glGenTextures with zero textures

Question

Simple question: What happens when I call glGenTextures(0, someptr);, generating zero textures? I have a function which generates textures based on a number given by a parameter, which may be 0. I did not find anything in the OpenGL reference pages, Google or StackOverflow. Is it completely undefined (not even defined as undefined behaviour) and therefore dependent on the driver?

Answer 1

I'd be likely just to take the spec at its literal word and assume that the function will "return 0 previously unused texture names in [the array pointed to by the second parameter]". Making it a no-op, in effect.