tree 7ec28e751fd0b4deff5791c98b6cc261d7d7b26a
parent 3185b3f001356d18004264409d12ba0c03c19200
author Shawn O. Pearce <sop@google.com> 1307147768 -0700
committer Shawn O. Pearce <sop@google.com> 1307147768 -0700

Define Prolog.BUILTIN constant for the builtin package

This string is used in a number of places, making it a constant
in the Prolog class alongside of Nil simplifies some code.