# Generators that check kind
local def is{k}{x} = match{k, kind{x}}
def knum = is{'number'}
def ksym = is{'symbol'}
def ktup = is{'tuple'}
def kgen = is{'generator'}
def ktyp = is{'type'}
def kcon = is{'constant'}
def kreg = is{'register'}
def kfun = is{'function'}
def klab = is{'label'}
def kblo = is{'block'}