host: Update code base using clang-tidy

The checks from the new clang-tidy file are applied to the source tree
using:

$ find . -name "*.cpp" | sort -u | xargs \
    --max-procs 8 --max-args 1 clang-tidy --format-style=file \
    --fix -p /path/to/compile_commands.json

2 files changed, 5 insertions, 5 deletions

diff --git a/host/examples/gpio.cpp b/host/examples/gpio.cpp
index 12bcd26f7..d4a188c66 100644
--- a/host/examples/gpio.cpp
+++ b/host/examples/gpio.cpp
@@ -214,9 +214,9 @@ int UHD_SAFE_MAIN(int argc, char* argv[])
     std::cout << "Using GPIO bank: " << gpio << std::endl;
 
     // subdev spec
-    if (tx_subdev_spec != "")
+    if (!tx_subdev_spec.empty())
         usrp->set_tx_subdev_spec(tx_subdev_spec);
-    if (rx_subdev_spec != "")
+    if (!rx_subdev_spec.empty())
         usrp->set_rx_subdev_spec(rx_subdev_spec);
     std::cout << boost::format("  rx_subdev_spec: %s")
                      % usrp->get_rx_subdev_spec(0).to_string()
diff --git a/host/examples/test_dboard_coercion.cpp b/host/examples/test_dboard_coercion.cpp
index 0fb6f1872..7dd053610 100644
--- a/host/examples/test_dboard_coercion.cpp
+++ b/host/examples/test_dboard_coercion.cpp
@@ -44,7 +44,7 @@ std::string return_usrp_config_string(
     std::string rx_serial, rx_subdev_name, rx_subdev_spec;
 
     mboard_id = tx_info.get("mboard_id");
-    if (tx_info.get("mboard_serial") == "")
+    if (tx_info.get("mboard_serial").empty())
         mboard_serial = "no serial";
     else
         mboard_serial = tx_info.get("mboard_serial");
@@ -53,7 +53,7 @@ std::string return_usrp_config_string(
         str(boost::format("Motherboard: %s (%s)\n") % mboard_id % mboard_serial);
 
     if (test_tx) {
-        if (tx_info.get("tx_serial") == "")
+        if (tx_info.get("tx_serial").empty())
             tx_serial = "no serial";
         else
             tx_serial = tx_info.get("tx_serial");
@@ -68,7 +68,7 @@ std::string return_usrp_config_string(
     if (test_tx and test_rx)
         info_string += "\n";
     if (test_rx) {
-        if (rx_info.get("rx_serial") == "")
+        if (rx_info.get("rx_serial").empty())
             rx_serial = "no serial";
         else
             rx_serial = rx_info.get("rx_serial");