schemelang

Scheme Lang (schemelang)

NodeJS Scheme language interpreter

basic usage

Simply create a new Scheme environnement and use its interpreter method

// ---------
 
const SchemeLang = require('schemelang')
var my_scheme_env = new SchemeLang()
 
// ---------
 
const scheme = my_scheme_env.interpret
 
// ---------
 
scheme("(define a 5)")
console.log(scheme("a"))
// -> 5
 
scheme("(define func (lambda (a b) (+ a b)))")
console.log(scheme("(func 5 3)"))
// -> 8

accessible methods

The schemelang module also gives you access to the parse and handle methods.

• The parse method transforms string commands into JSON arrays

  const parse = new (require('schemelang'))().parse
   
  let command_array = parse("(define a 5)")
  console.log(command_array)
  // -> ["define", "a", 5]

• The handle method uses the command array to execute scheme commands

  const handle = new (require('schemelang'))().handle
   
  handle(["define", "a", ["+", 1, 3]])
  let result = handle("a")
  console.log(result)
  // -> 4

• The interpret method uses the two above methods to parse and handle string scheme commands

  const interpret = new (require('schemelang'))().interpret
   
  interpret('(define a (+ 1 7))')
  let result = interpret('a')
  console.log(result)
  // -> 8