Name		Name	Last commit message	Last commit date
parent directory ..
README.md		README.md
async.md		async.md
booleans.md		booleans.md
bytevectors.md		bytevectors.md
characters.md		characters.md
equivalence-predicates.md		equivalence-predicates.md
ffs.md		ffs.md
infix-notation.md		infix-notation.md
json.md		json.md
lazy-evaluations.md		lazy-evaluations.md
macros.md		macros.md
numbers.md		numbers.md
numerical-operations.md		numerical-operations.md
pairs-and-lists.md		pairs-and-lists.md
regex.md		regex.md
serialization-deserialization.md		serialization-deserialization.md
sorting.md		sorting.md
symbols.md		symbols.md
tips-and-tricks.md		tips-and-tricks.md
vectors.md		vectors.md

README.md

Otus Lisp

Otus Lisp (Ol in short) is a purely functional dialect of Lisp.

Ol implements an extended subset of the R⁷RS Scheme (PDF), including but not limited to some SRFIs. It's tiny (~ 64KB), embeddable, and cross-platform; provides a portable, high level interface to call code written in another language (c, python, lua, etc).

Reference

This is an Ol reference, not a Scheme. Scheme R⁷RS differences described in the DIFFERENCES file.

Examples are provided in two forms:

in the equivalence (in sense of equal?) form using symbols "==>" and "===",

(+ 1 2 3)  ==>  6
[1 2 3 4]  ===  (make-vector '(1 2 3 4))

in the interactive form using prompt symbol "> ", which shows the behavior as if someone were typing code in an interactive ol session.

> #i1.2
1.199999999

> (let ((N 10000))
      (define (sign n)
         (if (even? n) + -))
      (fold (lambda (f x i)
               ((sign i) f (/ #i4 x)))
         #i4
         (iota N 3 2)
         (iota N 1)))
3.14169264