1<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 2<html> 3<!-- Copyright (C) 1988-2021 Free Software Foundation, Inc. 4 5Permission is granted to copy, distribute and/or modify this document 6under the terms of the GNU Free Documentation License, Version 1.3 or 7any later version published by the Free Software Foundation; with the 8Invariant Sections being "Free Software" and "Free Software Needs 9Free Documentation", with the Front-Cover Texts being "A GNU Manual," 10and with the Back-Cover Texts as in (a) below. 11 12(a) The FSF's Back-Cover Text is: "You are free to copy and modify 13this GNU Manual. Buying copies from GNU Press supports the FSF in 14developing GNU and promoting software freedom." --> 15<!-- Created by GNU Texinfo 5.1, http://www.gnu.org/software/texinfo/ --> 16<head> 17<title>Debugging with GDB: Ada Mode Intro</title> 18 19<meta name="description" content="Debugging with GDB: Ada Mode Intro"> 20<meta name="keywords" content="Debugging with GDB: Ada Mode Intro"> 21<meta name="resource-type" content="document"> 22<meta name="distribution" content="global"> 23<meta name="Generator" content="makeinfo"> 24<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 25<link href="index.html#Top" rel="start" title="Top"> 26<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index"> 27<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> 28<link href="Ada.html#Ada" rel="up" title="Ada"> 29<link href="Omissions-from-Ada.html#Omissions-from-Ada" rel="next" title="Omissions from Ada"> 30<link href="Ada.html#Ada" rel="previous" title="Ada"> 31<style type="text/css"> 32<!-- 33a.summary-letter {text-decoration: none} 34blockquote.smallquotation {font-size: smaller} 35div.display {margin-left: 3.2em} 36div.example {margin-left: 3.2em} 37div.indentedblock {margin-left: 3.2em} 38div.lisp {margin-left: 3.2em} 39div.smalldisplay {margin-left: 3.2em} 40div.smallexample {margin-left: 3.2em} 41div.smallindentedblock {margin-left: 3.2em; font-size: smaller} 42div.smalllisp {margin-left: 3.2em} 43kbd {font-style:oblique} 44pre.display {font-family: inherit} 45pre.format {font-family: inherit} 46pre.menu-comment {font-family: serif} 47pre.menu-preformatted {font-family: serif} 48pre.smalldisplay {font-family: inherit; font-size: smaller} 49pre.smallexample {font-size: smaller} 50pre.smallformat {font-family: inherit; font-size: smaller} 51pre.smalllisp {font-size: smaller} 52span.nocodebreak {white-space:nowrap} 53span.nolinebreak {white-space:nowrap} 54span.roman {font-family:serif; font-weight:normal} 55span.sansserif {font-family:sans-serif; font-weight:normal} 56ul.no-bullet {list-style: none} 57--> 58</style> 59 60 61</head> 62 63<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> 64<a name="Ada-Mode-Intro"></a> 65<div class="header"> 66<p> 67Next: <a href="Omissions-from-Ada.html#Omissions-from-Ada" accesskey="n" rel="next">Omissions from 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> 68</div> 69<hr> 70<a name="Introduction"></a> 71<h4 class="subsubsection">15.4.10.1 Introduction</h4> 72<a name="index-Ada-mode_002c-general"></a> 73 74<p>The Ada mode of <small>GDB</small> supports a fairly large subset of Ada expression 75syntax, with some extensions. 76The philosophy behind the design of this subset is 77</p> 78<ul> 79<li> That <small>GDB</small> should provide basic literals and access to operations for 80arithmetic, dereferencing, field selection, indexing, and subprogram calls, 81leaving more sophisticated computations to subprograms written into the 82program (which therefore may be called from <small>GDB</small>). 83 84</li><li> That type safety and strict adherence to Ada language restrictions 85are not particularly important to the <small>GDB</small> user. 86 87</li><li> That brevity is important to the <small>GDB</small> user. 88</li></ul> 89 90<p>Thus, for brevity, the debugger acts as if all names declared in 91user-written packages are directly visible, even if they are not visible 92according to Ada rules, thus making it unnecessary to fully qualify most 93names with their packages, regardless of context. Where this causes 94ambiguity, <small>GDB</small> asks the user’s intent. 95</p> 96<p>The debugger will start in Ada mode if it detects an Ada main program. 97As for other languages, it will enter Ada mode when stopped in a program that 98was translated from an Ada source file. 99</p> 100<p>While in Ada mode, you may use ‘<tt>--</tt>’ for comments. This is useful 101mostly for documenting command files. The standard <small>GDB</small> comment 102(‘<samp>#</samp>’) still works at the beginning of a line in Ada mode, but not in the 103middle (to allow based literals). 104</p> 105 106 107 108</body> 109</html> 110