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Belt_Id.html
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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>
<li><a href="Dom.html">Dom</a></li>
<li><a href="Dom_storage.html">Dom_storage</a></li>
<li><a href="Dom_storage2.html">Dom_storage2</a></li>
<li><a href="Js.html">Js</a></li>
<li><a href="Js_array.html">Js_array</a></li>
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<li><a href="Js_cast.html">Js_cast</a></li>
<li><a href="Js_console.html">Js_console</a></li>
<li><a href="Js_date.html">Js_date</a></li>
<li><a href="Js_dict.html">Js_dict</a></li>
<li><a href="Js_exn.html">Js_exn</a></li>
<li><a href="Js_float.html">Js_float</a></li>
<li><a href="Js_global.html">Js_global</a></li>
<li><a href="Js_int.html">Js_int</a></li>
<li><a href="Js_json.html">Js_json</a></li>
<li><a href="Js_list.html">Js_list</a></li>
<li><a href="Js_mapperRt.html">Js_mapperRt</a></li>
<li><a href="Js_math.html">Js_math</a></li>
<li><a href="Js_null.html">Js_null</a></li>
<li><a href="Js_null_undefined.html">Js_null_undefined</a></li>
<li><a href="Js_obj.html">Js_obj</a></li>
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<li><a href="Js_string2.html">Js_string2</a></li>
<li><a href="Js_typed_array.html">Js_typed_array</a></li>
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<li><a href="Js_types.html">Js_types</a></li>
<li><a href="Js_undefined.html">Js_undefined</a></li>
<li><a href="Js_vector.html">Js_vector</a></li>
<li><a href="Node.html">Node</a></li>
<li><a href="Node_buffer.html">Node_buffer</a></li>
<li><a href="Node_child_process.html">Node_child_process</a></li>
<li><a href="Node_fs.html">Node_fs</a></li>
<li><a href="Node_module.html">Node_module</a></li>
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<li><a href="Node_process.html">Node_process</a></li></ul></nav>
<div class="navbar"><a class="pre" href="Belt_HashSetString.html" title="Belt_HashSetString">Previous</a>
<a class="up" href="index.html" title="Index">Up</a>
<a class="post" href="Belt_Int.html" title="Belt_Int">Next</a>
</div>
<h1>Module <a href="type_Belt_Id.html">Belt_Id</a></h1>
<pre><span class="keyword">module</span> Belt_Id: <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>
<p>
Provide utiliites to create identified comparators or hashes for
data structures used below.
<p>
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%">
<div class="type-declaration">
<pre><span id="TYPEhash"><span class="keyword">type</span> <code class="type">('a, 'id)</code> hash</span> </pre>
</div>
<div class="info ">
<div class="not-examples">
<code class="code">('a, 'id) hash</code>
<p>
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>
<div class="type-declaration">
<pre><span id="TYPEeq"><span class="keyword">type</span> <code class="type">('a, 'id)</code> eq</span> </pre>
</div>
<div class="info ">
<div class="not-examples">
<code class="code">('a, 'id) eq</code>
<p>
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>
<div class="type-declaration">
<pre><span id="TYPEcmp"><span class="keyword">type</span> <code class="type">('a, 'id)</code> cmp</span> </pre>
</div>
<div class="info ">
<div class="not-examples">
<code class="code">('a,'id) cmp</code>
<p>
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 class="keyword">module type</span> <a href="Belt_Id.Comparable.html">Comparable</a> = <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> <div class="type-declaration">
<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>
<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>.
<p>
Unlike normal functions, when created, it comes with a unique identity (guaranteed
by the type system).
<p>
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>.
<p>
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 class="keyword">module</span> <a href="Belt_Id.MakeComparableU.html">MakeComparableU</a>: <div class="sig_block"><code class="code">functor (</code><code class="code">M</code><code class="code"> : </code><code class="code">sig</code><div class="sig_block"><div class="type-declaration">
<pre><span id="TYPEt"><span class="keyword">type</span> <code class="type"></code>t</span> </pre>
</div>
<pre><span id="VALcmp"><span class="keyword">val</span> cmp</span> : <code class="type">(t -> t -> int [@bs])</code></pre></div><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 class="keyword">module</span> <a href="Belt_Id.MakeComparable.html">MakeComparable</a>: <div class="sig_block"><code class="code">functor (</code><code class="code">M</code><code class="code"> : </code><code class="code">sig</code><div class="sig_block"><div class="type-declaration">
<pre><span id="TYPEt"><span class="keyword">type</span> <code class="type"></code>t</span> </pre>
</div>
<pre><span id="VALcmp"><span class="keyword">val</span> cmp</span> : <code class="type">t -> t -> int</code></pre></div><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 class="keyword">module type</span> <a href="Belt_Id.Hashable.html">Hashable</a> = <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> <div class="type-declaration">
<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>
<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>.
<p>
Unlike normal functions, when created, it comes with a unique identity (guaranteed
by the type system).
<p>
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>.
<p>
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 class="keyword">module</span> <a href="Belt_Id.MakeHashableU.html">MakeHashableU</a>: <div class="sig_block"><code class="code">functor (</code><code class="code">M</code><code class="code"> : </code><code class="code">sig</code><div class="sig_block"><div class="type-declaration">
<pre><span id="TYPEt"><span class="keyword">type</span> <code class="type"></code>t</span> </pre>
</div>
<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><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 class="keyword">module</span> <a href="Belt_Id.MakeHashable.html">MakeHashable</a>: <div class="sig_block"><code class="code">functor (</code><code class="code">M</code><code class="code"> : </code><code class="code">sig</code><div class="sig_block"><div class="type-declaration">
<pre><span id="TYPEt"><span class="keyword">type</span> <code class="type"></code>t</span> </pre>
</div>
<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><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>