std::map<const SDL_Texture, std::vector<int[3]>> textures;

textures.insert(
    std::pair<const SDL_Texture, std::vector<int[3]>>(
       SDL_CreateTextureFromSurface(renderer, s),
       std::vector<int[3]>()
    )
);

no instance of constructor "std::pair<_Ty1,_Ty2>::pair
[with _ty1=const SDL_Texture, _Ty2=std::vector<int[3],std::allocator<int[3]>>]"
matches the argument list argument types are:
(SDL_Texture*, std::vector<int[3],std::allocator<int[3]>>)

for (std::pair<const SDL_Texture, std::vector<int[3]>> tex : textures) {
}