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[clang] Add test for CWG170 "Pointer-to-member conversions" #121667

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Merged
merged 1 commit into from
Jan 13, 2025
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[clang] Add test for CWG170 "Pointer-to-member conversions" #121667

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20 changes: 20 additions & 0 deletions clang/test/CXX/drs/cwg1xx.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1074,6 +1074,26 @@ namespace cwg169 { // cwg169: yes
};
}

namespace cwg170 { // cwg170: 3.1
#if __cplusplus >= 201103L
struct A {};
struct B : A { int i; };
struct C : A {};
struct D : C {};

constexpr int f(int A::*) { return 0; }
constexpr int g(int C::*) { return 0; }
constexpr int h(int D::*) { return 0; }

constexpr auto p = static_cast<int A::*>(&B::i);
constexpr auto q = f(p);
constexpr auto r = g(p);
// since-cxx11-error@-1 {{constexpr variable 'r' must be initialized by a constant expression}}
constexpr auto s = h(p);
// since-cxx11-error@-1 {{constexpr variable 's' must be initialized by a constant expression}}
#endif
} // namespace cwg170

namespace { // cwg171: 3.4
int cwg171a;
}
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2 changes: 1 addition & 1 deletion clang/www/cxx_dr_status.html
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Expand Up @@ -1065,7 +1065,7 @@ <h2 id="cxxdr">C++ defect report implementation status</h2>
<td><a href="https://cplusplus.github.io/CWG/issues/170.html">170</a></td>
<td>DRWP</td>
<td>Pointer-to-member conversions</td>
<td class="unknown" align="center">Unknown</td>
<td class="full" align="center">Clang 3.1</td>
</tr>
<tr id="171">
<td><a href="https://cplusplus.github.io/CWG/issues/171.html">171</a></td>
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