floats, bits, and constant expressions – hbr

Can you access the bits that represent an IEEE754 single precision float in a C++14 constant expression (constexpr)? (Why would you want to do that? Maybe you want to run a fast inverse square root at compile time. Or maybe you want to do something that is actually useful. I wanted to know if it could be done.) For context: this article is based on experiences using gcc-5.3.0 and clang-3.7.1 with