Start of a PEG for Tidal

Tidal PEG.js

/*
working towards a gibber-tidal integration, a la: 
https://gist.github.com/charlieroberts/445f2fb1ce3555f04cffc334c2be0b42

test here: https://pegjs.org/online

for more info on pegs and music languages:
https://worldmaking.github.io/workshop_nime_2017/editor.html

currently turns [ 3/4 2(5,8) [0 1 2 3*2] ]
to:
[
   {
      "type": "binop",
      "left": "3",
      "op": "/",
      "right": "4"
   },
   {
      "type": "euclid",
      "pulses": 5,
      "slots": 8
   },
   [
      "0",
      "1",
      "2",
      {
         "type": "binop",
         "left": "3",
         "op": "*",
         "right": "2"
      }
   ]
]
*/

term "term" = body:( binop / euclid / list / word  ) _ { 
  return body
}

list "list" = ( "[" / "{" ) _

body:term* _ ( "]" / "}" ) { return body }

binop = left:word op:op right:word {
  return { type:'binop', left, op, right }
}

word "word" = $[^ \[\] \{\} \t\n\r '*' '/' '+' '-']+

op = '*' / '/' / '+' / '-'

euclid = value:number '(' _ pulses:number ',' _ slots:number ')' {
  return { type:'euclid', pulses, slots }
}

char = number / [a-zA-Z]

number = "-"? (([0-9]+ "." [0-9]*) / ("."? [0-9]+)) { return +text(); }

_ "whitespace" = [ \t\n\r ]*