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comparison gcc/testsuite/g++.dg/cpp2a/constexpr-virtual14.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++/92695
2 // { dg-do compile { target c++2a } }
3
4 struct A {
5 virtual int get () = 0;
6 virtual int set (A *o) = 0;
7 };
8 struct B : A {
9 constexpr int get () override { return 10; }
10 constexpr int set (A *o) override { a = o; return 20; }
11 A *a {};
12 };
13 constexpr auto addressof = [] (A &n) { return &n; };
14 struct C {
15 B b;
16 A *c { addressof (b) };
17 constexpr int add () { return c->set (addressof (b)); }
18 };
19 struct D {
20 B b[2];
21 A *c { addressof (b[0]) };
22 constexpr int add () { return c->set (addressof (b[0])); }
23 };
24 template <typename T>
25 constexpr int get () { T f; return f.add (); }
26 static_assert (get<C> () == 20);
27 static_assert (get<D> () == 20);