[igraph] Question on igraph_integer_t and igraph_real_t

[Chris Wj]

I was reading the code to understand the underlying mechanisms in igraph. This is probably more of a C programming question, but why is igraph_integer_t defined as a double?

> typedef double igraph_integer_t;
> typedef double igraph_real_t;

At first, I thought this was to have 64-bits for storing graph and edge ids because the graphs can get quite large. What is the benefit over using a long int?

-Chris