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Add a blurb about the use of class vs. struct keyword in class decls.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16500 91177308-0d34-0410-b5e6-96231b3b80d8
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Reid Spencer 2004-09-23 16:03:48 +00:00
parent 684fe210a9
commit b40df56f26
1 changed files with 18 additions and 0 deletions
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docs/CodingStandards.html
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@ -29,6 +29,7 @@
<li><a href="#ci_warningerrors">Treat Compiler Warnings Like
Errors</a></li>
<li><a href="#ci_portable_code">Write Portable Code</a></li>
<li><a href="#ci_class_struct">Use of class/struct Keywords</a></li>
</ol></li>
</ol></li>
<li><a href="#styleissues">Style Issues</a>
@ -366,6 +367,23 @@ to support it.</p>
</div>
<!-- _______________________________________________________________________ -->
<div class="doc_subsubsection">
<a name="ci_class_struct">Use of <tt>class</tt> and <tt>struct</tt> Keywords</a>
</div>
<div class="doc_text">
<p>In C++ the <tt>class</tt> and <tt>struct</tt> keywoards can be used almost
interchangeably. The only difference is when they are used to declare a class:
<tt>class</tt> makes all members private by default while <tt>struct</tt>
makes all members public by defaut.<p>
<p>Unfortunately, not all compilers follow the rules and some will generate
different symbols based on whether <tt>class</tt> or <tt>struct</tt> was used
to declare the symbol. This can lead to problems at link time.</p>
<p>So, the rule for LLVM is this: "always use the <tt>class</tt> keyword,
unless <b>all</b> members are public in which case <tt>struct</tt> is
allowed.</p>
</div>
<!-- *********************************************************************** -->
<div class="doc_section">
<a name="styleissues">Style Issues</a>