Consider the following program:
#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;
}
It returns only zeroes, while I would have expected "hello"
to be a const char[6]
. What is the type of "hello"
?
Edit: I was too quick and didn't notice the const char[6]
. Since none of your checks involve &
:
Quoting 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.
Hence, the type is const char (&)[6]
.