Whenever gains where set through a gain_group, it would output spurious
log messages that must stem from someone's debug code, since the log
messages are not very useful by themselves.
Note: Replacing everything with a lambda would be even better, but that
can't be easily scripted so we'll do this as a first step to reduce the
Boost footprint.
This also removes occurences of #include <boost/bind.hpp>, and makes
sure all usages of std::bind have an #include <functional>. clang-format
wasn't always applied to minimize the changeset in this commit, however,
it was applied to the blocks of #includes.
Due to conflicts with other Boost libraries, the placeholders _1, _2,
etc. could not be directly used, but had to be explicitly called out
(as std::placeholders::_1, etc.). This makes the use of std::bind even
uglier, which serves as another reminder that using std::bind (and even
more so, boost::bind) should be avoided.
nirio/rpc/rpc_client.cpp still contains a reference to boost::bind. It
was not possible to remove it by simply doing a search and replace, so
it will be removed in a separate commit.
Add convenience factory for making a gain group that has a single
zero-valued element. This factory requires a name, which should
probably be ALL_GAINS, or something similar (these constants are
device-specific).
Using this new make_zero factory in the X300 radio control when we
don't find any gain elements so that our gain groups aren't empty. This
simplifies our later setters/getters because we know that we'll always
have _something_ cached.
Note that we only register this zero value gain group for TX, as our
ADC is registered as a gain element, so our RX gain groups are never
empty.
created a templated range that that holds a start, stop, and step
created a meta-range template that is a vector of ranges
meta-range can calculate the overall start, stop, step
or be indexed to get at components
replaced instances of range.min, max, step with the functions
start() stop() and step()
the xcvr frequency range is now expressed in as two ranges
(have to fix its clip function though)
