Switch to public/private variables model

Now unqualified variables are project-private and can be typified.

1 files changed, 14 insertions, 1 deletions

diff --git a/libbuild2/variable.ixx b/libbuild2/variable.ixx
index a84c012..7cafd89 100644
--- a/libbuild2/variable.ixx
+++ b/libbuild2/variable.ixx
@@ -916,8 +916,21 @@ namespace build2
   inline const variable* variable_pool::
   find (const string& n) const
   {
+    // The pool chaining semantics for lookup: first check own pool then, if
+    // not found, check the outer pool.
+    //
     auto i (map_.find (&n));
-    return i != map_.end () ? &i->second : nullptr;
+    if (i != map_.end ())
+      return &i->second;
+
+    if (outer_ != nullptr)
+    {
+      i = outer_->map_.find (&n);
+      if (i != outer_->map_.end ())
+        return &i->second;
+    }
+
+    return nullptr;
   }
 
   // variable_map