get_d - look a name up in a dictionary
dict /key get_d -> any
systemdict /PI get_d -> 3.1415...
<</a 1>> /a get -> 1
get_d tries to find /key in the supplied dictionary. If it
is present, the associated value is returned. If /key is
not in the dictionary, an UndefinedNameError is raised
dict - a dictionary
/key - a literal name
UndefinedNameError
Marc-Oliver Gewaltig
/var/www/debian/nest/nest-simulator-2.20.0/sli/slidict.cc