【背景】
之前已经实现了，antlr的预处理，支持宏替换。
但是现在遇到了问题，对于没有参数的宏的识别和替换，都不支持。
【折腾过程】
1.修改相关的代码：
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 | DIRECTIVE@init{ List args = new ArrayList(); boolean condition = true; String arg0Text = ""; String arg1Text = ""; String definedContent = ""; String defineId = "";}@after{//SETTEXT(GETTEXT()->substring(GETTEXT(),1,GETTEXT()->len-1))//String processedTokenStr = GETTEXT();//String processedTokenStr = state.text;//String processedTokenStr = getText();//String processedTokenStr = this.getText();//System.out.println("after process, whole token string is" + processedTokenStr);}: ('#define' WS* defineMacro=RAW_IDENTIFIER { args.add(""); // first element will hold the macro text } ( ( '(' // get arguments if you find them (no spaces before left paren) (WS)? defineArg0=RAW_IDENTIFIER (WS)? {arg0Text = defineArg0.getText(); args.add(arg0Text);} ( ',' (WS)? defineArg1=RAW_IDENTIFIER (WS)? {arg1Text = defineArg1.getText(); args.add(arg1Text);} )* ')' | ' '|'\t'|'\f' ) ( options{greedy=true;}: ' '|'\t'|'\f' )* // store the text verbatim - tokenize when called macroText=MACRO_TEXT { definedContent = macroText.getText(); definedContent = definedContent.replace("\\", ""); // remove mutile line define last's '\' args.set(0, definedContent); } )? '\r'? '\n' { defineId = defineMacro.getText(); globalDefineMap.put(defineId, args ); skip(); //process the define content, to check whether it contain the previous define //if yes, then process it // // save current lexer's state // SaveStruct ss = new SaveStruct(input); // includes.push(ss); // // switch on new input stream // setCharStream(new ANTLRStringStream(definedContent)); // reset(); // isReplacingDefineContent = true; } ) /* { //process the define content, to check whether it contain the previous define //if yes, then process it // save current lexer's state SaveStruct ss = new SaveStruct(input); includes.push(ss); // switch on new input stream setCharStream(new ANTLRStringStream(definedContent)); reset(); //after replacement //update the define map -> replace to the replaced text String processedDefineContent = macroText.getText(); args.set(0, processedDefineContent); globalDefineMap.put(defineId, args ); skip(); } */; |
为：
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 | DIRECTIVE@init{ List args = new ArrayList(); boolean condition = true; String arg0Text = ""; String arg1Text = ""; String definedContent = ""; String defineId = "";}@after{//SETTEXT(GETTEXT()->substring(GETTEXT(),1,GETTEXT()->len-1))//String processedTokenStr = GETTEXT();//String processedTokenStr = state.text;//String processedTokenStr = getText();//String processedTokenStr = this.getText();//System.out.println("after process, whole token string is" + processedTokenStr);}: ('#define' WS* defineMacro=RAW_IDENTIFIER { args.add(""); // first element will hold the macro text } ( ( '(' // get arguments if you find them (no spaces before left paren) (WS)? (defineArg0=RAW_IDENTIFIER (WS)? {arg0Text = defineArg0.getText(); args.add(arg0Text);})? ( ',' (WS)? defineArg1=RAW_IDENTIFIER (WS)? {arg1Text = defineArg1.getText(); args.add(arg1Text);} )* ')' | ' '|'\t'|'\f' ) ( options{greedy=true;}: ' '|'\t'|'\f' )* // store the text verbatim - tokenize when called macroText=MACRO_TEXT { definedContent = macroText.getText(); definedContent = definedContent.replace("\\", ""); // remove mutile line define last's '\' args.set(0, definedContent); } )? '\r'? '\n' { defineId = defineMacro.getText(); globalDefineMap.put(defineId, args ); skip(); //process the define content, to check whether it contain the previous define //if yes, then process it // // save current lexer's state // SaveStruct ss = new SaveStruct(input); // includes.push(ss); // // switch on new input stream // setCharStream(new ANTLRStringStream(definedContent)); // reset(); // isReplacingDefineContent = true; } ) /* { //process the define content, to check whether it contain the previous define //if yes, then process it // save current lexer's state SaveStruct ss = new SaveStruct(input); includes.push(ss); // switch on new input stream setCharStream(new ANTLRStringStream(definedContent)); reset(); //after replacement //update the define map -> replace to the replaced text String processedDefineContent = macroText.getText(); args.set(0, processedDefineContent); globalDefineMap.put(defineId, args ); skip(); } */; |
就可以识别
#define xxx() yyy
的定义了。
2.后来经过折腾，把：
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 | IDENTIFIER@init{ List define = new ArrayList(); List foundArgs = new ArrayList(); String callArg0Text = ""; String callArg1Text = "";}@after{//String curCallParaText = getText();// if(foundArgs.size() == 0)// {// //remove () if no para// setText("");// }} : identifier=RAW_IDENTIFIER { String IdText = (String)identifier.getText(); // see if this is a macro argument define = (List)globalDefineArgsMap.get(IdText); while(define != null) { //if define not null, then find recursively to get para's real value String firstParaValue = (String)define.get(0); if(globalDefineArgsMap.containsKey(firstParaValue)) { define = (List)globalDefineArgsMap.get(firstParaValue); } else { break; } } if (define==null) { // see if this is a macro call define = (List)globalDefineMap.get(IdText); //System.out.println("normal define call=" + IdText); } else { //is define args replacement isReplacingDefineContent = true; //System.out.println("normal define args call=" + (String)define.get(0)); } } ( {(define!=null) && (define.size()>=1)}?=> (WS|COMMENT)? // take in arguments if macro call requires them '(' callArg0=EXPR { callArg0Text = callArg0.getText(); foundArgs.add(callArg0Text); } ( COMMA callArg1=EXPR { callArg1Text = callArg1.getText(); foundArgs.add(callArg1Text); } )* { foundArgs.size()==define.size()-1 }? // better have right amount ')' | {!((define!=null) && (define.size()>1))}?=> ){if (define!=null) { String defineText = (String)define.get(0); if (define.size()==1) { //only have one value in list -> the defineText is the define para content -> just need replace directly setText(defineText); } else { //add new dict pair: (para, call value) for (int i=0;i<foundArgs.size();++i) { // treat macro arguments similar to local defines List arg = new ArrayList(); arg.add((String)foundArgs.get(i)); globalDefineArgsMap.put( (String)define.get(1+i), arg ); } // save current lexer's state SaveStruct ss = new SaveStruct(input); includes.push(ss); // switch on new input stream setCharStream(new ANTLRStringStream(defineText)); reset(); }}}; |
改为：
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 | IDENTIFIER@init{ List define = new ArrayList(); List foundArgs = new ArrayList(); String callArg0Text = ""; String callArg1Text = "";}@after{//String curCallParaText = getText();// if(foundArgs.size() == 0)// {// //remove () if no para// setText("");// }} : identifier=RAW_IDENTIFIER { String IdText = (String)identifier.getText(); // see if this is a macro argument define = (List)globalDefineArgsMap.get(IdText); while(define != null) { //if define not null, then find recursively to get para's real value String firstParaValue = (String)define.get(0); if(globalDefineArgsMap.containsKey(firstParaValue)) { define = (List)globalDefineArgsMap.get(firstParaValue); } else { break; } } if (define==null) { // see if this is a macro call define = (List)globalDefineMap.get(IdText); //System.out.println("normal define call=" + IdText); } else { //is define args replacement isReplacingDefineContent = true; //System.out.println("normal define args call=" + (String)define.get(0)); } } ( {(define!=null) && (define.size()>=1)}?=> (WS|COMMENT)? // take in arguments if macro call requires them '(' callArg0=EXPR { callArg0Text = callArg0.getText(); //foundArgs.add(callArg0Text); //maybe whitespace, so need trim here if(!callArg0Text.isEmpty() && !callArg0Text.trim().isEmpty()) { foundArgs.add(callArg0Text); } } ( COMMA callArg1=EXPR { callArg1Text = callArg1.getText(); //foundArgs.add(callArg1Text); //maybe whitespace, so need trim here if(!callArg1Text.isEmpty() && !callArg1Text.trim().isEmpty()) { foundArgs.add(callArg1Text); } } )* { foundArgs.size()==define.size()-1 }? // better have right amount ')' | {!((define!=null) && (define.size()>1))}?=> ){if (define!=null) { String defineText = (String)define.get(0); if (define.size()==1) { //only have one value in list -> the defineText is the define para content -> just need replace directly setText(defineText); } else { //add new dict pair: (para, call value) for (int i=0;i<foundArgs.size();++i) { // treat macro arguments similar to local defines List arg = new ArrayList(); arg.add((String)foundArgs.get(i)); globalDefineArgsMap.put( (String)define.get(1+i), arg ); } // save current lexer's state SaveStruct ss = new SaveStruct(input); includes.push(ss); // switch on new input stream setCharStream(new ANTLRStringStream(defineText)); reset(); }}}; |
就可以识别无参数的调用了，比如处理：
1 2 3 4 5 6 7 | #define SETVALUE(a) getValue(a+1)SETVALUE(2);#define GET_DEV_VAR_VALUE() _get_dev_var_value((a),(b),METHODID(c))GET_DEV_VAR_VALUE(); |
为：
1 2 3 4 | getValue(2+1);_get_dev_var_value((a),(b),METHODID(c)); |
3.但是上述存在一个bug，就是当调用无参数耳朵宏的时候，故意添加了多个空格到括号里面时（甚至空格里面有tab），会无法识别。
比如这种：
1 2 3 4 5 6 7 | #define SETVALUE(a) getValue(a+1)SETVALUE(2);#define GET_DEV_VAR_VALUE() _get_dev_var_value((a),(b),METHODID(c))GET_DEV_VAR_VALUE( ); |
就不支持。
所以后来又添加两个 WS* ，改为：
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 | IDENTIFIER@init{ List define = new ArrayList(); List foundArgs = new ArrayList(); String callArg0Text = ""; String callArg1Text = "";}@after{//String curCallParaText = getText();// if(foundArgs.size() == 0)// {// //remove () if no para// setText("");// }} : identifier=RAW_IDENTIFIER { String IdText = (String)identifier.getText(); // see if this is a macro argument define = (List)globalDefineArgsMap.get(IdText); while(define != null) { //if define not null, then find recursively to get para's real value String firstParaValue = (String)define.get(0); if(globalDefineArgsMap.containsKey(firstParaValue)) { define = (List)globalDefineArgsMap.get(firstParaValue); } else { break; } } if (define==null) { // see if this is a macro call define = (List)globalDefineMap.get(IdText); //System.out.println("normal define call=" + IdText); } else { //is define args replacement isReplacingDefineContent = true; //System.out.println("normal define args call=" + (String)define.get(0)); } } ( {(define!=null) && (define.size()>=1)}?=> (WS|COMMENT)? // take in arguments if macro call requires them '(' WS* callArg0=EXPR { callArg0Text = callArg0.getText(); //foundArgs.add(callArg0Text); //maybe whitespace, so need trim here if(!callArg0Text.isEmpty() && !callArg0Text.trim().isEmpty()) { foundArgs.add(callArg0Text); } } ( COMMA callArg1=EXPR { callArg1Text = callArg1.getText(); //foundArgs.add(callArg1Text); //maybe whitespace, so need trim here if(!callArg1Text.isEmpty() && !callArg1Text.trim().isEmpty()) { foundArgs.add(callArg1Text); } } )* { foundArgs.size()==define.size()-1 }? // better have right amount WS* ')' | {!((define!=null) && (define.size()>1))}?=> ){if (define!=null) { String defineText = (String)define.get(0); if (define.size()==1) { //only have one value in list -> the defineText is the define para content -> just need replace directly setText(defineText); } else { //add new dict pair: (para, call value) for (int i=0;i<foundArgs.size();++i) { // treat macro arguments similar to local defines List arg = new ArrayList(); arg.add((String)foundArgs.get(i)); globalDefineArgsMap.put( (String)define.get(1+i), arg ); } // save current lexer's state SaveStruct ss = new SaveStruct(input); includes.push(ss); // switch on new input stream setCharStream(new ANTLRStringStream(defineText)); reset(); }}}; |
就支持，无参数的宏调用的时候，括号里面有空格（甚至tab等whitespace）。
【总结】
最终，通过如下antlr的.g语法：
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 | grammar preprocess;//lexer grammar preprocess;options{ language=Java; output = AST;}@lexer::header {//package com.mm.antlrv3demo;import java.io.*;import java.util.*;}@parser::header {//package com.mm.antlrv3demo;}@lexer::members { //public static TokenStreamSelector selector; // must be assigned externally protected static Integer ifState = 1; // -1: no-else false, 0:false, 1: true protected static List ifStates = new ArrayList(); // holds nested if conditions protected static Map globalDefineMap = new Hashtable(); // holds the globalDefineMap protected Map globalDefineArgsMap = new Hashtable(); // holds the args for a macro call /* public void uponEOF() throws TokenStreamException, CharStreamException { try { selector.pop(); // return to old lexer/stream selector.retry(); } catch (NoSuchElementException e) { // return a real EOF if nothing in stack } } */ protected static boolean isReplacingDefineContent = false; class SaveStruct { SaveStruct(CharStream input){ this.input = input; this.marker = input.mark(); } public CharStream input; public int marker; } Stack<SaveStruct> includes = new Stack<SaveStruct>(); // class SaveStruct_defines { // SaveStruct(CharStream input){ // this.input = input; // this.marker = input.mark(); // } // public CharStream input; // public int marker; // } // Stack<SaveStruct_defines> definesSaveStruct = new Stack<SaveStruct_defines>(); // We should override this method for handling EOF of included file public Token nextToken(){ Token token = super.nextToken(); if(token.getType() == Token.EOF && !includes.empty()){ // We've got EOF and have non empty stack. SaveStruct ss = includes.pop(); setCharStream(ss.input); input.rewind(ss.marker); //this should be used instead of super [like below] to handle exits from nested includes //it matters, when the 'include' token is the last in previous stream (using super, lexer 'crashes' returning EOF token) token = this.nextToken(); } // Skip first token after switching on another input. // You need to use this rather than super as there may be nested include files if(((CommonToken)token).getStartIndex() < 0) token = this.nextToken(); return token; }}COMMENT : ('//' ~('\n'|'\r')* '\r'? '\n') {skip();} | ('/*' ( options {greedy=false;} : . )* '*/') {skip();} ;// and lexer ruleINCLUDE : '#include' (WS)? f=STRING { String name = f.getText(); name = name.substring(1,name.length()-1); try { // save current lexer's state SaveStruct ss = new SaveStruct(input); includes.push(ss); // switch on new input stream setCharStream(new ANTLRFileStream(name)); reset(); } catch(Exception fnf) { throw new Error("Cannot open file " + name); }};/*fragmentNON_CR_LF : ~('\r'|'\n');fragmentTAB_SPACE : (' ' | '\t');*///DIRECTIVE : ('#define' WS* defineMacro=ID WS* defineText=STRING)//DIRECTIVE : ('#define' WS* defineMacro=ID WS* defineText=( NON_CR_LF+ | (NON_CR_LF* (TAB_SPACE+ '\\' '\r'? '\n' NON_CR_LF+)*) ) )fragment//MACRO_TEXT : ( (('\\'){skip();System.out.println("skip line tail back slash");} '\r'? '\n')//MACRO_TEXT : ( ('\\'{$channel=HIDDEN;System.out.println("set back slash to hidden");} '\r'? '\n')//MACRO_TEXT : ( (('\\'){setText("");System.out.println("set back slash to empty");} '\r'? '\n')MACRO_TEXT : (('\\' '\r'? '\n') | (~('\r'|'\n')))*;//MACRO_TEXT : (('\\' '\r'? '\n') | (~('\n')))*;//MACRO_TEXT : (('\\' '\n') | (~('\n')))*;//MACRO_TEXT : (('\\' '\n') | (~('\n' | '\r')))*;//MACRO_TEXT : ( ('\\' '\r'? '\n') | (~('\r'|'\n')))* -> ( ('\r'? '\n') | (~('\r'|'\n')))*;//MACRO_TEXT : (('\\'{setText("");} '\r'? '\n') | (~('\r'|'\n')))*;/*MACRO_TEXT : ((('\\' '\r'? '\n') | (~('\r'|'\n')))*) { String origMultiLineStr = getText(); String newMultiLineStr = origMultiLineStr.replace("\\", ""); setText(newMultiLineStr); };*///MACRO_TEXT : ( (('\\' '\r'? '\n')=>('\r' '\n')) | (~('\r'|'\n')))*;DIRECTIVE@init{ List args = new ArrayList(); boolean condition = true; String arg0Text = ""; String arg1Text = ""; String definedContent = ""; String defineId = "";}@after{//SETTEXT(GETTEXT()->substring(GETTEXT(),1,GETTEXT()->len-1))//String processedTokenStr = GETTEXT();//String processedTokenStr = state.text;//String processedTokenStr = getText();//String processedTokenStr = this.getText();//System.out.println("after process, whole token string is" + processedTokenStr);}: ('#define' WS* defineMacro=RAW_IDENTIFIER { args.add(""); // first element will hold the macro text } ( ( '(' // get arguments if you find them (no spaces before left paren) (WS)? (defineArg0=RAW_IDENTIFIER (WS)? {arg0Text = defineArg0.getText(); args.add(arg0Text);})? ( ',' (WS)? defineArg1=RAW_IDENTIFIER (WS)? {arg1Text = defineArg1.getText(); args.add(arg1Text);} )* ')' | ' '|'\t'|'\f' ) ( options{greedy=true;}: ' '|'\t'|'\f' )* // store the text verbatim - tokenize when called macroText=MACRO_TEXT { definedContent = macroText.getText(); definedContent = definedContent.replace("\\", ""); // remove mutile line define last's '\' args.set(0, definedContent); } )? '\r'? '\n' { defineId = defineMacro.getText(); globalDefineMap.put(defineId, args ); skip(); //process the define content, to check whether it contain the previous define //if yes, then process it // // save current lexer's state // SaveStruct ss = new SaveStruct(input); // includes.push(ss); // // switch on new input stream // setCharStream(new ANTLRStringStream(definedContent)); // reset(); // isReplacingDefineContent = true; } ) /* { //process the define content, to check whether it contain the previous define //if yes, then process it // save current lexer's state SaveStruct ss = new SaveStruct(input); includes.push(ss); // switch on new input stream setCharStream(new ANTLRStringStream(definedContent)); reset(); //after replacement //update the define map -> replace to the replaced text String processedDefineContent = macroText.getText(); args.set(0, processedDefineContent); globalDefineMap.put(defineId, args ); skip(); } */;IDENTIFIER@init{ List define = new ArrayList(); List foundArgs = new ArrayList(); String callArg0Text = ""; String callArg1Text = "";}@after{//String curCallParaText = getText();// if(foundArgs.size() == 0)// {// //remove () if no para// setText("");// }} : identifier=RAW_IDENTIFIER { String IdText = (String)identifier.getText(); // see if this is a macro argument define = (List)globalDefineArgsMap.get(IdText); while(define != null) { //if define not null, then find recursively to get para's real value String firstParaValue = (String)define.get(0); if(globalDefineArgsMap.containsKey(firstParaValue)) { define = (List)globalDefineArgsMap.get(firstParaValue); } else { break; } } if (define==null) { // see if this is a macro call define = (List)globalDefineMap.get(IdText); //System.out.println("normal define call=" + IdText); } else { //is define args replacement isReplacingDefineContent = true; //System.out.println("normal define args call=" + (String)define.get(0)); } } ( {(define!=null) && (define.size()>=1)}?=> (WS|COMMENT)? // take in arguments if macro call requires them '(' WS* callArg0=EXPR { callArg0Text = callArg0.getText(); //foundArgs.add(callArg0Text); //maybe whitespace, so need trim here if(!callArg0Text.isEmpty() && !callArg0Text.trim().isEmpty()) { foundArgs.add(callArg0Text); } } ( COMMA callArg1=EXPR { callArg1Text = callArg1.getText(); //foundArgs.add(callArg1Text); //maybe whitespace, so need trim here if(!callArg1Text.isEmpty() && !callArg1Text.trim().isEmpty()) { foundArgs.add(callArg1Text); } } )* { foundArgs.size()==define.size()-1 }? // better have right amount WS* ')' | {!((define!=null) && (define.size()>1))}?=> ){if (define!=null) { String defineText = (String)define.get(0); if (define.size()==1) { //only have one value in list -> the defineText is the define para content -> just need replace directly setText(defineText); } else { //add new dict pair: (para, call value) for (int i=0;i<foundArgs.size();++i) { // treat macro arguments similar to local defines List arg = new ArrayList(); arg.add((String)foundArgs.get(i)); globalDefineArgsMap.put( (String)define.get(1+i), arg ); } // save current lexer's state SaveStruct ss = new SaveStruct(input); includes.push(ss); // switch on new input stream setCharStream(new ANTLRStringStream(defineText)); reset(); }}};fragment RAW_IDENTIFIER : ('a'..'z'|'A'..'Z'|'_') ('a'..'z'|'A'..'Z'|'_'|'0'..'9')* ;NUMBER : ('0'..'9') ('0'..'9'|'a'..'z'|'A'..'Z'|'_')* ; // allow ahpha suffixes on numbers (i.e. L:long)// group symbols into categories to parse EXPRLEFT : '(' | '[' | '{' ;RIGHT : ')' | ']' | '}' ;COMMA : ',' ;OPERATOR : '!' | '#' | '$' | '%' | '&' | '*' | '+' | '-' | '.' | '/' | ':' | ';' | '<' | '=' | '>' | '?' | '@' | '\\' | '^' | '`' | '|' | '~' ;fragment EXPR // allow just about anything without being ambiguous : (WS)? (NUMBER|IDENTIFIER)? ( ( LEFT EXPR ( COMMA EXPR )* RIGHT | STRING | OPERATOR // quotes, COMMA, LEFT, and RIGHT not in here ) EXPR )? ;//INT : '0'..'9'+ ;FLOAT : ('0'..'9')+ '.' ('0'..'9')* EXPONENT? | '.' ('0'..'9')+ EXPONENT? | ('0'..'9')+ EXPONENT ;WS : ( ' ' | '\t' | '\r' | '\n' ) {$channel=HIDDEN;} ;//RestSymbo : '{' | '}' | '&' | ';' | ',' | '+' | '-' | ')' | '(' | '~' | '/' | '`' | '$' | '@' | '%' | '^' | '#' | '\\' ;STRING : '"' ( ESC_SEQ | ~('\\'|'"') )* '"' ;CHAR: '\'' ( ESC_SEQ | ~('\''|'\\') ) '\'' ;fragmentEXPONENT : ('e'|'E') ('+'|'-')? ('0'..'9')+ ;fragmentHEX_DIGIT : ('0'..'9'|'a'..'f'|'A'..'F') ;fragmentESC_SEQ : '\\' ('b'|'t'|'n'|'f'|'r'|'\"'|'\''|'\\') | UNICODE_ESC | OCTAL_ESC ;fragmentOCTAL_ESC : '\\' ('0'..'3') ('0'..'7') ('0'..'7') | '\\' ('0'..'7') ('0'..'7') | '\\' ('0'..'7') ;fragmentUNICODE_ESC : '\\' 'u' HEX_DIGIT HEX_DIGIT HEX_DIGIT HEX_DIGIT ; header : include*;include : INCLUDE;//'#include ' '<' ID ('.h' | '.ddl') '>'; |
可以将：
1 2 3 4 5 6 7 | #define SETVALUE(a) getValue(a+1)SETVALUE(2);#define GET_DEV_VAR_VALUE() _get_dev_var_value((a),(b),METHODID(c))GET_DEV_VAR_VALUE( ); |
处理为：
1 2 3 4 | getValue(2+1);_get_dev_var_value((a),(b),METHODID(c)); |
了。
转载请注明：在路上 » 【记录】让antlr的预处理，支持无参数的宏替换