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comparison core/src/luan/impl/LuanParser.java @ 321:7f7708e8fdd4

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remove import statement git-svn-id: https://luan-java.googlecode.com/svn/trunk@322 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Sun, 08 Feb 2015 07:26:20 +0000
parents fed1893821bf
children b24a35612947
comparison
equal deleted inserted replaced
320:fed1893821bf 321:7f7708e8fdd4
247 return; 247 return;
248 Stmt stmt; 248 Stmt stmt;
249 if( (stmt=ReturnStmt()) != null 249 if( (stmt=ReturnStmt()) != null
250 || (stmt=FunctionStmt()) != null 250 || (stmt=FunctionStmt()) != null
251 || (stmt=LocalFunctionStmt()) != null 251 || (stmt=LocalFunctionStmt()) != null
252 || (stmt=ImportStmt()) != null
253 || (stmt=JavaStmt()) != null
254 || (stmt=BreakStmt()) != null 252 || (stmt=BreakStmt()) != null
255 || (stmt=ForStmt()) != null 253 || (stmt=ForStmt()) != null
256 || (stmt=TryStmt()) != null 254 || (stmt=TryStmt()) != null
257 || (stmt=DoStmt()) != null 255 || (stmt=DoStmt()) != null
258 || (stmt=WhileStmt()) != null 256 || (stmt=WhileStmt()) != null
344 return parser.failure(null); 342 return parser.failure(null);
345 String name = RequiredName(In.NOTHING); 343 String name = RequiredName(In.NOTHING);
346 addSymbol( name ); 344 addSymbol( name );
347 FnDef fnDef = RequiredFunction(In.NOTHING); 345 FnDef fnDef = RequiredFunction(In.NOTHING);
348 return parser.success( new SetStmt( new SetLocalVar(symbolsSize()-1), fnDef ) ); 346 return parser.success( new SetStmt( new SetLocalVar(symbolsSize()-1), fnDef ) );
349 }
350
351 private Stmt ImportStmt() throws ParseException {
352 int start = parser.begin();
353 if( !Keyword("import",In.NOTHING) )
354 return parser.failure(null);
355 String modName = StringLiteral(In.NOTHING);
356 if( modName==null )
357 return parser.failure(null);
358 int i = modName.lastIndexOf('/');
359 if( i == -1 )
360 i = modName.lastIndexOf('.');
361 if( i == -1 )
362 i = modName.lastIndexOf(':');
363 String varName = modName.substring(i+1);
364 if( !isValidName(varName) )
365 throw parser.exception("invalid variable name '"+varName+"' in import");
366 LuanSource.Element se = se(start);
367 FnCall require = new FnCall( se, new ConstExpr(se,PackageLuan.requireFn), new ConstExpr(se(start,modName),modName) );
368 Settable settable;
369 if( interactive ) {
370 settable = nameVar(se,varName).settable();
371 } else {
372 addSymbol( varName );
373 settable = new SetLocalVar(symbolsSize()-1);
374 }
375 return parser.success( new SetStmt( settable, expr(require) ) );
376 }
377
378 private boolean isValidName(String s) {
379 if( s.length() == 0 )
380 return false;
381 char c = s.charAt(0);
382 if( !('a'<=c && c<='z' || 'A'<=c && c<='Z' || c=='_') )
383 return false;
384 for( int i=1; i<s.length() ; i++ ) {
385 if( !('a'<=c && c<='z' || 'A'<=c && c<='Z' || c=='_' || '0'<=c && c<='9') )
386 return false;
387 }
388 return true;
389 }
390
391 private Stmt JavaStmt() throws ParseException {
392 parser.begin();
393 if( !Keyword("java",In.NOTHING) )
394 return parser.failure(null);
395 return parser.success( new JavaStmt() );
396 } 347 }
397 348
398 private Stmt BreakStmt() throws ParseException { 349 private Stmt BreakStmt() throws ParseException {
399 parser.begin(); 350 parser.begin();
400 if( !Keyword("break",In.NOTHING) ) 351 if( !Keyword("break",In.NOTHING) )
1152 "false", 1103 "false",
1153 "for", 1104 "for",
1154 "function", 1105 "function",
1155 "goto", 1106 "goto",
1156 "if", 1107 "if",
1157 "import",
1158 "in", 1108 "in",
1159 "java",
1160 "local", 1109 "local",
1161 "nil", 1110 "nil",
1162 "not", 1111 "not",
1163 "or", 1112 "or",
1164 "repeat", 1113 "repeat",