_14_15_3_37_1_1_1_15_5-bb"></a><span class="identifier">get_period</span><span class="special">(</span><span class="identifier">stream_itr_type</span> <span class="special">&amp;</span> sitr<span class="special">,</span> <span class="identifier">stream_itr_type</span> <span class="special">&amp;</span> stream_end<span class="special">,</span> 
                         <span class="identifier">std</span><span class="special">::</span><span class="identifier">ios_base</span> <span class="special">&amp;</span>