Sampling from all possible floats in D

In the D programming language, the standard random (std.random) module provides a simple mechanism for generating a random number in some specified range.

auto a = uniform(0, 1024, gen);

What is the best way in D to sample from all possible floating point values?

For clarification, sampling from all possible 32-bit integers can be done as follows:

auto l = uniform!int(); // randomly selected int from all possible integers