Multiton: Difference between revisions
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Multiton is Multiton{Float64}(1.0)
ERROR: LoadError: Cannot find a Multiton in registry with instance reference number 5
</pre>
=={{header|Phix}}==
{{libheader|Phix/Class}}
No attempt is made for thread safety, since multiple threads accessing these would need
their own locking anyway, not that it is difficult to invoke enter_cs() and leave_cs().<br>
I thought about adding a get_multiton() function to avoid calling new() all the time, but it would (probably/almost certainly) just invoke new() itself anyway.<br>
Put this in a separate file, to keep allowed and instances private. Classes are not [yet] supported under pwa/p2js.
<!--<lang Phix>(notonline)-->
<span style="color: #008080;">without</span> <span style="color: #008080;">javascript_semantics</span>
<span style="color: #004080;">sequence</span> <span style="color: #000000;">allowed</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #008000;">"zero"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"one"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"two"</span><span style="color: #0000FF;">},</span>
<span style="color: #000000;">instances</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #004600;">NULL</span><span style="color: #0000FF;">,</span><span style="color: #004600;">NULL</span><span style="color: #0000FF;">,</span><span style="color: #004600;">NULL</span><span style="color: #0000FF;">}</span>
<span style="color: #008080;">public</span> <span style="color: #008080;">class</span> <span style="color: #000000;">Multiton</span>
<span style="color: #008080;">public</span> <span style="color: #004080;">string</span> <span style="color: #000000;">id</span>
<span style="color: #008080;">function</span> <span style="color: #000000;">Multiton</span><span style="color: #0000FF;">(</span><span style="color: #004080;">string</span> <span style="color: #000000;">id</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: #7060A8;">find</span><span style="color: #0000FF;">(</span><span style="color: #000000;">id</span><span style="color: #0000FF;">,</span><span style="color: #000000;">allowed</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">k</span><span style="color: #0000FF;">=</span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span> <span style="color: #7060A8;">crash</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"not allowed"</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">instances</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: #004600;">NULL</span> <span style="color: #008080;">then</span>
<span style="color: #7060A8;">this</span><span style="color: #0000FF;">.</span><span style="color: #000000;">id</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">id</span><span style="color: #0000FF;">&</span><span style="color: #7060A8;">sprintf</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"_%d"</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">rand</span><span style="color: #0000FF;">(</span><span style="color: #000000;">999</span><span style="color: #0000FF;">))</span>
<span style="color: #000000;">instances</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;">this</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">return</span> <span style="color: #000000;">instances</span><span style="color: #0000FF;">[</span><span style="color: #000000;">k</span><span style="color: #0000FF;">]</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">class</span>
<span style="color: #000000;">Multiton</span> <span style="color: #000000;">a</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">new</span><span style="color: #0000FF;">({</span><span style="color: #008000;">"zero"</span><span style="color: #0000FF;">}),</span>
<span style="color: #000000;">b</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">new</span><span style="color: #0000FF;">({</span><span style="color: #008000;">"one"</span><span style="color: #0000FF;">}),</span>
<span style="color: #000000;">c</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">new</span><span style="color: #0000FF;">({</span><span style="color: #008000;">"two"</span><span style="color: #0000FF;">}),</span>
<span style="color: #000000;">d</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">new</span><span style="color: #0000FF;">({</span><span style="color: #008000;">"zero"</span><span style="color: #0000FF;">}),</span>
<span style="color: #000080;font-style:italic;">-- e = new(), -- crashes
-- f = new({"three"}) -- crashes</span>
<span style="color: #000000;">e</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">new</span><span style="color: #0000FF;">({</span><span style="color: #008000;">"one"</span><span style="color: #0000FF;">}),</span>
<span style="color: #000000;">f</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">new</span><span style="color: #0000FF;">({</span><span style="color: #008000;">"two"</span><span style="color: #0000FF;">})</span>
<span style="color: #0000FF;">?</span><span style="color: #000000;">a</span><span style="color: #0000FF;">.</span><span style="color: #000000;">id</span>
<span style="color: #0000FF;">?</span><span style="color: #000000;">b</span><span style="color: #0000FF;">.</span><span style="color: #000000;">id</span>
<span style="color: #0000FF;">?</span><span style="color: #000000;">c</span><span style="color: #0000FF;">.</span><span style="color: #000000;">id</span>
<span style="color: #0000FF;">?</span><span style="color: #000000;">d</span><span style="color: #0000FF;">.</span><span style="color: #000000;">id</span>
<span style="color: #0000FF;">?</span><span style="color: #000000;">e</span><span style="color: #0000FF;">.</span><span style="color: #000000;">id</span>
<span style="color: #0000FF;">?</span><span style="color: #000000;">f</span><span style="color: #0000FF;">.</span><span style="color: #000000;">id</span>
<!--</lang>-->
{{out}}
<pre>
"zero_651"
"one_111"
"two_544"
"zero_651"
"one_111"
"two_544"
</pre>
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