### RFIX

coerce to a rational number
Major Section: ACL2-BUILT-INS

`Rfix`

simply returns any rational number argument unchanged,
returning `0`

on a non-rational argument. Also see nfix,
see ifix, see realfix, and see fix for analogous
functions that coerce to a natural number, an integer, a real, and a
number, respectively.

`Rfix`

has a guard of `t`

.

To see the ACL2 definition of this function, see pf.