/**
 * JavaCC file
 */
 
options {
  JDK_VERSION = "1.4";
}
PARSER_BEGIN(RasMolParser)

package org.simtk.parse.rasmol;

public class RasMolParser {
  public static void main(String args[]) throws ParseException {
    RasMolParser parser = new RasMolParser(System.in);
    System.out.println("Reading from standard input...");
    System.out.print("Enter an atom expression :");
    try {
      RasMolParser.one_command();
    } catch (Exception e) {
      System.out.println("NOK.");
      System.out.println(e.getMessage());
      RasMolParser.ReInit(System.in);
    } catch (Error e) {
      System.out.println("Oops.");
      System.out.println(e.getMessage());
    }
  }
}
PARSER_END(RasMolParser)

SKIP :
{
 	" "
|	"\r"
|	"\t"
|	"\n"
}
TOKEN :
{
    < CONSTANT: ( <DIGIT> )+ >
|   < #DIGIT: ["0" - "9"] >
}

//
// Start of comment. Don't return as token, instead
// shift to special lexical state.
//
SPECIAL_TOKEN: {  <"#"> : WithinComment }

//
// While inside the comment lexicals state, look for end
// of comment (either another '--' or EOL). Don't return
// the (accumulated data). Instead switch back to normal
// lexical state
//
<WithinComment> SPECIAL_TOKEN:
{
    <"\n"> : DEFAULT
}

//
// While inside the comment state, accumulate all contents
//
<WithinComment> MORE: { <~[]> }

int one_command() : {}
{
  RASMOL_COMMAND() <EOF> { return 0; }
}

void RASMOL_COMMAND() : {}
{
	ATOM_EXPRESSION()
}

void COMPOUND_RASMOL_COMMAND() : {}
{
	RASMOL_COMMAND() ";" COMPOUND_RASMOL_COMMAND()
}

void ATOM_EXPRESSION() : {}
{
	<CONSTANT>
}