How to cheaply assign C-style array to std::vector?

Question

Currently I do the following:

// float *c_array = new float[1024];

void Foo::foo(float *c_array, size_t c_array_size) {
  //std::vector cpp_arr         


        

Answer 1

The only way to do it would be to create a custom allocator.

1. Write an allocator class that you can initialise with your array.

2. Instantiate the vector with the allocator as an argument.