Parser

- Added static method to scan argv[] for overrides without a parse tree, so
  that any rc:<file> arguments can be used to locate the rc file, load it, and
  proceed with command line parsing which relies on things like rc.dateformat.

src/Parser.cpp

@@ -62,6 +62,26 @@ Parser::~Parser ()
   delete _tree;
 }
 
+////////////////////////////////////////////////////////////////////////////////
+// Static method.
+void Parser::getOverrides (
+  int argc,
+  const char** argv,
+  std::string& rc_file)
+{
+  for (int i = 0; i < argc; ++i)
+  {
+    std::string raw = argv[i];
+    if (raw.length () > 3 &&
+        raw.substr (0, 3) == "rc:")
+    {
+      rc_file = raw.substr (3);
+    }
+
+    // Keep looping, so we capture the last one.
+  }
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // char** argv --> std::vector <std::string> _args
 void Parser::initialize (int argc, const char** argv)

src/Parser.h

@@ -37,6 +37,9 @@ class Parser
 public:
   Parser ();
   ~Parser ();
+
+  static void getOverrides (int, const char**, std::string&);
+
   void initialize (int, const char**);
   void clear ();
   void appendStdin ();