91 lines
4.2 KiB
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91 lines
4.2 KiB
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<title>Overloading support for Ada - Debugging with GDB</title>
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<div class="node">
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<a name="Overloading-support-for-Ada"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Stopping-Before-Main-Program.html#Stopping-Before-Main-Program">Stopping Before Main Program</a>,
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Previous: <a rel="previous" accesskey="p" href="Additions-to-Ada.html#Additions-to-Ada">Additions to Ada</a>,
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Up: <a rel="up" accesskey="u" href="Ada.html#Ada">Ada</a>
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</div>
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<h5 class="subsubsection">15.4.10.4 Overloading support for Ada</h5>
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<p><a name="index-overloading_002c-Ada-1065"></a>
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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>If, after narrowing, the set of matching definitions still contains more than
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one definition, <span class="sc">gdb</span> will display a menu to query which one it should
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use, for instance:
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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>
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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 <RET>) or to continue evaluation with a specific
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instance (type the corresponding number and press <RET>).
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<p>Here are a couple of commands to customize <span class="sc">gdb</span>'s behavior in this
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case:
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<a name="index-set-ada-print_002dsignatures-1066"></a>
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<dl><dt><code>set ada print-signatures</code><dd>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.html#Overloading-support-for-Ada">Overloading support for Ada</a>.
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<p><a name="index-show-ada-print_002dsignatures-1067"></a><br><dt><code>show ada print-signatures</code><dd>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.html#Overloading-support-for-Ada">Overloading support for Ada</a>.
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</dl>
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</body></html>
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