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Simon Cruanes 500c31d9bf doc for 3.4
2021-05-03 13:35:10 -04:00

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<html xmlns="http://www.w3.org/1999/xhtml"><head><title>CCEqual (containers.CCEqual)</title><link rel="stylesheet" href="../../odoc.css"/><meta charset="utf-8"/><meta name="generator" content="odoc 1.5.1"/><meta name="viewport" content="width=device-width,initial-scale=1.0"/><script src="../../highlight.pack.js"></script><script>hljs.initHighlightingOnLoad();</script></head><body><div class="content"><header><nav><a href="../index.html">Up</a> – <a href="../index.html">containers</a> &#x00BB; CCEqual</nav><h1>Module <code>CCEqual</code></h1><h2 id="equality-combinators"><a href="#equality-combinators" class="anchor"></a>Equality Combinators</h2></header><aside><dl><dt>since</dt><dd>1.2</dd></dl></aside><dl><dt class="spec type" id="type-t"><a href="#type-t" class="anchor"></a><code><span class="keyword">type</span> <span>'a t</span></code><code> = <span class="type-var">'a</span> <span>&#45;&gt;</span> <span class="type-var">'a</span> <span>&#45;&gt;</span> bool</code></dt><dd><p>Equality function. Must be transitive, symmetric, and reflexive.</p></dd></dl><dl><dt class="spec value" id="val-poly"><a href="#val-poly" class="anchor"></a><code><span class="keyword">val</span> poly : <span><span class="type-var">'a</span> <a href="index.html#type-t">t</a></span></code></dt><dd><p>Standard polymorphic equality.</p></dd></dl><dl><dt class="spec value" id="val-physical"><a href="#val-physical" class="anchor"></a><code><span class="keyword">val</span> physical : <span><span class="type-var">'a</span> <a href="index.html#type-t">t</a></span></code></dt><dd><p>Standard physical equality.</p><dl><dt>since</dt><dd>2.0</dd></dl></dd></dl><dl><dt class="spec value" id="val-int"><a href="#val-int" class="anchor"></a><code><span class="keyword">val</span> int : <span>int <a href="index.html#type-t">t</a></span></code></dt><dt class="spec value" id="val-string"><a href="#val-string" class="anchor"></a><code><span class="keyword">val</span> string : <span>string <a href="index.html#type-t">t</a></span></code></dt><dt class="spec value" id="val-bool"><a href="#val-bool" class="anchor"></a><code><span class="keyword">val</span> bool : <span>bool <a href="index.html#type-t">t</a></span></code></dt><dt class="spec value" id="val-float"><a href="#val-float" class="anchor"></a><code><span class="keyword">val</span> float : <span>float <a href="index.html#type-t">t</a></span></code></dt><dt class="spec value" id="val-unit"><a href="#val-unit" class="anchor"></a><code><span class="keyword">val</span> unit : <span>unit <a href="index.html#type-t">t</a></span></code></dt><dt class="spec value" id="val-list"><a href="#val-list" class="anchor"></a><code><span class="keyword">val</span> list : <span><span class="type-var">'a</span> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> <span><span><span class="type-var">'a</span> list</span> <a href="index.html#type-t">t</a></span></code></dt><dt class="spec value" id="val-array"><a href="#val-array" class="anchor"></a><code><span class="keyword">val</span> array : <span><span class="type-var">'a</span> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> <span><span><span class="type-var">'a</span> array</span> <a href="index.html#type-t">t</a></span></code></dt><dt class="spec value" id="val-option"><a href="#val-option" class="anchor"></a><code><span class="keyword">val</span> option : <span><span class="type-var">'a</span> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> <span><span><span class="type-var">'a</span> option</span> <a href="index.html#type-t">t</a></span></code></dt><dt class="spec value" id="val-pair"><a href="#val-pair" class="anchor"></a><code><span class="keyword">val</span> pair : <span><span class="type-var">'a</span> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> <span><span class="type-var">'b</span> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> <span><span>(<span class="type-var">'a</span> * <span class="type-var">'b</span>)</span> <a href="index.html#type-t">t</a></span></code></dt><dt class="spec value" id="val-triple"><a href="#val-triple" class="anchor"></a><code><span class="keyword">val</span> triple : <span><span class="type-var">'a</span> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> <span><span class="type-var">'b</span> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> <span><span class="type-var">'c</span> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> <span><span>(<span class="type-var">'a</span> * <span class="type-var">'b</span> * <span class="type-var">'c</span>)</span> <a href="index.html#type-t">t</a></span></code></dt><dt class="spec value" id="val-map"><a href="#val-map" class="anchor"></a><code><span class="keyword">val</span> map : <span>(<span class="type-var">'a</span> <span>&#45;&gt;</span> <span class="type-var">'b</span>)</span> <span>&#45;&gt;</span> <span><span class="type-var">'b</span> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> <span><span class="type-var">'a</span> <a href="index.html#type-t">t</a></span></code></dt><dd><p><code>map f eq</code> is the equality function that, given objects <code>x</code> and <code>y</code>, projects <code>x</code> and <code>y</code> using <code>f</code> (e.g. using a record field) and then compares those projections with <code>eq</code>. Example: <code>map fst int</code> compares values of type <code>(int * 'a)</code> by their first component.</p></dd></dl><dl><dt class="spec value" id="val-always_eq"><a href="#val-always_eq" class="anchor"></a><code><span class="keyword">val</span> always_eq : <span><span class="type-var">_</span> <a href="index.html#type-t">t</a></span></code></dt><dd><p>Always returns true. All values are equal.</p><dl><dt>since</dt><dd>3.0</dd></dl></dd></dl><dl><dt class="spec value" id="val-never_eq"><a href="#val-never_eq" class="anchor"></a><code><span class="keyword">val</span> never_eq : <span><span class="type-var">_</span> <a href="index.html#type-t">t</a></span></code></dt><dd><p>Always returns false. No values are, so this is not even reflexive (i.e. <code>x=x</code> is false). Be careful!</p><dl><dt>since</dt><dd>3.0</dd></dl></dd></dl><div class="spec module" id="module-Infix"><a href="#module-Infix" class="anchor"></a><code><span class="keyword">module</span> <a href="Infix/index.html">Infix</a> : <span class="keyword">sig</span> ... <span class="keyword">end</span></code></div><div><div class="spec include"><div class="doc"><details open="open"><summary><span class="def"><code><span class="keyword">include</span> <span class="keyword">module</span> <span class="keyword">type</span> <span class="keyword">of</span> <a href="index.html#module-Infix">Infix</a></code></span></summary><dl><dt class="spec value" id="val-(&gt;|=)"><a href="#val-(&gt;|=)" class="anchor"></a><code><span class="keyword">val</span> (&gt;|=) : <span><span class="type-var">'b</span> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> <span>(<span class="type-var">'a</span> <span>&#45;&gt;</span> <span class="type-var">'b</span>)</span> <span>&#45;&gt;</span> <span><span class="type-var">'a</span> <a href="index.html#type-t">t</a></span></code></dt><dd><p>Infix equivalent of <a href="index.html#val-map"><code>map</code></a>.</p></dd></dl></details></div></div></div></div></body></html>
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