In LL, only basic special forms and builtin functions
are directly
understood by the compiler. Often-used builtins that can be defined
via these basic special forms and builtins are contained in the
prelude
which is loaded at system startup.
In the following subsections, the LL builtins will be described. If the reader is familiar with COMMON LISP, most of these subsections may be skipped (except subsection 3.2.3, which describes LL structures).
Only short definitions of the LL builtins are given.
A detailed description can be found in the LISP literature [\protect\citeauthoryearSteele Jr.1984].