gstream-save_input_approver (3) Linux Manual Page
save_input_approver
Synopsis
#include <gstream.h> void save_input_approver();
Description
A typical use of the input approver system is to temporarily set a home-made approver, launch an input and then get the original settings back. Consequently there is a pair of functions to help you with that, save_input_approver and restore_input_approver.Saving will backup the currently used approver, so you can continue using it.
gs.save_input_approver();
gs >> my_string; // uses still default approver
gs.set_input_approver(ia_my_own);
gs >> my_string; // uses ia_my_own approver
gs.restore_input_approver();
gs >> my_string; // uses default approver again