cfunction
src/core/io.c on line 574 , column 1
(xprin to & xs )
Print to a file or other value explicitly (no dynamic bindings ).
The value to print to is the first argument , and is otherwise the
same as `prin` . Returns nil.
(def b @"" )
(xprin b "HOHOHO" )
# => nil
b
# => "HOHOHO"