NoumanAmir657 added a comment.
**Code:**
struct Base {
constexpr Base() = default;
};
struct Derived : virtual Base {
constexpr Derived() = default;
};
struct NoCopyMove {
constexpr NoCopyMove() {}
NoCopyMove(const NoCopyMove&);
NoCopyMove(NoCopyMove&&);
};
struct S2 {
constexpr S2() = default;
constexpr S2(const S2&) = default;
constexpr S2(S2&&) = default;
NoCopyMove ncm;
};
**Error Generated**
../../llvm-test/x.cpp:5:3: error: default constructor cannot be 'constexpr'
in a class with virtual base class
5 | constexpr Derived() = default;
| ^
../../llvm-test/x.cpp:4:18: note: virtual base class declared here
4 | struct Derived : virtual Base {
| ^
../../llvm-test/x.cpp:15:3: error: defaulted definition of copy constructor
is not constexpr
15 | constexpr S2(const S2&) = default;
| ^
../../llvm-test/x.cpp:16:3: error: defaulted definition of move constructor
is not constexpr
16 | constexpr S2(S2&&) = default;
| ^
3 errors generated.
@aaron.ballman do you mean like this? This now generates different diagnostics
depending on whether a virtual base class is present or not
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D158540/new/
https://reviews.llvm.org/D158540
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