John Maddock wrote:
Uh, where is it?
It was posted to the boost-users list. Implementation is utterly trivial anyway.
There are a number of useful things to go with complex. Here is another.
It is common to need the scalar type that corresponds to a numeric type, whether that type is complex or scalar. For example, the type returned by abs. Implementation is pretty trivial:
Interesting, and good point.
OK, is there any objection to is_complex being added, what about Neal's trait (and what to call it if it is added, "scalar" maybe?).
I propose a collection of complex utilities. This would include: 1) is_complex 2) scalar 3) A collection of iterator adapters: 3.1) Transform complex sequence to scalar (yield alternating real/imag parts) 3.2) Inverse of 3.1 3.3) Pick off real part of complex 3.4) Pick off imag part of complex 3.5) zip 2 scalar sequences into complex sequence I have code based on boost iterator adapter for all the above.