http://llvm.org/bugs/show_bug.cgi?id=6741
Summary: Can't have multiple anonymous unions which redeclare
members
Product: clang
Version: trunk
Platform: Macintosh
OS/Version: MacOS X
Status: NEW
Severity: normal
Priority: P
Component: C++
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
Created an attachment (id=4610)
--> (http://llvm.org/bugs/attachment.cgi?id=4610)
testcase
Perhaps this is a violation of the spec and clang is right to disallow it,
however it does crop up in "real world" code so it *might* be better for this
to be a warning rather than an error. Here is a small example of what I'm
talking about
p.s. As it happens the one use of this in the AVM code base is entirely
frivolous and can easily be removed, but perhaps it affects other codebases...
void foo() {
union {
char *m_a;
int *m_b;
};
// some code
if(somecondition) {
union {
char *m_a;
int *m_b;
};
// some code
}
}
Currently clang gives you the following error:
union-bug.cpp:11:10: error: member of anonymous union redeclares 'm_a'
char *m_a;
^
union-bug.cpp:5:9: note: previous declaration is here
char *m_a;
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