main.sa
上传用户:afrynkmhm
上传日期:2007-01-06
资源大小:1262k
文件大小:1k
- class MAIN is
- main ( args : ARRAY{STR} ) is
- if ( args.size < 2 ) then
- #OUT + "usage " + args[0] + " <filename>n";
- return;
- end;
-
- f : IFSTREAM := IFSTREAM::open_for_read( args[1] );
- if ( void(f) ) then
- #OUT + "file "" + args[1] + "" not foundn";
- return;
- end;
- protect
- lexer ::= #CALC_LEXER{ANTLR_COMMON_TOKEN}( f );
- parser ::= #CALC_PARSER{ANTLR_COMMON_TOKEN, $CALC_AST}( lexer );
- parser.expr;
-
- t : $CALC_AST := parser.ast;
- #OUT + t.str_tree + "n";
-
- #OUT + "value is " + t.val + "n";
- when $ANTLR_RECOGNITION_EXCEPTION then
- #ERR + "exception: " + exception.str + "n";
- end;
-
- end;
- end;