Implement option class inheritance

For now multiple, non-virtual inheritance is supported. An option class
can now also be declared abstract using the class c = 0 {...}; syntax.
New option, --exclude-base, controls whether base class information is
present in usage and documentation.

1 files changed, 2 insertions, 1 deletions

diff --git a/cli/lexer.cxx b/cli/lexer.cxx
index baa8423..bf16ce5 100644
--- a/cli/lexer.cxx
+++ b/cli/lexer.cxx
@@ -155,7 +155,8 @@ next ()
             get ();
             return token (token::p_dcolon, c.line (), c.column ());
           }
-          break;
+
+          return token (token::p_colon, c.line (), c.column ());
         }
       case '{':
         {