[antlr-interest] parsing same file more than once

[Mach Ray]

Dear all,

I want to parse the same file multiple times,
depending on the number of input arguments. The input
file name is an extern variable defined in the
grammar. Here is a segment of the main function. 

// ...
if (frules.substr(frules.find('.')) == ".rules"){

ifstream infile (frules.c_str(), ios::in);
if( !infile.is_open() ){
   cerr << "Error in opening the conversion rules
file"      << endl;
   return 1;
}
			   
for( int i = 2; i < argc; i++ ){
   xml_file = argv[i]; // a global variable

   XML2OWLLexer lexer(std::cin);
   XML2OWLParser parser(lexer);
   LexerSharedInputState lex_state =  
lexer.getInputState();
   lex_state->initialize(infile, frules.c_str());
   
   parser.getInputState()->reset();
   parser.setFilename(frules);
   
   parser.file();
// ...

The first execution of the for loop is witout any
error. During the second execution, the parse throws
the following error
cont.rules:1:1: unexpected end of file

Thanks
Mach

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