<html>
<head>
<base href="https://bugs.llvm.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Should = { 0 }; fire -Wmissing-braces in C99?"
href="https://bugs.llvm.org/show_bug.cgi?id=32156">32156</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Should = { 0 }; fire -Wmissing-braces in C99?
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>3.9
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Frontend
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>gpakosz@pempek.net
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Hello,
I noticed GCC and clang behave differently regarding -Wmissing-braces.
In C99, I'm wondering whether "= { 0 };" should warn when initializing a struct
defined with another struct as member and so on and so forth.
For example, <a href="https://godbolt.org/g/WLySA2">https://godbolt.org/g/WLySA2</a>
struct Bar
{
int i;
};
struct Foo
{
struct Bar bar;
};
int main(int argc, char* argv[])
{
//struct Foo foo = { { 0 } };
struct Foo foo = { 0 };
return foo.bar.i;
}
Would struct Bar contain another struct Baz, then I would need to initialize
foo with 3 levels of nested braces. However, when initializing struct Foo, all
that matters is that it all gets initialized to 0. I don't believe I should
have to jump from header to header to figure out the number of nested braces I
need to use or that I should be brute-force adding levels of { } until the
compiler stops complaining.
Also, contrary to clang, it seems recent GCC versions stopped emitting
-Wmissing-braces when one writes = { 0 };
What do you think?</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>