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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - -Wunused-private-field behavior depends on copy constructor"
href="https://bugs.llvm.org/show_bug.cgi?id=36762">36762</a>
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<th>Summary</th>
<td>-Wunused-private-field behavior depends on copy constructor
</td>
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<th>Product</th>
<td>clang
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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>Linux
</td>
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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
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<th>Component</th>
<td>Frontend
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>eugene.zelenko@gmail.com
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<pre>I noticed difference in -Wunused-private-field behavior while cleaning
include/clang/Analysis/Analyses/ThreadSafetyTIL.h: warning is shown with
default copy constuctor, but not shown with custom copy constructor, same as
default:
/// Placeholder for expressions that cannot be represented in the TIL.
class Undefined : public SExpr {
public:
Undefined(const Stmt *S = nullptr) : SExpr(COP_Undefined), Cstmt(S) {}
Undefined(const Undefined &) = default; // <- warning
Undefined(const Undefined &U) : SExpr(U), Cstmt(U.Cstmt) {} // <- no warning
static bool classof(const SExpr *E) { return E->opcode() == COP_Undefined; }
template <class V>
typename V::R_SExpr traverse(V &Vs, typename V::R_Ctx Ctx) {
return Vs.reduceUndefined(*this);
}
template <class C>
typename C::CType compare(const Undefined* E, C& Cmp) const {
return Cmp.trueResult();
}
private:
const Stmt *Cstmt;
};</pre>
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