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comparison core/src/luan/impl/LuanParser.java @ 326:db37d6aee4db

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remove try-catch statement; add Luan.try() and Luan.pcall(); git-svn-id: https://luan-java.googlecode.com/svn/trunk@327 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Thu, 19 Mar 2015 00:01:57 +0000
parents b24a35612947
children 5e34702423a0
comparison
equal deleted inserted replaced
325:78a6a71afbfd 326:db37d6aee4db
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=BreakStmt()) != null 252 || (stmt=BreakStmt()) != null
253 || (stmt=ForStmt()) != null 253 || (stmt=ForStmt()) != null
254 || (stmt=TryStmt()) != null
255 || (stmt=DoStmt()) != null 254 || (stmt=DoStmt()) != null
256 || (stmt=WhileStmt()) != null 255 || (stmt=WhileStmt()) != null
257 || (stmt=FunctionStmt()) != null 256 || (stmt=FunctionStmt()) != null
258 || (stmt=RepeatStmt()) != null 257 || (stmt=RepeatStmt()) != null
259 || (stmt=IfStmt()) != null 258 || (stmt=IfStmt()) != null
368 addSymbols(names); 367 addSymbols(names);
369 Stmt loop = RequiredLoopBlock(); 368 Stmt loop = RequiredLoopBlock();
370 RequiredKeyword("end",In.NOTHING); 369 RequiredKeyword("end",In.NOTHING);
371 Stmt stmt = new ForStmt( se(start), stackStart, symbolsSize() - stackStart, expr, loop ); 370 Stmt stmt = new ForStmt( se(start), stackStart, symbolsSize() - stackStart, expr, loop );
372 popSymbols( symbolsSize() - stackStart ); 371 popSymbols( symbolsSize() - stackStart );
373 return parser.success(stmt);
374 }
375
376 private Stmt TryStmt() throws ParseException {
377 parser.begin();
378 if( !Keyword("try",In.NOTHING) )
379 return parser.failure(null);
380 Stmt tryBlock = RequiredBlock();
381 RequiredKeyword("catch",In.NOTHING);
382 String name = RequiredName(In.NOTHING);
383 addSymbol(name);
384 RequiredKeyword("do",In.NOTHING);
385 Stmt catchBlock = RequiredBlock();
386 RequiredKeyword("end",In.NOTHING);
387 Stmt stmt = new TryStmt( tryBlock, symbolsSize()-1, catchBlock );
388 popSymbols(1);
389 return parser.success(stmt); 372 return parser.success(stmt);
390 } 373 }
391 374
392 private Stmt DoStmt() throws ParseException { 375 private Stmt DoStmt() throws ParseException {
393 parser.begin(); 376 parser.begin();
1093 } 1076 }
1094 1077
1095 private static final Set<String> keywords = new HashSet<String>(Arrays.asList( 1078 private static final Set<String> keywords = new HashSet<String>(Arrays.asList(
1096 "and", 1079 "and",
1097 "break", 1080 "break",
1098 "catch",
1099 "do", 1081 "do",
1100 "else", 1082 "else",
1101 "elseif", 1083 "elseif",
1102 "end", 1084 "end",
1103 "false", 1085 "false",
1112 "or", 1094 "or",
1113 "repeat", 1095 "repeat",
1114 "return", 1096 "return",
1115 "then", 1097 "then",
1116 "true", 1098 "true",
1117 "try",
1118 "until", 1099 "until",
1119 "while" 1100 "while"
1120 )); 1101 ));
1121 1102
1122 private Expr Literal(In in) throws ParseException { 1103 private Expr Literal(In in) throws ParseException {