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, 19 insertions, 0 deletions

diff --git a/cli/parser.hxx b/cli/parser.hxx
index c93b9a0..34d3450 100644
--- a/cli/parser.hxx
+++ b/cli/parser.hxx
@@ -56,6 +56,25 @@ private:
   void
   recover (token& t);
 
+  // Lookup a name in the specified starting scope. Empty scope denotes
+  // the global namespace. Starting scope should be a fully-qualified
+  // name while name can be qualified but should not be fully-qualified
+  // (to lookup a fully-qualified name use the global namespace as the
+  // starting scope).
+  //
+  // If starting unit is not specified, the lookup is performed in the
+  // current unit. It then continues in all the units that the starting
+  // unit includes, transitively.
+  //
+  // The outer flag specifies whether to search the outer scopes.
+  //
+  template <typename T>
+  T*
+  lookup (std::string const& scope,
+          std::string const& name,
+          semantics::cli_unit* unit = 0,
+          bool outer = true);
+
 private:
   bool valid_;
   semantics::path const* path_;