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<html xmlns="http://www.w3.org/1999/xhtml"><head><title>Head (ocaml.Patterns.Head)</title><link rel="stylesheet" href="../../../_odoc-theme/odoc.css"/><meta charset="utf-8"/><meta name="generator" content="odoc 2.2.1"/><meta name="viewport" content="width=device-width,initial-scale=1.0"/><script src="../../../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">ocaml</a> » <a href="../index.html">Patterns</a> » Head</nav><header class="odoc-preamble"><h1>Module <code><span>Patterns.Head</span></code></h1></header><div class="odoc-content"><div class="odoc-spec"><div class="spec type anchored" id="type-desc"><a href="#type-desc" class="anchor"></a><code><span><span class="keyword">type</span> desc</span><span> = </span></code><ol><li id="type-desc.Any" class="def variant constructor anchored"><a href="#type-desc.Any" class="anchor"></a><code><span>| </span><span><span class="constructor">Any</span></span></code></li><li id="type-desc.Construct" class="def variant constructor anchored"><a href="#type-desc.Construct" class="anchor"></a><code><span>| </span><span><span class="constructor">Construct</span> <span class="keyword">of</span> <a href="../../Types/index.html#type-constructor_description">Types.constructor_description</a></span></code></li><li id="type-desc.Constant" class="def variant constructor anchored"><a href="#type-desc.Constant" class="anchor"></a><code><span>| </span><span><span class="constructor">Constant</span> <span class="keyword">of</span> <a href="../../Asttypes/index.html#type-constant">Asttypes.constant</a></span></code></li><li id="type-desc.Tuple" class="def variant constructor anchored"><a href="#type-desc.Tuple" class="anchor"></a><code><span>| </span><span><span class="constructor">Tuple</span> <span class="keyword">of</span> int</span></code></li><li id="type-desc.Record" class="def variant constructor anchored"><a href="#type-desc.Record" class="anchor"></a><code><span>| </span><span><span class="constructor">Record</span> <span class="keyword">of</span> <span><a href="../../Types/index.html#type-label_description">Types.label_description</a> list</span></span></code></li><li id="type-desc.Variant" class="def variant constructor anchored"><a href="#type-desc.Variant" class="anchor"></a><code><span>| </span><span><span class="constructor">Variant</span> <span class="keyword">of</span> </span><span>{</span></code><ol><li id="type-desc.tag" class="def record field anchored"><a href="#type-desc.tag" class="anchor"></a><code><span>tag : <a href="../../Asttypes/index.html#type-label">Asttypes.label</a>;</span></code></li><li id="type-desc.has_arg" class="def record field anchored"><a href="#type-desc.has_arg" class="anchor"></a><code><span>has_arg : bool;</span></code></li><li id="type-desc.cstr_row" class="def record field anchored"><a href="#type-desc.cstr_row" class="anchor"></a><code><span>cstr_row : <span><a href="../../Types/index.html#type-row_desc">Types.row_desc</a> <a href="../../Stdlib/index.html#type-ref">ref</a></span>;</span></code></li><li id="type-desc.type_row" class="def record field anchored"><a href="#type-desc.type_row" class="anchor"></a><code><span>type_row : <span>unit <span class="arrow">-></span></span> <a href="../../Types/index.html#type-row_desc">Types.row_desc</a>;</span></code></li></ol><code><span>}</span></code></li><li id="type-desc.Array" class="def variant constructor anchored"><a href="#type-desc.Array" class="anchor"></a><code><span>| </span><span><span class="constructor">Array</span> <span class="keyword">of</span> int</span></code></li><li id="type-desc.Lazy" class="def variant constructor anchored"><a href="#type-desc.Lazy" class="anchor"></a><code><span>| </span><span><span class="constructor">Lazy</span></span></code></li></ol></div></div><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> t</span><span> = <span><a href="#type-desc">desc</a> <a href="../../Typedtree/index.html#type-pattern_data">Typedtree.pattern_data</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-arity"><a href="#val-arity" class="anchor"></a><code><span><span class="keyword">val</span> arity : <span><a href="#type-t">t</a> <span class="arrow">-></span></span> int</span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-deconstruct"><a href="#val-deconstruct" class="anchor"></a><code><span><span class="keyword">val</span> deconstruct : <span><a href="../Simple/index.html#type-pattern">Simple.pattern</a> <span class="arrow">-></span></span> <a href="#type-t">t</a> * <span><a href="../../Typedtree/index.html#type-pattern">Typedtree.pattern</a> list</span></span></code></div><div class="spec-doc"><p><code>deconstruct p</code> returns the head of <code>p</code> and the list of sub patterns.</p><ul class="at-tags"><li class="raises"><span class="at-tag">raises</span> <span class="value">[Invalid_arg</span> <p>_] if <code>p</code> is an or- or an exception-pattern.</p></li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-to_omega_pattern"><a href="#val-to_omega_pattern" class="anchor"></a><code><span><span class="keyword">val</span> to_omega_pattern : <span><a href="#type-t">t</a> <span class="arrow">-></span></span> <a href="../../Typedtree/index.html#type-pattern">Typedtree.pattern</a></span></code></div><div class="spec-doc"><p>reconstructs a pattern, putting wildcards as sub-patterns.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-omega"><a href="#val-omega" class="anchor"></a><code><span><span class="keyword">val</span> omega : <a href="#type-t">t</a></span></code></div></div></div></body></html> |