  更多评论
  
# re: 开发自己的IDE(七)[未登录] 2010-10-18 10:47 | ccsdu2009
人才 赞就一个字  回复  更多评论
  

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