Nim/tests/template/tgensymregression.nim

discard """
  output: '''[0.0, 0.0, 0.0]
[0.0, 0.0, 0.0, 0.0]
5050
123'''
"""

template mathPerComponent(op: untyped): untyped =
  proc op*[N,T](v,u: array[N,T]): array[N,T] {.inline.} =
    for i in 0 ..< len(result):
      result[i] = `*`(v[i], u[i])

mathPerComponent(`***`)
# bug #5285
when true:
  if true:
    var v1: array[3, float64]
    var v2: array[3, float64]
    echo repr(v1 *** v2)


proc foo(): void =
  var v1: array[4, float64]
  var v2: array[4, float64]
  echo repr(v1 *** v2)

foo()

# bug #5383
import sequtils

proc zipWithIndex[A](ts: seq[A]): seq[(int, A)] =
  toSeq(pairs(ts))

proc main =
  discard zipWithIndex(@["foo", "bar"])
  discard zipWithIndex(@[1, 2])
  discard zipWithIndex(@[true, false])

main()

# bug #5405

proc main2() =
  let s = toSeq(1..100).foldL(a + b)
  echo s

main2()

# bug #5467
import macros

converter int2string(x: int): string = $x

template wrap(body: typed): untyped =
  body

macro makeProc() =
  # Make a template tree
  result = quote do:
    proc someProc* =
      wrap do:
        let x = 123
        # Implicit conversion here
        let s: string = x
        echo s

makeProc()

someProc()

# bug #12193
import macros, strutils

macro gen(T: typedesc): untyped =
  let typeSym = getTypeImpl(T)[1]
  let param = genSym(nskParam, "s")
  let value = nnkBracketExpr.newTree(param, newIntLitNode(0))
  result = newProc(
    name = ident"pack",
    params = [typeSym,
      newIdentDefs(param, nnkBracketExpr.newTree(ident"seq", ident"string"))],
    body = newStmtList(newCall(typeSym, newCall(bindSym"parseInt", value))),
    procType = nnkTemplateDef)
  echo repr result

gen(int)
let i = pack(@["2"])