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comparison gcc/testsuite/g++.dg/cpp2a/constexpr-dynamic8.C @ 145:1830386684a0

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gcc-9.2.0
author anatofuz
date Thu, 13 Feb 2020 11:34:05 +0900
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131:84e7813d76e9 145:1830386684a0
1 // PR c++/88337 - Implement P1327R1: Allow dynamic_cast/typeid in constexpr.
2 // { dg-do compile { target c++2a } }
3
4 // Unrelated type.
5
6 struct B { virtual void b(); };
7 struct P1 { virtual void p1(); };
8 struct P2 { virtual void p2(); };
9 struct A : public B, private P1, protected P2 { virtual void a(); };
10
11 constexpr A a;
12
13 struct U { virtual void u(); };
14
15 constexpr bool b1 = (dynamic_cast<U&>((B&)a), 0); // { dg-error "reference .dynamic_cast. failed" }
16 // { dg-message "dynamic type .A. of its operand does not have an unambiguous public base class .U." "" { target *-*-* } .-1 }
17 constexpr bool b2 = (dynamic_cast<U&>((P1&)a), 0); // { dg-error "reference .dynamic_cast. failed" }
18 // { dg-message "static type .const P1. of its operand is a non-public base class of dynamic type .A." "" { target *-*-* } .-1 }
19 constexpr bool b3 = (dynamic_cast<U&>((P2&)a), 0); // { dg-error "reference .dynamic_cast. failed" }
20 // { dg-message "static type .const P2. of its operand is a non-public base class of dynamic type .A." "" { target *-*-* } .-1 }
21
22 static_assert (dynamic_cast<U*>((B*)&a) == nullptr);
23 static_assert (dynamic_cast<U*>((P1*)&a) == nullptr);
24 static_assert (dynamic_cast<U*>((P2*)&a) == nullptr);