48 lines
1.2 KiB
C++
48 lines
1.2 KiB
C++
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// RUN: %clang_cc1 -fsyntax-only %s -std=c++11 -verify -fexceptions -fcxx-exceptions
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// This is a test for an egregious hack in Clang that works around
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// an issue with GCC's <utility> implementation. std::pair::swap
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// has an exception specification that makes an unqualified call to
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// swap. This is invalid, because it ends up calling itself with
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// the wrong number of arguments.
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#ifdef BE_THE_HEADER
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#pragma GCC system_header
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namespace std {
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template<typename T> void swap(T &, T &);
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template<typename A, typename B> struct pair {
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void swap(pair &other) noexcept(noexcept(swap(*this, other)));
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};
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}
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#else
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#define BE_THE_HEADER
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#include __FILE__
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struct X {};
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using PX = std::pair<X, X>;
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using PI = std::pair<int, int>;
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void swap(PX &, PX &) noexcept;
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PX px;
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PI pi;
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static_assert(noexcept(px.swap(px)), "");
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static_assert(!noexcept(pi.swap(pi)), "");
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namespace sad {
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template<typename T> void swap(T &, T &);
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template<typename A, typename B> struct pair {
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void swap(pair &other) noexcept(noexcept(swap(*this, other))); // expected-error {{too many arguments}} expected-note {{declared here}}
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};
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pair<int, int> pi;
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static_assert(!noexcept(pi.swap(pi)), ""); // expected-note {{in instantiation of}}
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}
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#endif
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