/*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
/// <summary>Add a single terminal to the set.
/// </summary>
/// <param name="sym">the terminal being added.
/// </param>
/// <returns>true if this changes the set.
///
/// </returns>
public virtual 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;
}
/*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
/// <summary>Add a single terminal to the set.
/// </summary>
/// <param name="sym">the terminal being added.
/// </param>
/// <returns>true if this changes the set.
///
/// </returns>
public virtual 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);
}
/*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
/// <summary>Determine if the set contains a particular terminal.
/// </summary>
/// <param name="sym">the terminal symbol we are looking for.
///
/// </param>
public virtual bool contains(terminal sym)
{
not_null(sym);
return(_elements.Get(sym.index()));
}
/*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
/// <summary>Remove a terminal if it is in the set.
/// </summary>
/// <param name="sym">the terminal being removed.
///
/// </param>
public virtual void remove(terminal sym)
{
not_null(sym);
_elements.Set(sym.index(), false);
}
/*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
/// <summary>Remove a terminal if it is in the set.
/// </summary>
/// <param name="sym">the terminal being removed.
///
/// </param>
public virtual void remove(terminal sym)
{
not_null(sym);
_elements.Set(sym.index(), false);
}
/*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
/// <summary>Determine if the set contains a particular terminal.
/// </summary>
/// <param name="sym">the terminal symbol we are looking for.
///
/// </param>
public virtual bool contains(terminal sym)
{
not_null(sym);
return _elements.Get(sym.index());
}