RosettaCodeData/Task/Power-set/Phix/power-set-1.phix

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 <span style="color: #004080;">sequence</span> <span style="color: #000000;">powerset</span>
 <span style="color: #004080;">integer</span> <span style="color: #000000;">step</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">1</span>

 <span style="color: #008080;">function</span> <span style="color: #000000;">pst</span><span style="color: #0000FF;">(</span><span style="color: #004080;">object</span> <span style="color: #000000;">key</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">object</span> <span style="color: #000080;font-style:italic;">/*data*/</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">object</span> <span style="color: #000080;font-style:italic;">/*user_data*/</span><span style="color: #0000FF;">)</span>
     <span style="color: #004080;">integer</span> <span style="color: #000000;">k</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">1</span>
     <span style="color: #008080;">while</span> <span style="color: #000000;">k</span><span style="color: #0000FF;"><</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">powerset</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span>
         <span style="color: #000000;">k</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">step</span>
         <span style="color: #008080;">for</span> <span style="color: #000000;">j</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #000000;">step</span> <span style="color: #008080;">do</span>
             <span style="color: #000000;">powerset</span><span style="color: #0000FF;">[</span><span style="color: #000000;">k</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">append</span><span style="color: #0000FF;">(</span><span style="color: #000000;">powerset</span><span style="color: #0000FF;">[</span><span style="color: #000000;">k</span><span style="color: #0000FF;">],</span><span style="color: #000000;">key</span><span style="color: #0000FF;">)</span>
             <span style="color: #000000;">k</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">1</span>
         <span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
     <span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
     <span style="color: #000000;">step</span> <span style="color: #0000FF;">*=</span> <span style="color: #000000;">2</span>
     <span style="color: #008080;">return</span> <span style="color: #000000;">1</span>
 <span style="color: #008080;">end</span> <span style="color: #008080;">function</span>

 <span style="color: #008080;">function</span> <span style="color: #000000;">power_set</span><span style="color: #0000FF;">(</span><span style="color: #004080;">integer</span> <span style="color: #000000;">d</span><span style="color: #0000FF;">)</span>
     <span style="color: #000000;">powerset</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">repeat</span><span style="color: #0000FF;">({},</span><span style="color: #7060A8;">power</span><span style="color: #0000FF;">(</span><span style="color: #000000;">2</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">dict_size</span><span style="color: #0000FF;">(</span><span style="color: #000000;">d</span><span style="color: #0000FF;">)))</span>
     <span style="color: #000000;">step</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">1</span>
     <span style="color: #7060A8;">traverse_dict</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">routine_id</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"pst"</span><span style="color: #0000FF;">),</span><span style="color: #000000;">0</span><span style="color: #0000FF;">,</span><span style="color: #000000;">d</span><span style="color: #0000FF;">)</span>
     <span style="color: #008080;">return</span> <span style="color: #000000;">powerset</span>
 <span style="color: #008080;">end</span> <span style="color: #008080;">function</span>

 <span style="color: #004080;">integer</span> <span style="color: #000000;">d1234</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">new_dict</span><span style="color: #0000FF;">({{</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #000000;">0</span><span style="color: #0000FF;">},{</span><span style="color: #000000;">2</span><span style="color: #0000FF;">,</span><span style="color: #000000;">0</span><span style="color: #0000FF;">},{</span><span style="color: #000000;">3</span><span style="color: #0000FF;">,</span><span style="color: #000000;">0</span><span style="color: #0000FF;">},{</span><span style="color: #000000;">4</span><span style="color: #0000FF;">,</span><span style="color: #000000;">0</span><span style="color: #0000FF;">}})</span>
 <span style="color: #0000FF;">?</span><span style="color: #000000;">power_set</span><span style="color: #0000FF;">(</span><span style="color: #000000;">d1234</span><span style="color: #0000FF;">)</span>
 <span style="color: #004080;">integer</span> <span style="color: #000000;">d0</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">new_dict</span><span style="color: #0000FF;">()</span>
 <span style="color: #0000FF;">?</span><span style="color: #000000;">power_set</span><span style="color: #0000FF;">(</span><span style="color: #000000;">d0</span><span style="color: #0000FF;">)</span>
 <span style="color: #7060A8;">setd</span><span style="color: #0000FF;">({},</span><span style="color: #000000;">0</span><span style="color: #0000FF;">,</span><span style="color: #000000;">d0</span><span style="color: #0000FF;">)</span>
 <span style="color: #0000FF;">?</span><span style="color: #000000;">power_set</span><span style="color: #0000FF;">(</span><span style="color: #000000;">d0</span><span style="color: #0000FF;">)</span>
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