tree db2bab8b734dfdb015469336c5f26e089ff50531
parent 7fc8c4d98a8a3d424f314c3f635a85f446fec3ef
author buyingyi <buyingyi@gmail.com> 1369180458 -0700
committer buyingyi <buyingyi@gmail.com> 1369180458 -0700

add runtime type check for the evaluatation results of boolean expressions