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124 lines
5.3 KiB
HTML
124 lines
5.3 KiB
HTML
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<title>Overloading support for Ada (Debugging with GDB)</title>
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<meta name="description" content="Overloading support for Ada (Debugging with GDB)">
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<meta name="keywords" content="Overloading support for Ada (Debugging with GDB)">
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<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Ada.html#Ada" rel="up" title="Ada">
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<a name="Overloading-support-for-Ada"></a>
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<div class="header">
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<p>
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Next: <a href="Stopping-Before-Main-Program.html#Stopping-Before-Main-Program" accesskey="n" rel="next">Stopping Before Main Program</a>, Previous: <a href="Additions-to-Ada.html#Additions-to-Ada" accesskey="p" rel="prev">Additions to Ada</a>, Up: <a href="Ada.html#Ada" accesskey="u" rel="up">Ada</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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</div>
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<hr>
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<a name="Overloading-support-for-Ada-1"></a>
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<h4 class="subsubsection">15.4.10.4 Overloading support for Ada</h4>
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<a name="index-overloading_002c-Ada"></a>
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<p>The debugger supports limited overloading. Given a subprogram call in which
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the function symbol has multiple definitions, it will use the number of
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actual parameters and some information about their types to attempt to narrow
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the set of definitions. It also makes very limited use of context, preferring
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procedures to functions in the context of the <code>call</code> command, and
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functions to procedures elsewhere.
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</p>
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<p>If, after narrowing, the set of matching definitions still contains more than
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one definition, <small>GDB</small> will display a menu to query which one it should
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use, for instance:
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</p>
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<div class="smallexample">
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<pre class="smallexample">(gdb) print f(1)
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Multiple matches for f
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[0] cancel
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[1] foo.f (integer) return boolean at foo.adb:23
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[2] foo.f (foo.new_integer) return boolean at foo.adb:28
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>
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</pre></div>
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<p>In this case, just select one menu entry either to cancel expression evaluation
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(type <kbd>0</kbd> and press <tt class="key">RET</tt>) or to continue evaluation with a specific
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instance (type the corresponding number and press <tt class="key">RET</tt>).
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</p>
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<p>Here are a couple of commands to customize <small>GDB</small>’s behavior in this
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case:
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</p>
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<dl compact="compact">
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<dd>
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<a name="index-set-ada-print_002dsignatures"></a>
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</dd>
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<dt><code>set ada print-signatures</code></dt>
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<dd><p>Control whether parameter types and return types are displayed in overloads
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selection menus. It is <code>on</code> by default.
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See <a href="#Overloading-support-for-Ada">Overloading support for Ada</a>.
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</p>
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<a name="index-show-ada-print_002dsignatures"></a>
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</dd>
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<dt><code>show ada print-signatures</code></dt>
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<dd><p>Show the current setting for displaying parameter types and return types in
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overloads selection menu.
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See <a href="#Overloading-support-for-Ada">Overloading support for Ada</a>.
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</p>
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</dd>
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</dl>
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</body>
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</html>
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