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<!doctype html>
<html>
<head>
<link rel="stylesheet" href="../api_static/tomorrow-night.css">
<link rel="stylesheet" href="../api_static/style.css" type="text/css">
<script src="../api_static//highlight.pack.js"></script>
<script src="../api_static//script.js"></script>
<script>hljs.initHighlightingOnLoad();</script>
<meta charset="utf8">
<link rel="previous" href="Belt_HashSetString.html"><link rel="next" href="Belt_Int.html">
<title> Belt_Id </title></head>
<body>
<nav class="module-index"><ul><li><a href="Belt.html">Belt</a></li>
<li><a href="Belt_Array.html">Belt_Array</a></li>
<li><a href="Belt_Debug.html">Belt_Debug</a></li>
<li><a href="Belt_Float.html">Belt_Float</a></li>
<li><a href="Belt_HashMap.html">Belt_HashMap</a></li>
<li><a href="Belt_HashMapInt.html">Belt_HashMapInt</a></li>
<li><a href="Belt_HashMapString.html">Belt_HashMapString</a></li>
<li><a href="Belt_HashSet.html">Belt_HashSet</a></li>
<li><a href="Belt_HashSetInt.html">Belt_HashSetInt</a></li>
<li><a href="Belt_HashSetString.html">Belt_HashSetString</a></li>
<li><a href="Belt_Id.html">Belt_Id</a></li>
<li><a href="Belt_Int.html">Belt_Int</a></li>
<li><a href="Belt_List.html">Belt_List</a></li>
<li><a href="Belt_Map.html">Belt_Map</a></li>
<li><a href="Belt_MapDict.html">Belt_MapDict</a></li>
<li><a href="Belt_MapInt.html">Belt_MapInt</a></li>
<li><a href="Belt_MapString.html">Belt_MapString</a></li>
<li><a href="Belt_MutableMap.html">Belt_MutableMap</a></li>
<li><a href="Belt_MutableMapInt.html">Belt_MutableMapInt</a></li>
<li><a href="Belt_MutableMapString.html">Belt_MutableMapString</a></li>
<li><a href="Belt_MutableQueue.html">Belt_MutableQueue</a></li>
<li><a href="Belt_MutableSet.html">Belt_MutableSet</a></li>
<li><a href="Belt_MutableSetInt.html">Belt_MutableSetInt</a></li>
<li><a href="Belt_MutableSetString.html">Belt_MutableSetString</a></li>
<li><a href="Belt_MutableStack.html">Belt_MutableStack</a></li>
<li><a href="Belt_Option.html">Belt_Option</a></li>
<li><a href="Belt_Range.html">Belt_Range</a></li>
<li><a href="Belt_Result.html">Belt_Result</a></li>
<li><a href="Belt_Set.html">Belt_Set</a></li>
<li><a href="Belt_SetDict.html">Belt_SetDict</a></li>
<li><a href="Belt_SetInt.html">Belt_SetInt</a></li>
<li><a href="Belt_SetString.html">Belt_SetString</a></li>
<li><a href="Belt_SortArray.html">Belt_SortArray</a></li>
<li><a href="Belt_SortArrayInt.html">Belt_SortArrayInt</a></li>
<li><a href="Belt_SortArrayString.html">Belt_SortArrayString</a></li>
<li><a href="Belt_internalAVLset.html">Belt_internalAVLset</a></li>
<li><a href="Belt_internalAVLtree.html">Belt_internalAVLtree</a></li>
<li><a href="Belt_internalBuckets.html">Belt_internalBuckets</a></li>
<li><a href="Belt_internalBucketsType.html">Belt_internalBucketsType</a></li>
<li><a href="Belt_internalMapInt.html">Belt_internalMapInt</a></li>
<li><a href="Belt_internalMapString.html">Belt_internalMapString</a></li>
<li><a href="Belt_internalSetBuckets.html">Belt_internalSetBuckets</a></li>
<li><a href="Belt_internalSetInt.html">Belt_internalSetInt</a></li>
<li><a href="Belt_internalSetString.html">Belt_internalSetString</a></li>
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</div>
<h1>Module <a href="type_Belt_Id.html">Belt_Id</a></h1>
<pre><span id="MODULEBelt_Id"><span class="keyword">module</span> Belt_Id</span>: <code class="code">sig</code> <a href="Belt_Id.html">..</a> <code class="code">end</code></pre><div class="info module top">
<div class="not-examples">
<a href="Belt.Id.html"><code class="code">Belt.Id</code></a>
Provide utiliites to create identified comparators or hashes for
data structures used below.
It create a unique identifer per module of functions so that different data structures with slightly different
comparison functions won't mix.<br>
</div>
</div>
<hr width="100%">
<pre><span id="TYPEhash"><span class="keyword">type</span> <code class="type">('a, 'id)</code> hash</span> </pre>
<div class="info ">
<div class="not-examples">
<code class="code">('a, 'id) hash</code>
Its runtime represenation is a <code class="code">hash</code> function, but signed with a
type parameter, so that different hash functions type mismatch<br>
</div>
</div>
<pre><span id="TYPEeq"><span class="keyword">type</span> <code class="type">('a, 'id)</code> eq</span> </pre>
<div class="info ">
<div class="not-examples">
<code class="code">('a, 'id) eq</code>
Its runtime represenation is an <code class="code">eq</code> function, but signed with a
type parameter, so that different hash functions type mismatch<br>
</div>
</div>
<pre><span id="TYPEcmp"><span class="keyword">type</span> <code class="type">('a, 'id)</code> cmp</span> </pre>
<div class="info ">
<div class="not-examples">
<code class="code">('a,'id) cmp</code>
Its runtime representation is a <code class="code">cmp</code> function, but signed with a
type parameter, so that different hash functions type mismatch<br>
</div>
</div>
<pre><span id="MODULETYPEComparable"><span class="keyword">module type</span> <a href="Belt_Id.Comparable.html">Comparable</a></span> = <code class="code">sig</code> <a href="Belt_Id.Comparable.html">..</a> <code class="code">end</code></pre> <div class="info">
<div class="not-examples">
</div>
</div>
<pre><span id="TYPEcomparable"><span class="keyword">type</span> <code class="type">('key, 'id)</code> comparable</span> = <code class="type">(module Belt_Id.Comparable with type identity = 'id and type t = 'key)</code> </pre>
<div class="info ">
<div class="not-examples">
<code class="code">('key, 'id) cmparable</code> is a module of functions, here it only includes <code class="code">cmp</code>.
Unlike normal functions, when created, it comes with a unique identity (guaranteed
by the type system).
It can be created using function <a href="Belt_Id.html#VALcomparableU"><code class="code">Belt_Id.comparableU</code></a> or<a href="Belt_Id.html#VALcomparable"><code class="code">Belt_Id.comparable</code></a>.
The idea of a unique identity when created is that it makes sure two sets would type
mismatch if they use different comparison function<br>
</div>
</div>
<pre><span id="MODULEMakeComparableU"><span class="keyword">module</span> <a href="Belt_Id.MakeComparableU.html">MakeComparableU</a></span>: <div class="sig_block"><code class="code">functor (</code><code class="code">M</code><code class="code"> : </code><code class="code">sig</code></pre><div class="sig_block">
<pre><span id="TYPEt"><span class="keyword">type</span> <code class="type"></code>t</span> </pre>
<pre><span id="VALcmp"><span class="keyword">val</span> cmp</span> : <code class="type">(t -> t -> int [@bs])</code></pre></div><pre><code class="code">end</code><code class="code">) -> </code><code class="type"><a href="Belt_Id.Comparable.html">Comparable</a></code><code class="type"> with type t = M.t</code></div></pre> <div class="info">
<div class="not-examples">
</div>
</div>
<pre><span id="MODULEMakeComparable"><span class="keyword">module</span> <a href="Belt_Id.MakeComparable.html">MakeComparable</a></span>: <div class="sig_block"><code class="code">functor (</code><code class="code">M</code><code class="code"> : </code><code class="code">sig</code></pre><div class="sig_block">
<pre><span id="TYPEt"><span class="keyword">type</span> <code class="type"></code>t</span> </pre>
<pre><span id="VALcmp"><span class="keyword">val</span> cmp</span> : <code class="type">t -> t -> int</code></pre></div><pre><code class="code">end</code><code class="code">) -> </code><code class="type"><a href="Belt_Id.Comparable.html">Comparable</a></code><code class="type"> with type t = M.t</code></div></pre> <div class="info">
<div class="not-examples">
</div>
</div>
<pre><span id="VALcomparableU"><span class="keyword">val</span> comparableU</span> : <code class="type">cmp:('a -> 'a -> int [@bs]) -> (module Belt_Id.Comparable with type t = 'a)</code></pre>
<pre><span id="VALcomparable"><span class="keyword">val</span> comparable</span> : <code class="type">cmp:('a -> 'a -> int) -> (module Belt_Id.Comparable with type t = 'a)</code></pre>
<pre><span id="MODULETYPEHashable"><span class="keyword">module type</span> <a href="Belt_Id.Hashable.html">Hashable</a></span> = <code class="code">sig</code> <a href="Belt_Id.Hashable.html">..</a> <code class="code">end</code></pre> <div class="info">
<div class="not-examples">
</div>
</div>
<pre><span id="TYPEhashable"><span class="keyword">type</span> <code class="type">('key, 'id)</code> hashable</span> = <code class="type">(module Belt_Id.Hashable with type identity = 'id and type t = 'key)</code> </pre>
<div class="info ">
<div class="not-examples">
<code class="code">('key, 'id) hashable</code> is a module of functions, here it only includes <code class="code">hash</code>, <code class="code">eq</code>.
Unlike normal functions, when created, it comes with a unique identity (guaranteed
by the type system).
It can be created using function <a href="Belt_Id.html#VALhashableU"><code class="code">Belt_Id.hashableU</code></a> or <a href="Belt_Id.html#VALhashable"><code class="code">Belt_Id.hashable</code></a>.
The idea of a unique identity when created is that it makes sure two hash sets would type
mismatch if they use different comparison function<br>
</div>
</div>
<pre><span id="MODULEMakeHashableU"><span class="keyword">module</span> <a href="Belt_Id.MakeHashableU.html">MakeHashableU</a></span>: <div class="sig_block"><code class="code">functor (</code><code class="code">M</code><code class="code"> : </code><code class="code">sig</code></pre><div class="sig_block">
<pre><span id="TYPEt"><span class="keyword">type</span> <code class="type"></code>t</span> </pre>
<pre><span id="VALhash"><span class="keyword">val</span> hash</span> : <code class="type">(t -> int [@bs])</code></pre>
<pre><span id="VALeq"><span class="keyword">val</span> eq</span> : <code class="type">(t -> t -> bool [@bs])</code></pre></div><pre><code class="code">end</code><code class="code">) -> </code><code class="type"><a href="Belt_Id.Hashable.html">Hashable</a></code><code class="type"> with type t = M.t</code></div></pre> <div class="info">
<div class="not-examples">
</div>
</div>
<pre><span id="MODULEMakeHashable"><span class="keyword">module</span> <a href="Belt_Id.MakeHashable.html">MakeHashable</a></span>: <div class="sig_block"><code class="code">functor (</code><code class="code">M</code><code class="code"> : </code><code class="code">sig</code></pre><div class="sig_block">
<pre><span id="TYPEt"><span class="keyword">type</span> <code class="type"></code>t</span> </pre>
<pre><span id="VALhash"><span class="keyword">val</span> hash</span> : <code class="type">t -> int</code></pre>
<pre><span id="VALeq"><span class="keyword">val</span> eq</span> : <code class="type">t -> t -> bool</code></pre></div><pre><code class="code">end</code><code class="code">) -> </code><code class="type"><a href="Belt_Id.Hashable.html">Hashable</a></code><code class="type"> with type t = M.t</code></div></pre> <div class="info">
<div class="not-examples">
</div>
</div>
<pre><span id="VALhashableU"><span class="keyword">val</span> hashableU</span> : <code class="type">hash:('a -> int [@bs]) -><br> eq:('a -> 'a -> bool [@bs]) -> (module Belt_Id.Hashable with type t = 'a)</code></pre>
<pre><span id="VALhashable"><span class="keyword">val</span> hashable</span> : <code class="type">hash:('a -> int) -><br> eq:('a -> 'a -> bool) -> (module Belt_Id.Hashable with type t = 'a)</code></pre></body></html>