You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
124 lines
5.3 KiB
HTML
124 lines
5.3 KiB
HTML
4 years ago
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
||
|
<html>
|
||
|
<!-- Copyright (C) 1988-2019 Free Software Foundation, Inc.
|
||
|
|
||
|
Permission is granted to copy, distribute and/or modify this document
|
||
|
under the terms of the GNU Free Documentation License, Version 1.3 or
|
||
|
any later version published by the Free Software Foundation; with the
|
||
|
Invariant Sections being "Free Software" and "Free Software Needs
|
||
|
Free Documentation", with the Front-Cover Texts being "A GNU Manual,"
|
||
|
and with the Back-Cover Texts as in (a) below.
|
||
|
|
||
|
(a) The FSF's Back-Cover Text is: "You are free to copy and modify
|
||
|
this GNU Manual. Buying copies from GNU Press supports the FSF in
|
||
|
developing GNU and promoting software freedom." -->
|
||
|
<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
|
||
|
<head>
|
||
|
<title>Overloading support for Ada (Debugging with GDB)</title>
|
||
|
|
||
|
<meta name="description" content="Overloading support for Ada (Debugging with GDB)">
|
||
|
<meta name="keywords" content="Overloading support for Ada (Debugging with GDB)">
|
||
|
<meta name="resource-type" content="document">
|
||
|
<meta name="distribution" content="global">
|
||
|
<meta name="Generator" content="makeinfo">
|
||
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
||
|
<link href="index.html#Top" rel="start" title="Top">
|
||
|
<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
|
||
|
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
|
||
|
<link href="Ada.html#Ada" rel="up" title="Ada">
|
||
|
<link href="Stopping-Before-Main-Program.html#Stopping-Before-Main-Program" rel="next" title="Stopping Before Main Program">
|
||
|
<link href="Additions-to-Ada.html#Additions-to-Ada" rel="prev" title="Additions to Ada">
|
||
|
<style type="text/css">
|
||
|
<!--
|
||
|
a.summary-letter {text-decoration: none}
|
||
|
blockquote.indentedblock {margin-right: 0em}
|
||
|
blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
|
||
|
blockquote.smallquotation {font-size: smaller}
|
||
|
div.display {margin-left: 3.2em}
|
||
|
div.example {margin-left: 3.2em}
|
||
|
div.lisp {margin-left: 3.2em}
|
||
|
div.smalldisplay {margin-left: 3.2em}
|
||
|
div.smallexample {margin-left: 3.2em}
|
||
|
div.smalllisp {margin-left: 3.2em}
|
||
|
kbd {font-style: oblique}
|
||
|
pre.display {font-family: inherit}
|
||
|
pre.format {font-family: inherit}
|
||
|
pre.menu-comment {font-family: serif}
|
||
|
pre.menu-preformatted {font-family: serif}
|
||
|
pre.smalldisplay {font-family: inherit; font-size: smaller}
|
||
|
pre.smallexample {font-size: smaller}
|
||
|
pre.smallformat {font-family: inherit; font-size: smaller}
|
||
|
pre.smalllisp {font-size: smaller}
|
||
|
span.nolinebreak {white-space: nowrap}
|
||
|
span.roman {font-family: initial; font-weight: normal}
|
||
|
span.sansserif {font-family: sans-serif; font-weight: normal}
|
||
|
ul.no-bullet {list-style: none}
|
||
|
-->
|
||
|
</style>
|
||
|
|
||
|
|
||
|
</head>
|
||
|
|
||
|
<body lang="en">
|
||
|
<a name="Overloading-support-for-Ada"></a>
|
||
|
<div class="header">
|
||
|
<p>
|
||
|
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>
|
||
|
</div>
|
||
|
<hr>
|
||
|
<a name="Overloading-support-for-Ada-1"></a>
|
||
|
<h4 class="subsubsection">15.4.10.4 Overloading support for Ada</h4>
|
||
|
<a name="index-overloading_002c-Ada"></a>
|
||
|
|
||
|
<p>The debugger supports limited overloading. Given a subprogram call in which
|
||
|
the function symbol has multiple definitions, it will use the number of
|
||
|
actual parameters and some information about their types to attempt to narrow
|
||
|
the set of definitions. It also makes very limited use of context, preferring
|
||
|
procedures to functions in the context of the <code>call</code> command, and
|
||
|
functions to procedures elsewhere.
|
||
|
</p>
|
||
|
<p>If, after narrowing, the set of matching definitions still contains more than
|
||
|
one definition, <small>GDB</small> will display a menu to query which one it should
|
||
|
use, for instance:
|
||
|
</p>
|
||
|
<div class="smallexample">
|
||
|
<pre class="smallexample">(gdb) print f(1)
|
||
|
Multiple matches for f
|
||
|
[0] cancel
|
||
|
[1] foo.f (integer) return boolean at foo.adb:23
|
||
|
[2] foo.f (foo.new_integer) return boolean at foo.adb:28
|
||
|
>
|
||
|
</pre></div>
|
||
|
|
||
|
<p>In this case, just select one menu entry either to cancel expression evaluation
|
||
|
(type <kbd>0</kbd> and press <tt class="key">RET</tt>) or to continue evaluation with a specific
|
||
|
instance (type the corresponding number and press <tt class="key">RET</tt>).
|
||
|
</p>
|
||
|
<p>Here are a couple of commands to customize <small>GDB</small>’s behavior in this
|
||
|
case:
|
||
|
</p>
|
||
|
<dl compact="compact">
|
||
|
<dd>
|
||
|
<a name="index-set-ada-print_002dsignatures"></a>
|
||
|
</dd>
|
||
|
<dt><code>set ada print-signatures</code></dt>
|
||
|
<dd><p>Control whether parameter types and return types are displayed in overloads
|
||
|
selection menus. It is <code>on</code> by default.
|
||
|
See <a href="#Overloading-support-for-Ada">Overloading support for Ada</a>.
|
||
|
</p>
|
||
|
<a name="index-show-ada-print_002dsignatures"></a>
|
||
|
</dd>
|
||
|
<dt><code>show ada print-signatures</code></dt>
|
||
|
<dd><p>Show the current setting for displaying parameter types and return types in
|
||
|
overloads selection menu.
|
||
|
See <a href="#Overloading-support-for-Ada">Overloading support for Ada</a>.
|
||
|
</p>
|
||
|
</dd>
|
||
|
</dl>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
</body>
|
||
|
</html>
|