// Do not use this templated function directly.  Use the macro below instead.
template<int> int cancelable_get_line_autohist_temp(char *buf, int len)
{
    static input_history hist(10);
    return cancelable_get_line(buf, len, get_number_of_cols(), &hist);
}
// This version of cancelable_get_line will automatically retain its own
// input history, independent of other calls to cancelable_get_line.
#define cancelable_get_line_autohist(buf, len) \
    cancelable_get_line_autohist_temp<__LINE__>(buf, len)

// Do not use this templated function directly.  Use the macro below instead.
template<int> static int cancelable_get_line_autohist_temp(char *buf, int len)
{
    static input_history hist(10);
    return cancelable_get_line(buf, len, get_number_of_cols(), &hist);
}
// This version of cancelable_get_line will automatically retain its own
// input history, independent of other calls to cancelable_get_line.
#define cancelable_get_line_autohist(buf, len) \
    cancelable_get_line_autohist_temp<__LINE__>(buf, len)