2.3.16 Byte-Code Function Type ------------------------------ “Byte-code function objects” are produced by byte-compiling Lisp code (Byte Compilation). Internally, a byte-code function object is much like a vector; however, the evaluator handles this data type specially when it appears in a function call. Byte-Code Objects. The printed representation and read syntax for a byte-code function object is like that for a vector, with an additional ‘#’ before the opening ‘[’.