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<title>Debugging with GDB: Guile Types Module</title>
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<a name="Guile-Types-Module"></a>
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<p>
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Previous: <a href="Guile-Printing-Module.html#Guile-Printing-Module" accesskey="p" rel="previous">Guile Printing Module</a>, Up: <a href="Guile-Modules.html#Guile-Modules" accesskey="u" rel="up">Guile Modules</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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<a name="Guile-Types-Module-1"></a>
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<h4 class="subsubsection">23.3.5.2 Guile Types Module</h4>
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<p>This module provides a collection of utilities for working with
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<code><gdb:type></code> objects.
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</p>
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<p>Usage:
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</p>
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<div class="smallexample">
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<pre class="smallexample">(use-modules (gdb types))
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</pre></div>
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<dl>
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<dt><a name="index-get_002dbasic_002dtype"></a>Scheme Procedure: <strong>get-basic-type</strong> <em>type</em></dt>
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<dd><p>Return <var>type</var> with const and volatile qualifiers stripped,
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and with typedefs and C<tt>++</tt> references converted to the underlying type.
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</p>
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<p>C<tt>++</tt> example:
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</p>
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<div class="smallexample">
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<pre class="smallexample">typedef const int const_int;
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const_int foo (3);
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const_int& foo_ref (foo);
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int main () { return 0; }
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</pre></div>
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<p>Then in gdb:
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</p>
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<div class="smallexample">
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<pre class="smallexample">(gdb) start
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(gdb) guile (use-modules (gdb) (gdb types))
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(gdb) guile (define foo-ref (parse-and-eval "foo_ref"))
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(gdb) guile (get-basic-type (value-type foo-ref))
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int
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</pre></div>
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</dd></dl>
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<dl>
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<dt><a name="index-type_002dhas_002dfield_002ddeep_003f"></a>Scheme Procedure: <strong>type-has-field-deep?</strong> <em>type field</em></dt>
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<dd><p>Return <code>#t</code> if <var>type</var>, assumed to be a type with fields
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(e.g., a structure or union), has field <var>field</var>.
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Otherwise return <code>#f</code>.
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This searches baseclasses, whereas <code>type-has-field?</code> does not.
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</p></dd></dl>
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<dl>
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<dt><a name="index-make_002denum_002dhashtable"></a>Scheme Procedure: <strong>make-enum-hashtable</strong> <em>enum-type</em></dt>
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<dd><p>Return a Guile hash table produced from <var>enum-type</var>.
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Elements in the hash table are referenced with <code>hashq-ref</code>.
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</p></dd></dl>
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