tree fe025ff57f3e2aa61b2af6553323a7b2fa253859
parent 2182e22ec64dbf0269483b33bdf00a5a50d9886f
author Christopher Kohlhoff <chris@kohlhoff.com> 1368345947 +1000
committer Christopher Kohlhoff <chris@kohlhoff.com> 1368345947 +1000

Use operator[] rather than operator(), to avoid potential confusion from
having use_future look like a function object.