Use only py::error_already_set as that's the least heavy of them. Also
changed all occurences of "throw" to "raise" so next time I'm doing a
prune of all C++ exceptions for good, those are easy to find.
This is so ugly it's beautiful. The translation needed a metaclass to
work properly, but the undoubtedly worst/best is making those exposed
nicely in the docs.
Only the double variants (since Python doesn't really differentiate
between 32bit and 64bit floats) and directly into math to mimic Python's
math module.
Only the double ones, exposed as floats, because the extra ALU required
by doubles is negligible to function call overhead. It'll be different
for non-scalar types, but here I use this.
Vladimír Vondruš