Implement out-qualified target syntax for setting target-specific vars

So now we can do:

doc{INSTALL}@./: install = false

Note that so far that's the only place where we support out-qualification.
Grep for @@ OUT to see other places.

1 files changed, 1 insertions, 1 deletions

diff --git a/build2/target.cxx b/build2/target.cxx
index d9dd12e..a0283b0 100644
--- a/build2/target.cxx
+++ b/build2/target.cxx
@@ -300,7 +300,7 @@ namespace build2
           os << '@' << o;
       }
       else
-        os << '@' << k.out;
+        os << '@' << *k.out;
     }
 
     return os;