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How do I initialize a member array with an initializer_list?5個

這是否可能？

#include

#include

struct A

{

A ( std::initializer_list< int > l )

: m_a ( l )

{

}

std::array m_a;

};

int main()

{

A a{ 1,2 };

}

但是這會導致這個錯誤：

t.cpp: In constructor ‘A::A(std::initializer_list)’:

t.cpp:7:19: error: no matching function for call to ‘std::array::array(std::initializer_list&)’

: m_a ( l )

^

t.cpp:7:19: note: candidates are:

In file included from t.cpp:1:0:

/usr/lib/gcc/x86_64-pc-linux-gnu/4.8.2/include/g++-v4/array:81:12: note: std::array::array()

struct array

^

/usr/lib/gcc/x86_64-pc-linux-gnu/4.8.2/include/g++-v4/array:81:12: note: candidate expects 0 arguments,1 provided

/usr/lib/gcc/x86_64-pc-linux-gnu/4.8.2/include/g++-v4/array:81:12: note: constexpr std::array::array(const std::array&)

/usr/lib/gcc/x86_64-pc-linux-gnu/4.8.2/include/g++-v4/array:81:12: note: no known conversion for argument 1 from ‘std::initializer_list’ to ‘const std::array&’

/usr/lib/gcc/x86_64-pc-linux-gnu/4.8.2/include/g++-v4/array:81:12: note: constexpr std::array::array(std::array&&)

/usr/lib/gcc/x86_64-pc-linux-gnu/4.8.2/include/g++-v4/array:81:12: note: no known conversion for argument 1 from ‘std::initializer_list’ to ‘std::array&&’

總結

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