132 lines
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HTML
132 lines
8 KiB
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<!-- This manual documents Guile version 3.0.10.
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Copyright (C) 1996-1997, 2000-2005, 2009-2023 Free Software Foundation,
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Inc.
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Copyright (C) 2021 Maxime Devos
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Copyright (C) 2024 Tomas Volf
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Permission is granted to copy, distribute and/or modify this document
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copy of the license is included in the section entitled "GNU Free
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<title>rnrs records inspection (Guile Reference Manual)</title>
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<body lang="en">
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<div class="subsubsection-level-extent" id="rnrs-records-inspection">
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<div class="nav-panel">
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<p>
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Next: <a href="rnrs-exceptions.html" accesskey="n" rel="next">rnrs exceptions</a>, Previous: <a href="rnrs-records-procedural.html" accesskey="p" rel="prev">rnrs records procedural</a>, Up: <a href="R6RS-Standard-Libraries.html" accesskey="u" rel="up">R6RS Standard Libraries</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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</div>
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<hr>
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<h4 class="subsubsection" id="rnrs-records-inspection-1"><span>7.6.2.11 rnrs records inspection<a class="copiable-link" href="#rnrs-records-inspection-1"> ¶</a></span></h4>
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<p>The <code class="code">(rnrs records inspection (6))</code> library provides procedures
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useful for accessing metadata about R6RS records.
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</p>
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<dl class="first-deffn">
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<dt class="deffn" id="index-record_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">record?</strong> <var class="def-var-arguments">obj</var><a class="copiable-link" href="#index-record_003f-1"> ¶</a></span></dt>
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<dd><p>Return <code class="code">#t</code> if the specified object is a non-opaque R6RS record,
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<code class="code">#f</code> otherwise.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-record_002drtd"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">record-rtd</strong> <var class="def-var-arguments">record</var><a class="copiable-link" href="#index-record_002drtd"> ¶</a></span></dt>
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<dd><p>Returns the record-type descriptor for <var class="var">record</var>. An
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<code class="code">&assertion</code> is raised if <var class="var">record</var> is opaque.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-record_002dtype_002dname-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">record-type-name</strong> <var class="def-var-arguments">rtd</var><a class="copiable-link" href="#index-record_002dtype_002dname-1"> ¶</a></span></dt>
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<dd><p>Returns the name of the record-type descriptor <var class="var">rtd</var>.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-record_002dtype_002dparent"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">record-type-parent</strong> <var class="def-var-arguments">rtd</var><a class="copiable-link" href="#index-record_002dtype_002dparent"> ¶</a></span></dt>
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<dd><p>Returns the parent of the record-type descriptor <var class="var">rtd</var>, or <code class="code">#f</code>
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if it has none.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-record_002dtype_002duid"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">record-type-uid</strong> <var class="def-var-arguments">rtd</var><a class="copiable-link" href="#index-record_002dtype_002duid"> ¶</a></span></dt>
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<dd><p>Returns the uid of the record-type descriptor <var class="var">rtd</var>, or <code class="code">#f</code> if
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it has none.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-record_002dtype_002dgenerative_003f"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">record-type-generative?</strong> <var class="def-var-arguments">rtd</var><a class="copiable-link" href="#index-record_002dtype_002dgenerative_003f"> ¶</a></span></dt>
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<dd><p>Returns <code class="code">#t</code> if the record-type descriptor <var class="var">rtd</var> is generative,
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<code class="code">#f</code> otherwise.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-record_002dtype_002dsealed_003f"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">record-type-sealed?</strong> <var class="def-var-arguments">rtd</var><a class="copiable-link" href="#index-record_002dtype_002dsealed_003f"> ¶</a></span></dt>
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<dd><p>Returns <code class="code">#t</code> if the record-type descriptor <var class="var">rtd</var> is sealed,
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<code class="code">#f</code> otherwise.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-record_002dtype_002dopaque_003f"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">record-type-opaque?</strong> <var class="def-var-arguments">rtd</var><a class="copiable-link" href="#index-record_002dtype_002dopaque_003f"> ¶</a></span></dt>
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<dd><p>Returns <code class="code">#t</code> if the record-type descriptor <var class="var">rtd</var> is opaque,
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<code class="code">#f</code> otherwise.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-record_002dtype_002dfield_002dnames"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">record-type-field-names</strong> <var class="def-var-arguments">rtd</var><a class="copiable-link" href="#index-record_002dtype_002dfield_002dnames"> ¶</a></span></dt>
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<dd><p>Returns a vector of symbols giving the names of the fields defined by
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the record-type descriptor <var class="var">rtd</var> (and not any of its sub- or
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supertypes).
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-record_002dfield_002dmutable_003f"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">record-field-mutable?</strong> <var class="def-var-arguments">rtd k</var><a class="copiable-link" href="#index-record_002dfield_002dmutable_003f"> ¶</a></span></dt>
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<dd><p>Returns <code class="code">#t</code> if the field at index <var class="var">k</var> of the record-type
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descriptor <var class="var">rtd</var> (and not any of its sub- or supertypes) is mutable.
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</p></dd></dl>
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</div>
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<hr>
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<div class="nav-panel">
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<p>
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Next: <a href="rnrs-exceptions.html">rnrs exceptions</a>, Previous: <a href="rnrs-records-procedural.html">rnrs records procedural</a>, Up: <a href="R6RS-Standard-Libraries.html">R6RS Standard Libraries</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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</div>
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