main.sa

Java写的词法/语法分析器。可生成JAVA语言或者是C++的词法和语法分析器。并可产生语法分析树和对该树进行遍历

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 found\n";
	 return;
      end;

      protect
	 lexer  ::= #TINYC_LEXER{ANTLR_COMMON_TOKEN}( f );
	 parser ::= #MYC_PARSER{ANTLR_COMMON_TOKEN,ANTLR_COMMON_AST}( lexer );

	 parser.program;
	 
	 t ::= parser.ast;

	 #OUT + t.str_list + "\n";
	 
      when $ANTLR_RECOGNITION_EXCEPTION then
	 #ERR + "exception: " + exception.str + "\n";	 
      end;
      
   end;
end;