CLI2: Pseudo-args demoted to config settings

- When 'limit:N' is encountered, it is removed from the command line, and
  added as a config setting, equivalent to 'rc.limit:N'.
- This simplifieѕ subsequent command line parsing.

src/CLI2.cpp

@@ -506,10 +506,9 @@ void CLI2::lexArguments ()
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-// Scan all args for the 'add' and 'log' commands, and demote any
-// Lexer::Type::Tag args with sign '-' to Lexer::Type::word.
-//
-// TODO This is obsolete, given FILTER, MODIFICATION, MISCELLANEOUS.
+// [1] Scan all args for the 'add' and 'log' commands, and demote any
+//     Lexer::Type::Tag args with sign '-' to Lexer::Type::word.
+// [2] Convert any pseudo args name:value into config settings, and erase.
 void CLI2::demotion ()
 {
   bool changes = false;
@@ -529,6 +528,22 @@ void CLI2::demotion ()
     }
   }
 
+  int count = 0;
+  for (auto& a : _args)
+  {
+    std::string canonical;
+    if (a._lextype == Lexer::Type::pair &&
+        canonicalize (canonical, "pseudo", a.attribute ("name")))
+    {
+      context.config.set (canonical, a.attribute ("value"));
+      changes = true;
+      _args.erase (_args.begin () + count);
+      break;
+    }
+
+    ++count;
+  }
+
   if (changes &&
       context.config.getInteger ("debug.parser") >= 2)
     context.debug (dump ("CLI2::analyze demotion"));
@@ -726,17 +741,6 @@ std::string CLI2::getCommand (bool canonical) const
   return "";
 }
 
-////////////////////////////////////////////////////////////////////////////////
-std::string CLI2::getLimit () const
-{
-  for (auto& a : _args)
-    if (a.hasTag ("PSEUDO") &&
-        a.attribute ("canonical") == "limit")
-      return a.attribute ("value");
-
-  return "0";
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 const std::string CLI2::dump (const std::string& title) const
 {

src/CLI2.h

@@ -81,7 +81,6 @@ public:
   bool canonicalize (std::string&, const std::string&, const std::string&) const;
   std::string getBinary () const;
   std::string getCommand (bool canonical = true) const;
-  std::string getLimit () const;
   const std::string dump (const std::string& title = "CLI2 Parser") const;
 
 private:

src/Context.cpp

@@ -595,7 +595,7 @@ void Context::getLimits (int& rows, int& lines)
   lines = 0;
 
   // This is an integer specified as a filter (limit:10).
-  std::string limit = cli2.getLimit ();
+  std::string limit = config.get ("limit");
   if (limit != "")
   {
     if (limit == "page")