Why can constexpr not apply to constructors?

Question

The following code cannot be compiled with VC++ 2013 CTP.

struct A
{
    constexpr A()
        : _n(5)
    {}

    int _n;
};

constexpr A f()
{
    return A();
}

int main()
{
    auto a = f();
}

error C3757: 'A': type not allowed for 'constexpr' function

I thought MSVC only supported non-member constexpr functions. — Simple
– Simple, Commented Feb 19, 2014 at 10:59
Indeed, that wouldn't be a problem for another compiler such as GCC. — E_net4
– E_net4, Commented Feb 19, 2014 at 11:21

Spock77 · Accepted Answer · 2014-02-19 13:00:19Z

2

VC 2013 does not support all C++11 features yet. Look at MSDN list.

answered Feb 19, 2014 at 13:00

Spock77

3,3352 gold badges32 silver badges41 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

xmllmx Over a year ago

My compiler is VC++ 2013 CTP, rather than VC++ 2013.

Spock77 Over a year ago

According to this article, the support of constexpr in 2013 CTP is "except for member functions".

Collectives™ on Stack Overflow

Why can constexpr not apply to constructors?

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related