gistfile1.nim

import strutils, macros

macro `:=` (a,b:expr): expr {.immediate.} =
  var
    sr = a.toStrLit.strVal # XXX is this even close?
    ids = sr.split(",") 
    source = "var _tmp_arr = " & b.toStrLit.strVal & "\n"
    id,typ,typestring:string

  echo "IN MACRO" # XXX

  for x, idp in ids:
    let pair = idp.split(":")
    id = pair[0]
    typ = pair[1]
    case typ
    of "int":
      typestring = ".parseInt"
    of "float":
      typestring = ".parseFloat"
    else:
      typestring = "" # don't need for "string"
    source.add("$1 = _tmp_arr[$2]$3 ;" % [id,$x,typestring])
  # how to see "source" while debugging

  # how do we REPLACE the line that triggered this macro?
  result = parseStmt(source)

var 
  var1:int
  var2:string
  var3:float

var line = "1,cool,12.12"
var1:int, var2:string, var3:float := line.split(",")

#echo [var1,var2,var3].join("->")