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| <h5 class="subsubsection">15.4.6.9 <span class="sc">gdb</span> and Modula-2</h5> |
| |
| <p>Some <span class="sc">gdb</span> commands have little use when debugging Modula-2 programs. |
| Five subcommands of <code>set print</code> and <code>show print</code> apply |
| specifically to C and C<tt>++</tt>: ‘<samp><span class="samp">vtbl</span></samp>’, ‘<samp><span class="samp">demangle</span></samp>’, |
| ‘<samp><span class="samp">asm-demangle</span></samp>’, ‘<samp><span class="samp">object</span></samp>’, and ‘<samp><span class="samp">union</span></samp>’. The first four |
| apply to C<tt>++</tt>, and the last to the C <code>union</code> type, which has no direct |
| analogue in Modula-2. |
| |
| <p>The <code>@</code> operator (see <a href="Expressions.html#Expressions">Expressions</a>), while available |
| with any language, is not useful with Modula-2. Its |
| intent is to aid the debugging of <dfn>dynamic arrays</dfn>, which cannot be |
| created in Modula-2 as they can in C or C<tt>++</tt>. However, because an |
| address can be specified by an integral constant, the construct |
| ‘<samp><span class="samp">{</span><var>type</var><span class="samp">}</span><var>adrexp</var></samp>’ is still useful. |
| |
| <p><a name="index-g_t_0040code_007b_0023_007d-in-Modula_002d2-857"></a>In <span class="sc">gdb</span> scripts, the Modula-2 inequality operator <code>#</code> is |
| interpreted as the beginning of a comment. Use <code><></code> instead. |
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