/// <summary>
/// Validate an if expression.
/// </summary>
/// <param name="ifex">
/// is the if expression. </param>
/// <returns> null. </returns>
public virtual object visit(IfExpr ifex)
{
visitExprs(ifex.iterator());
ifex.then_clause().accept(this);
ifex.else_clause().accept(this);
return(null);
}
///
/// <param name="ifex">
/// is the 'if' expression. </param>
/// <returns> ifex expression. </returns>
public virtual object visit(IfExpr ifex)
{
for (IEnumerator <Expr> i = ifex.iterator(); i.MoveNext();)
{
i.Current.accept(this);
}
ifex.then_clause().accept(this);
ifex.else_clause().accept(this);
return(ifex);
}
