• Features
• Getting Started
• Reference
• FAQ
• Other docs

Features

• Most of the basic features of R7RS small (see doc/r7rs)
• Some of R6RS Standard Libraries and SRFIs (see doc/conformance)
• First-class continuation (call/cc)

See doc/reference for full list of functions.

Limitation

There are two limitations that arise from JavaScript. These will not be fixed (it's technically possible to fix but will be very inefficient).

• Strings are immutable
• Integers are not distinguished from float

Macro

BiwaScheme does not have syntax-rules or syntax-case, but has define-macro.

Javascript language interface

• JavaScript object

  • js-eval js-ref, etc.

• Timer

  • (timer proc sec) = setTimeout, etc.
  • (sleep sec)
    • Blocking sleep. (sleep 3) will wait 3 seconds and then BiwaScheme resumes running the rest of the code.

• Console

  • (console-debug obj1 ...) = console.debug

• Browser functions

  • DOM manipulation
  • Events
  • Ajax
  • load js-load

more...

Synchronous interface

Some of the BiwaScheme library functions are implemented as synchronous functions.

For example, (sleep sec) will stop evaluation of Scheme program for sec seconds, and then the rest of the program will be evaluated.

(alert "Hello")
(sleep 3)
(alert "World")  ; Evaluated after 3 seconds

Other synchronous functions are listed below.

• (http-request path) => string
• (http-post path params) => string
• (receive-jsonp url) => string
• (load path)
• (js-load js-path check)
• (wait-for selector event)

You can get rid of JavaScript's "callback hell" using these APIs.

// JavaScript (nested callback)
$.get("/a", function(a){
  $.get("/b", function(b){
    $.get("/c", function(c){
      ...
    }
  }
}

// BiwaScheme
(define a (http-request "/a"))
(define b (http-request "/b"))
(define c (http-request "/c"))
...

SRFIs

BiwaScheme implements some SRFIs (Scheme Requests for Implementation).

• 1 List Utilities
  • partially - iota
• 6 string port
• 8 receive
• 19 time
  • partially
• 27 random
  • partially - random-integer, random-real
• 28 simple format
• 30 multi-line comment (#| ... |#)
• 38 write/ss
  • partially - write/ss
• 43 vector
  • partially - vector-append
• 62 s-expr comment (#;)
• 98 get-environment-variable(s)
  • Node.js only

Node.js support

You can use BiwaScheme on the server-side with npm install biwascheme (more...)