相关疑难解决方法(0)

#include <iostream>
#include <array>

int main(int argc, char **argv) {
    constexpr const std::array<int, 2> arr {{ 0, 1 }};
    constexpr const int arr2[] = { 0, 1};

    static_assert(arr[0] == arr2[0], "asdf");
    static_assert(arr[1] == arr2[1], "asdfasdf");

    return 0;
}

当编译gcc 4.8.2和4.9.1使用g++ test.cpp --std=c++11,编译成功.当编译clang 3.4和3.5利用clang++ test.cpp --std=c++11然而,编译失败:

test.cpp:8:16: error: static_assert expression is not an integral constant expression
        static_assert(arr[0] == arr2[0], "asdf");
                      ^~~~~~~~~~~~~~~~~
test.cpp:8:16: note: non-constexpr function 'operator[]' cannot be used …