字符串文字类型不符合预期

String literal type is not as expected

考虑以下程序:

#include <iostream>
#include <type_traits>

int main(int argc, char* argv[])
{
    std::cout << std::is_same<decltype("hello"), char*>::value << std::endl;
    std::cout << std::is_same<decltype("hello"), const char*>::value << std::endl;
    std::cout << std::is_same<decltype("hello"), char[5]>::value << std::endl;
    std::cout << std::is_same<decltype("hello"), const char[5]>::value << std::endl;
    std::cout << std::is_same<decltype("hello"), char[6]>::value << std::endl;
    std::cout << std::is_same<decltype("hello"), const char[6]>::value << std::endl;
    std::cout << std::is_same<decltype("hello"), char[]>::value << std::endl;
    std::cout << std::is_same<decltype("hello"), const char[]>::value << std::endl;
    return 0;
}

它 returns 只有零,而我本以为 "hello"const char[6]"hello" 的类型是什么?

编辑:我太快了,没有注意到 const char[6]。由于 none 您的支票涉及 &:

引用 8.4.1 Literals:

A literal is a primary expression. Its type depends on its form. A string literal is an lvalue; all other literals are prvalues.

因此,类型是const char (&)[6]

类型是 const char (&)[6] 如您所见 here