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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - "typedef requires a name" should not always be an error with -pedantic-errors"
href="http://llvm.org/bugs/show_bug.cgi?id=22249">22249</a>
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<th>Summary</th>
<td>"typedef requires a name" should not always be an error with -pedantic-errors
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C++
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>harald@gigawatt.nl
</td>
</tr>
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<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Compiling
typedef struct S { };
with -pedantic-errors gives
test.cc:1:1: error: typedef requires a name [-Werror,-Wmissing-declarations]
typedef struct S { };
^~~~~~~
1 error generated.
This should remain a warning. There is no rule in C++ (C++11, anyway) anywhere
disallowing this, and GCC does accept it when compiling with -pedantic-errors.
Note:
typedef struct { };
gives the exact same error message, but clang is right to reject this (as is
GCC). This violates [dcl.dcl]p5: "In such cases, the decl-specifier-seq shall
introduce one or more names into the program, or shall redeclare a name
introduced by a previous declaration" with or without the typedef keyword.</pre>
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