Add notion of ad hoc group, use to handle DLL/import library

1 files changed, 14 insertions, 0 deletions

diff --git a/build2/scope b/build2/scope
index ad9c3a0..3649aa1 100644
--- a/build2/scope
+++ b/build2/scope
@@ -218,6 +218,20 @@ namespace build2
     const target_type*
     find_target_type (name&, const string*& ext) const;
 
+    // Dynamically derive a new target type from an existing one. Return the
+    // reference to the target type and an indicator of whether it was
+    // actually created.
+    //
+    pair<reference_wrapper<const target_type>, bool>
+    derive_target_type (const string& name, const target_type& base);
+
+    template <typename T>
+    pair<reference_wrapper<const target_type>, bool>
+    derive_target_type (const string& name)
+    {
+      return derive_target_type (name, T::static_type);
+    }
+
     // Rules.
     //
   public: