Fix build with libc++ after #921.
authorNico Weber <nicolasweber@gmx.de>
Mon, 9 Mar 2015 04:46:34 +0000 (21:46 -0700)
committerNico Weber <nicolasweber@gmx.de>
Mon, 9 Mar 2015 04:48:21 +0000 (21:48 -0700)
commit52e667fa3d77d59ed07fa136e5a19f169dc9fc0b
tree8f91db7c8942c1fc8d24da8aeb07742160ae66b3
parentb0c9eab3f67547eb0f6c24721fe002f414505e73
Fix build with libc++ after #921.

It failed with

    error: field has incomplete type 'EvalString'
    note: in instantiation of exception specification for 'map' requested here
      explicit Rule(const string& name) : name_(name) {}
               ^
src/eval_env.h