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<html xmlns="http://www.w3.org/1999/xhtml"><head><title>CCEqual (containers.CCEqual)</title><meta charset="utf-8"/><link rel="stylesheet" href="../../odoc.support/odoc.css"/><meta name="generator" content="odoc 2.4.3"/><meta name="viewport" content="width=device-width,initial-scale=1.0"/><script src="../../odoc.support/highlight.pack.js"></script><script>hljs.initHighlightingOnLoad();</script></head><body class="odoc"><nav class="odoc-nav"><a href="../index.html">Up</a> <a href="../index.html">containers</a> &#x00BB; CCEqual</nav><header class="odoc-preamble"><h1>Module <code><span>CCEqual</span></code></h1><p>Equality Combinators</p></header><div class="odoc-content"><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 1.2</li></ul><div class="odoc-spec"><div class="spec type anchored" id="type-t"><a href="#type-t" class="anchor"></a><code><span><span class="keyword">type</span> <span>'a t</span></span><span> = <span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> bool</span></code></div><div class="spec-doc"><p>Equality function. Must be transitive, symmetric, and reflexive.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-poly"><a href="#val-poly" class="anchor"></a><code><span><span class="keyword">val</span> poly : <span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p>Standard polymorphic equality.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-physical"><a href="#val-physical" class="anchor"></a><code><span><span class="keyword">val</span> physical : <span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p>Standard physical equality.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 2.0</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-int"><a href="#val-int" class="anchor"></a><code><span><span class="keyword">val</span> int : <span>int <a href="#type-t">t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-string"><a href="#val-string" class="anchor"></a><code><span><span class="keyword">val</span> string : <span>string <a href="#type-t">t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-bool"><a href="#val-bool" class="anchor"></a><code><span><span class="keyword">val</span> bool : <span>bool <a href="#type-t">t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-float"><a href="#val-float" class="anchor"></a><code><span><span class="keyword">val</span> float : <span>float <a href="#type-t">t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-unit"><a href="#val-unit" class="anchor"></a><code><span><span class="keyword">val</span> unit : <span>unit <a href="#type-t">t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-list"><a href="#val-list" class="anchor"></a><code><span><span class="keyword">val</span> list : <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <a href="#type-t">t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-array"><a href="#val-array" class="anchor"></a><code><span><span class="keyword">val</span> array : <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> array</span> <a href="#type-t">t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-option"><a href="#val-option" class="anchor"></a><code><span><span class="keyword">val</span> option : <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> option</span> <a href="#type-t">t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-pair"><a href="#val-pair" class="anchor"></a><code><span><span class="keyword">val</span> pair : <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'b</span> <a href="#type-t">t</a></span> <span class="arrow">&#45;&gt;</span></span> <span><span>(<span class="type-var">'a</span> * <span class="type-var">'b</span>)</span> <a href="#type-t">t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-triple"><a href="#val-triple" class="anchor"></a><code><span><span class="keyword">val</span> triple : <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'b</span> <a href="#type-t">t</a></span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'c</span> <a href="#type-t">t</a></span> <span class="arrow">&#45;&gt;</span></span> <span><span>(<span class="type-var">'a</span> * <span class="type-var">'b</span> * <span class="type-var">'c</span>)</span> <a href="#type-t">t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-map"><a href="#val-map" class="anchor"></a><code><span><span class="keyword">val</span> map : <span><span>(<span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span class="type-var">'b</span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'b</span> <a href="#type-t">t</a></span> <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><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></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-always_eq"><a href="#val-always_eq" class="anchor"></a><code><span><span class="keyword">val</span> always_eq : <span><span class="type-var">_</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p>Always returns true. All values are equal.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 3.0</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-never_eq"><a href="#val-never_eq" class="anchor"></a><code><span><span class="keyword">val</span> never_eq : <span><span class="type-var">_</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p>Always returns false. No values are, so this is not even reflexive (i.e. <code>x=x</code> is false). Be careful!</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 3.0</li></ul></div></div><div class="odoc-spec"><div class="spec module anchored" id="module-Infix"><a href="#module-Infix" class="anchor"></a><code><span><span class="keyword">module</span> <a href="Infix/index.html">Infix</a></span><span> : <span class="keyword">sig</span> ... <span class="keyword">end</span></span></code></div></div><div class="odoc-include"><details open="open"><summary class="spec include"><code><span><span class="keyword">include</span> <span class="keyword">module</span> <span class="keyword">type</span> <span class="keyword">of</span> <a href="Infix/index.html">Infix</a></span></code></summary><div class="odoc-spec"><div class="spec value anchored" id="val-(&gt;|=)"><a href="#val-(&gt;|=)" class="anchor"></a><code><span><span class="keyword">val</span> (&gt;|=) : <span><span><span class="type-var">'b</span> <a href="#type-t">t</a></span> <span class="arrow">&#45;&gt;</span></span> <span><span>(<span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span class="type-var">'b</span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p>Infix equivalent of <a href="#val-map"><code>map</code></a>.</p></div></div></details></div></div></body></html>