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<html xmlns="http://www.w3.org/1999/xhtml"><head><title>Expert (ppxlib.Ppxlib.Extension.Expert)</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">Extension</a> » Expert</nav><header class="odoc-preamble"><h1>Module <code><span>Extension.Expert</span></code></h1><p>This module allows to declare extensions that do not produce a value of the context type. This is typically useful for extensions point that depends on more things from the context than the path and location.</p></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> <span>('context, 'payload) t</span></span></code></div><div class="spec-doc"><p>Type of declared expert extensions.</p><p>The <code>'context</code> type parameter describes where the extension is expected and the <code>'payload</code> one what its payload should contain.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-declare"><a href="#val-declare" class="anchor"></a><code><span><span class="keyword">val</span> declare :
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<span>string <span class="arrow">-></span></span>
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<span><span><span class="type-var">'context</span> <a href="../Context/index.html#type-t">Context.t</a></span> <span class="arrow">-></span></span>
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<span><span><span>(<a href="../../../Astlib/Ast_502/Parsetree/index.html#type-payload">Astlib.Ast_502.Parsetree.payload</a>, <span class="type-var">'a</span>, <span class="type-var">'b</span>)</span> <a href="../../Ast_pattern/index.html#type-t">Ast_pattern.t</a></span> <span class="arrow">-></span></span>
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<span><span class="type-var">'a</span> <span class="arrow">-></span></span>
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<span><span>(<span class="type-var">'context</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-declare_with_path_arg"><a href="#val-declare_with_path_arg" class="anchor"></a><code><span><span class="keyword">val</span> declare_with_path_arg :
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<span>string <span class="arrow">-></span></span>
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<span><span><span class="type-var">'context</span> <a href="../Context/index.html#type-t">Context.t</a></span> <span class="arrow">-></span></span>
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<span><span><span>(<a href="../../../Astlib/Ast_502/Parsetree/index.html#type-payload">Astlib.Ast_502.Parsetree.payload</a>, <span class="type-var">'a</span>, <span class="type-var">'b</span>)</span> <a href="../../Ast_pattern/index.html#type-t">Ast_pattern.t</a></span> <span class="arrow">-></span></span>
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<span><span>(<span><span class="label">arg</span>:<span><span><a href="../../Longident/index.html#type-t">Longident.t</a> <a href="../../Loc/index.html#type-t">Loc.t</a></span> option</span> <span class="arrow">-></span></span> <span class="type-var">'a</span>)</span> <span class="arrow">-></span></span>
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<span><span>(<span class="type-var">'context</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-convert_res"><a href="#val-convert_res" class="anchor"></a><code><span><span class="keyword">val</span> convert_res :
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<span><span><span><span>(<span class="type-var">_</span>, <span class="type-var">'a</span>)</span> <a href="#type-t">t</a></span> list</span> <span class="arrow">-></span></span>
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<span><span class="label">loc</span>:<a href="../../Location/index.html#type-t">Location.t</a> <span class="arrow">-></span></span>
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<span><span>(<span>string <a href="../../../Astlib/Location/index.html#type-loc">Astlib.Location.loc</a></span> * <a href="../../../Astlib/Ast_502/Parsetree/index.html#type-payload">Astlib.Ast_502.Parsetree.payload</a>)</span> <span class="arrow">-></span></span>
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<span><span>(<span><span class="type-var">'a</span> option</span>, <span><a href="../../Location/Error/index.html#type-t">Location.Error.t</a> <a href="../../../Stdppx/NonEmptyList/index.html#type-t">Stdppx.NonEmptyList.t</a></span>)</span> <a href="../../../../ocaml/Stdlib/index.html#type-result">result</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-convert"><a href="#val-convert" class="anchor"></a><code><span><span class="keyword">val</span> convert :
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<span><span><span><span>(<span class="type-var">_</span>, <span class="type-var">'a</span>)</span> <a href="#type-t">t</a></span> list</span> <span class="arrow">-></span></span>
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<span><span class="label">loc</span>:<a href="../../Location/index.html#type-t">Location.t</a> <span class="arrow">-></span></span>
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<span><span>(<span>string <a href="../../../Astlib/Location/index.html#type-loc">Astlib.Location.loc</a></span> * <a href="../../../Astlib/Ast_502/Parsetree/index.html#type-payload">Astlib.Ast_502.Parsetree.payload</a>)</span> <span class="arrow">-></span></span>
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<span><span class="type-var">'a</span> option</span></span></code></div></div></div></body></html>
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