commit cfb5802a8016b79bdcceee950492780b4193550a
author Nan Zhou <nanzhoumails@gmail.com> Tue Dec 28 11:02:26 2021 -0800
committer Nan Zhou <nanzhoumails@gmail.com> Tue Dec 28 16:52:00 2021 -0800
tree 7317f922f077f3b43f22c620cad284876581799f
parent bf3cf7514ef6c59e0d91090f62f0ecb042fc9dc0

Modernize use nullptr

NULL => nullptr as per modernize-use-nullptr.

After this change:
```
grep "NULL" -r */*.*pp *.*pp
None
```

Signed-off-by: Nan Zhou <nanzhoumails@gmail.com>
Change-Id: Iecddab6fba06f959866048eff4496310453d0fde

argument.cpp

diff --git a/argument.cpp b/argument.cpp
index 38d3978..35f33e3 100644
--- a/argument.cpp
+++ b/argument.cpp
@@ -29,7 +29,8 @@
 ArgumentParser::ArgumentParser(int argc, char** argv)
 {
     auto option = 0;
-    while (-1 != (option = getopt_long(argc, argv, optionstr, options, NULL)))
+    while (-1 !=
+           (option = getopt_long(argc, argv, optionstr, options, nullptr)))
     {
         if ((option == '?') || (option == 'h'))
         {