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| <title>Debugging with GDB: gdb.prompt</title> |
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| <h4 class="subsubsection">23.2.4.3 gdb.prompt</h4> |
| <a name="index-gdb_002eprompt"></a> |
| |
| <p>This module provides a method for prompt value-substitution. |
| </p> |
| <dl compact="compact"> |
| <dt><code>substitute_prompt (<var>string</var>)</code></dt> |
| <dd><p>Return <var>string</var> with escape sequences substituted by values. Some |
| escape sequences take arguments. You can specify arguments inside |
| “{}” immediately following the escape sequence. |
| </p> |
| <p>The escape sequences you can pass to this function are: |
| </p> |
| <dl compact="compact"> |
| <dt><code>\\</code></dt> |
| <dd><p>Substitute a backslash. |
| </p></dd> |
| <dt><code>\e</code></dt> |
| <dd><p>Substitute an ESC character. |
| </p></dd> |
| <dt><code>\f</code></dt> |
| <dd><p>Substitute the selected frame; an argument names a frame parameter. |
| </p></dd> |
| <dt><code>\n</code></dt> |
| <dd><p>Substitute a newline. |
| </p></dd> |
| <dt><code>\p</code></dt> |
| <dd><p>Substitute a parameter’s value; the argument names the parameter. |
| </p></dd> |
| <dt><code>\r</code></dt> |
| <dd><p>Substitute a carriage return. |
| </p></dd> |
| <dt><code>\t</code></dt> |
| <dd><p>Substitute the selected thread; an argument names a thread parameter. |
| </p></dd> |
| <dt><code>\v</code></dt> |
| <dd><p>Substitute the version of GDB. |
| </p></dd> |
| <dt><code>\w</code></dt> |
| <dd><p>Substitute the current working directory. |
| </p></dd> |
| <dt><code>\[</code></dt> |
| <dd><p>Begin a sequence of non-printing characters. These sequences are |
| typically used with the ESC character, and are not counted in the string |
| length. Example: “\[\e[0;34m\](gdb)\[\e[0m\]” will return a |
| blue-colored “(gdb)” prompt where the length is five. |
| </p></dd> |
| <dt><code>\]</code></dt> |
| <dd><p>End a sequence of non-printing characters. |
| </p></dd> |
| </dl> |
| |
| <p>For example: |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample">substitute_prompt (``frame: \f, |
| print arguments: \p{print frame-arguments}'') |
| </pre></div> |
| |
| <p>will return the string: |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample">"frame: main, print arguments: scalars" |
| </pre></div> |
| </dd> |
| </dl> |
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