{.experimental.}
import strutils,sequtils,macros,osproc
const p = @[
  "echo 'threads:on' > nim.cfg",
  "echo 'threads:on' > ../nim.cfg",
]
const str = p.mapIt(gorge(it))
echo str
template hoge() = 
  import math,threadpool
  proc term(k: float): float = 4 * math.pow(-1, k) / (2*k + 1)
  proc pi(n: int): float =
    var ch = newSeq[float](n+1)
    parallel:
      for k in 0..ch.high:
        ch[k] = spawn term(float(k))
    for k in 0..ch.high:
      result += ch[k]

  let f = formatFloat(pi(5000))
  echo f
hoge()