根据GCC 4.6.3(Ubuntu/Linaro 4.6.3-1ubuntu5),我在以下代码中的数组初始化中缺少大括号:
#include <iostream>
#include <boost/array.hpp>
#include <array>
int main(){
int plain[] = {1,2,3,4,5};
std::array <int, 5> std_arr = {1,2,3,4,5}; // warning, see below
boost::array<int, 5> boost_arr = {1,2,3,4,5}; // warning, see below
std::cout << plain[0] << std_arr[1] << boost_arr[2] << std::endl;
}
Run Code Online (Sandbox Code Playgroud)
> g++ test.cc -Wall -Wextra -pedantic --std=c++0x
test.cc: in function »int main()«:
test.cc:7:47: warning: curly braces missing around initialization for »std::array::value_type [5] {aka int [5]}« [-Wmissing-braces]
test.cc:8:47: warning: curly braces missing around initialization for »int [5]« [-Wmissing-braces] …