Re: [boost] Boost.Outcome review - First questions

Niall Douglas wrote:

...

template<class T> class result { public:

result(); // T() or error, legitimate fork

result( T const& ); result( T&& );

result( std::error_code const& ) noexcept;

result( result const& ); result( result&& );

result( outcome const& ); //? result( outcome && ); //?

bool has_value() const noexcept; bool has_error() const noexcept;

T value() const; T value() &&;

std::error_code error() const;

explicit operator bool() const noexcept;

void swap( result& ) noexcept; };

That's literally it.

You're missing a few bits of necessary stuff, like equality operators, initialiser list construction and so on.

Equality yes, initializer list no. This works: #include <vector> #include template<class T> class result { private: T t_; public: result( T const& t ): t_( t ) { } result( T&& t ): t_( std::move( t ) ) { } result( std::error_code const & ) { } }; int main() { result r{ { 1, 2, 3 } }; }

But essentially you've just specified Vicente's Expected there.

I don't think I have. Expected has more members.