/*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
/** Add a single terminal to the Set.
* @param sym the terminal being added.
* @return true if this changes the Set.
*/
public bool add(terminal sym)
{
bool result;
not_null(sym);
/* see if we already have this */
result = _elements.Get(sym.index());
/* if not we add it */
if (!result)
{
_elements.Set(sym.index(), true);
}
return(result);
}
/*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
/** Determine if the Set contains a particular terminal.
* @param sym the terminal symbol we are looking for.
*/
public bool contains(terminal sym)
{
not_null(sym);
return(_elements.Get(sym.index()));
}
/*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
/** Remove a terminal if it is in the Set.
* @param sym the terminal being removed.
*/
public void remove(terminal sym)
{
not_null(sym);
_elements.Set(sym.index(), false);
}
/*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
/** Determine if the Set contains a particular terminal.
* @param sym the terminal symbol we are looking for.
*/
public bool contains(terminal sym)
{
not_null(sym);
return _elements.Get(sym.index());
}
/*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
/** Remove a terminal if it is in the Set.
* @param sym the terminal being removed.
*/
public void remove(terminal sym)
{
not_null(sym);
_elements.Set(sym.index(),false);
}
/*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
/** Add a single terminal to the Set.
* @param sym the terminal being added.
* @return true if this changes the Set.
*/
public bool add(terminal sym)
{
bool result;
not_null(sym);
/* see if we already have this */
result = _elements.Get(sym.index());
/* if not we add it */
if (!result)
_elements.Set(sym.index(),true);
return result;
}
