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<h4 class="subsection">4.1.2 Diagnostic Severity</h4>
<p><a name="index-Severity-of-compiler-messages-24"></a><a name="index-Compiler-Diagnostic-Severity-25"></a><a name="index-error-26"></a><a name="index-warning-27"></a><a name="index-style_002dwarning-28"></a><a name="index-compiler_002dnote-29"></a><a name="index-code_002ddeletion_002dnote-30"></a>
There are four levels of compiler diagnostic severity:
<ol type=1 start=1>
<li>error
<li>warning
<li>style warning
<li>note
</ol>
<p>The first three levels correspond to condition classes which are
defined in the ANSI standard for Common Lisp and which have special
significance to the <code>compile</code> and <code>compile-file</code> functions.
These levels of compiler error severity occur when the compiler
handles conditions of these classes.
<p>The fourth level of compiler error severity, <em>note</em>, corresponds
to the <code>sb-ext:compiler-note</code>, and is used for problems which are
too mild for the standard condition classes, typically hints about how
efficiency might be improved. The <code>sb-ext:code-deletion-note</code>, a
subtype of <code>compiler-note</code>, is signalled when the compiler
deletes user-supplied code after proving that the code in question is
unreachable.
<p>Future work for SBCL includes expanding this hierarchy of types to
allow more fine-grained control over emission of diagnostic messages.
<p><a name="Condition-sb_002dext_003acompiler_002dnote"></a>
<div class="defun">
— Condition: <b>sb-ext:compiler-note</b><var><a name="index-sb_002dext_003acompiler_002dnote-31"></a></var><br>
<blockquote><p><a name="index-sb_002dext_003acompiler_002dnote-32"></a>Class precedence list: <code>compiler-note, condition, t</code>
<p>Root of the hierarchy of conditions representing information discovered
by the compiler that the user might wish to know, but which does not merit
a <code>style-warning</code> (or any more serious condition).
</p></blockquote></div>
<p><a name="Condition-sb_002dext_003acode_002ddeletion_002dnote"></a>
<div class="defun">
— Condition: <b>sb-ext:code-deletion-note</b><var><a name="index-sb_002dext_003acode_002ddeletion_002dnote-33"></a></var><br>
<blockquote><p><a name="index-sb_002dext_003acode_002ddeletion_002dnote-34"></a>Class precedence list: <code>code-deletion-note, compiler-note, condition, t</code>
<p>A condition type signalled when the compiler deletes code that the user
has written, having proved that it is unreachable.
</p></blockquote></div>
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Mandriva
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i586
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files
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