readln.nim

import macros, strutils
export strutils

template parsestring(data): untyped = data

macro readLn*(args: varargs[typed]): untyped =
  let data = genSym(nskLet, "input")
  result = newTree(
    nnkStmtList, 
    quote do:
      let `data` = stdin.readLine().split()
  )
  var i = 0
  for arg in args:
    # parseType proc, e.g.: parseint or parsefloat
    let parseProc = !("parse" & $arg.getTypeImpl())
    
    result.add quote do:
      `arg` = `parseProc`(`data`[`i`])
    
    inc i
  
  echo result.toStrLit

var 
  a: int
  b: float
  c: bool
  d: string
  e: uint

# try to enter:
# 5 3.12431 false helloworldhowareyou 15991991921
readLn(a, b, c, d, e)

echo a
echo b
echo c
echo d
echo e