libos: Put everything under the os namespace

apps/cat.cpp

@@ -35,7 +35,7 @@ int main(int argc, char** argv)
 {
     StringView filename;
 
-    ArgumentParser parser;
+    os::ArgumentParser parser;
     parser.add_positional_argument(filename, "file"_sv, "-"_sv);
     Vector<StringView> extra_files = parser.parse(argc, argv).value();
 

apps/date.cpp

@@ -9,7 +9,7 @@ int main(int argc, char** argv)
 {
     StringView date;
 
-    ArgumentParser parser;
+    os::ArgumentParser parser;
     parser.add_value_argument(date, 'd', "date"_sv, true);
     parser.parse(argc, argv);
 

apps/edit.cpp

@@ -9,7 +9,7 @@ int main(int argc, char** argv)
     FILE* f;
     StringView pathname;
 
-    ArgumentParser parser;
+    os::ArgumentParser parser;
     parser.add_positional_argument(pathname, "file"_sv, true);
     parser.parse(argc, argv);
 

apps/ls.cpp

@@ -11,7 +11,7 @@ int main(int argc, char** argv)
     bool show_all { false };
     bool show_almost_all { false };
 
-    ArgumentParser parser;
+    os::ArgumentParser parser;
     parser.add_positional_argument(pathname, "directory"_sv, "/"_sv);
     parser.add_switch_argument(show_all, 'a', "all"_sv);
     parser.add_switch_argument(show_almost_all, 'A', "almost-all"_sv);

libos/include/os/ArgumentParser.h

@@ -2,6 +2,8 @@
 #include <luna/StringView.h>
 #include <luna/Vector.h>
 
+namespace os
+{
     class ArgumentParser
     {
       public:
@@ -46,3 +48,4 @@ class ArgumentParser
         Vector<SwitchArgument> m_switch_args;
         Vector<ValueArgument> m_value_args;
     };
+}

libos/src/ArgumentParser.cpp

@@ -2,6 +2,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 
+namespace os
+{
     Result<void> ArgumentParser::add_positional_argument(StringView& out, StringView name, bool required)
     {
         PositionalArgument arg { &out, name, required, {} };
@@ -195,3 +197,4 @@ Result<Vector<StringView>> ArgumentParser::parse(int argc, char* const* argv)
 
         return leftovers;
     }
+}