75 lines
3.6 KiB
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75 lines
3.6 KiB
HTML
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Copyright (C) 2021 Maxime Devos
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Copyright (C) 2024 Tomas Volf
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<title>Reader Extensions (Guile Reference Manual)</title>
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<div class="subsubsection-level-extent" id="Reader-Extensions">
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Previous: <a href="Keyword-Syntax.html" accesskey="p" rel="prev">Keyword Syntax</a>, Up: <a href="Scheme-Syntax.html" accesskey="u" rel="up">Scheme Syntax: Standard and Guile Extensions</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html" title="Index" rel="index">Index</a>]</p>
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<h4 class="subsubsection" id="Reader-Extensions-1"><span>6.16.1.6 Reader Extensions<a class="copiable-link" href="#Reader-Extensions-1"> ¶</a></span></h4>
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<dl class="first-deffn">
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<dt class="deffn" id="index-read_002dhash_002dextend"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">read-hash-extend</strong> <var class="def-var-arguments">chr proc</var><a class="copiable-link" href="#index-read_002dhash_002dextend"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fread_005fhash_005fextend"><span class="category-def">C Function: </span><span><strong class="def-name">scm_read_hash_extend</strong> <var class="def-var-arguments">(chr, proc)</var><a class="copiable-link" href="#index-scm_005fread_005fhash_005fextend"> ¶</a></span></dt>
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<dd><p>Install the procedure <var class="var">proc</var> for reading expressions
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starting with the character sequence <code class="code">#</code> and <var class="var">chr</var>.
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<var class="var">proc</var> will be called with two arguments: the character
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<var class="var">chr</var> and the port to read further data from. The object
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returned will be the return value of <code class="code">read</code>.
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Passing <code class="code">#f</code> for <var class="var">proc</var> will remove a previous setting.
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</p>
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</dd></dl>
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