tree e9cc69a30f48e7286b7d28f91de3777f011eaba8
parent 3472e3f8048857bcec8015898e5afd31a843eb67
author Zhenkai Zhu <zhenkai@cs.ucla.edu> 1338666907 -0700
committer Zhenkai Zhu <zhenkai@cs.ucla.edu> 1338666907 -0700

add validator for prefix