source/main.cpp: In function ‘int main()’:
source/main.cpp:17: error: ambiguous overload for ‘operator[]’ in ‘test[0]’
source/main.cpp:17: note: candidates are: operator[](float*, long int) <built-in>
source/main.cpp:17: note:                 operator[](const float*, long int) <built-in>
source/main.cpp:17: note:                 operator[](vec4*, long int) <built-in>
source/main.cpp:17: note:                 operator[](const vec4*, long int) <built-in>