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<html xmlns="http://www.w3.org/1999/xhtml"><head><title>Instrument (ppxlib.Ppxlib.Driver.Instrument)</title><meta charset="utf-8"/><link rel="stylesheet" href="../../../../_odoc-theme/odoc.css"/><meta name="generator" content="odoc 3.1.0"/><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">Index</a> » <a href="../../../index.html">ppxlib</a> » <a href="../../index.html">Ppxlib</a> » <a href="../index.html">Driver</a> » Instrument</nav><header class="odoc-preamble"><h1>Module <code><span>Driver.Instrument</span></code></h1></header><div class="odoc-content"><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></code></div></div><div class="odoc-spec"><div class="spec type anchored" id="type-pos"><a href="#type-pos" class="anchor"></a><code><span><span class="keyword">type</span> pos</span><span> = </span></code><ol><li id="type-pos.Before" class="def variant constructor anchored"><a href="#type-pos.Before" class="anchor"></a><code><span>| </span><span><span class="constructor">Before</span></span></code></li><li id="type-pos.After" class="def variant constructor anchored"><a href="#type-pos.After" class="anchor"></a><code><span>| </span><span><span class="constructor">After</span></span></code></li></ol></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-make"><a href="#val-make" class="anchor"></a><code><span><span class="keyword">val</span> make :
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<span><span>(<span><a href="../../../Astlib/Ast_502/Parsetree/index.html#type-structure">Ppxlib_ast.Parsetree.structure</a> <span class="arrow">-></span></span> <a href="../../../Astlib/Ast_502/Parsetree/index.html#type-structure">Ppxlib_ast.Parsetree.structure</a>)</span> <span class="arrow">-></span></span>
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<span><span class="label">position</span>:<a href="#type-pos">pos</a> <span class="arrow">-></span></span>
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<a href="#type-t">t</a></span></code></div><div class="spec-doc"><p><code>make transformation ~position</code> creates an instrumentation that can be passed to <code>Driver.register_transformation</code> to instrument an implementation file. <code>transformation</code> is the transformation that will be applied to the AST; <code>position</code> specifies if it should be applied before or after rewriters defined through <code>rules</code>, <code>impl</code> or <code>intf</code> are applied.</p></div></div><div class="odoc-spec"><div class="spec module anchored" id="module-V2"><a href="#module-V2" class="anchor"></a><code><span><span class="keyword">module</span> <a href="V2/index.html">V2</a></span><span> : <span class="keyword">sig</span> ... <span class="keyword">end</span></span></code></div></div></div></body></html>
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