Wisp: Whitespace to Lisp
========================

    define : hello                   (define (hello)
      display "Hello World" ⇒          (display "Hello World"))


    define : hello who               (define (hello who)
      display               ⇒          (display
        string-append                    (string-append
          . "Hello " who                   "Hello " who)))


    defun a : b c                    (defun a (b c) 
      let                              (let         
        : d e                            ((d e)     
          : f               ⇒             ((f)      
            ' g                            '(g)))   
        h i                            (h i)        
        . j                            j))          


Wisp turns indentation based syntax into Lisp. The conversion is homoiconic[^h], generic[^g], and backwards-compatible[^b]. It is inspired by project readable, but tries to keep itself simple (and stupid: just a preprocessor). More information on the [wisp-website][].

[wisp-website]: http://draketo.de/light/english/wisp-lisp-indentation-preprocessor

Usage: ./wisp.py infile.wisp > outfile.lisp

More powerful usage (in case you use unix):

    cat infile.wisp | ./wisp.py - | guile -s /dev/stdin

That converts the infile to scheme and executes it via guile.

Or with bash, extend this to a multiline input:

    while IFS= read in ; do echo "$in" ; done | ./wisp.py - | guile -s /dev/stdin

(finish the input with CTRL-D)
(Note: IFS= ensures that initial blanks are kept)

Also see `./wisp-multiline.sh --help`

License: GPLv3 or later.

[^h]: Wisp is homoiconic because everything you write gets turned into lisp which is homoiconic.

[^g]: Wisp is generic, because it works for any language which uses brackets to start a function call - which is true for most lisps. You simply get rid of the speerwall of parentheses without losing their power.

[^b]: Wisp is backwards compatible, because you can simply use arbitrary lisp code in wisp: Indentation processing skipps expressions in brackets.