Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/cpp2a/constexpr-dynamic18.C @ 145:1830386684a0
gcc-9.2.0
author | anatofuz |
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date | Thu, 13 Feb 2020 11:34:05 +0900 |
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// PR c++/93414 - poor diagnostic for dynamic_cast in constexpr context. // { dg-do compile { target c++2a } } // Here 'b' doesn't point/refer to a public base of Derived. struct Base { constexpr virtual ~Base(){} }; struct Derived: Base { constexpr ~Derived(){} }; constexpr const Derived& cast(const Base& b) { return dynamic_cast<const Derived&>(b); // { dg-error "reference .dynamic_cast. failed" } // { dg-message "dynamic type .const Base. of its operand does not have a base class of type .Derived." "" { target *-*-* } .-1 } } auto test() { static constexpr Base b; constexpr auto res = cast(b); return res; }