uhd: Replace all occurrences of boost::bind with std::bind

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.

1 files changed, 4 insertions, 3 deletions

diff --git a/host/lib/utils/ihex.cpp b/host/lib/utils/ihex.cpp
index fed2b239e..24d8cbdb6 100644
--- a/host/lib/utils/ihex.cpp
+++ b/host/lib/utils/ihex.cpp
@@ -8,9 +8,10 @@
 #include <uhd/exception.hpp>
 #include <uhdlib/utils/ihex.hpp>
 #include <boost/format.hpp>
+#include <fstream>
+#include <functional>
 #include <memory>
 #include <sstream>
-#include <fstream>
 
 using namespace uhd;
 
@@ -196,7 +197,7 @@ void ihex_reader::to_bin_file(const std::string &bin_filename)
         throw uhd::io_error(str(boost::format("Could not open file for writing: %s") % bin_filename));
     }
 
-    this->read(boost::bind(&_file_writer_callback, output_file, _3, _4));
+    this->read(std::bind(&_file_writer_callback, output_file, std::placeholders::_3, std::placeholders::_4));
 
     output_file->close();
 }
@@ -219,7 +220,7 @@ std::vector<uint8_t> ihex_reader::to_vector(const size_t size_estimate)
     std::vector<uint8_t> buf;
     buf.reserve(size_estimate == 0 ? DEFAULT_SIZE_ESTIMATE : size_estimate);
 
-    this->read(boost::bind(&_vector_writer_callback, boost::ref(buf), _3, _4));
+    this->read(std::bind(&_vector_writer_callback, std::ref(buf), std::placeholders::_3, std::placeholders::_4));
 
     return buf;
 }