Nim/tests/stdlib/tparseutils.nim

discard """
  targets: "c cpp"
"""

import std/[parseutils, sequtils, sugar, formatfloat]
import std/assertions

proc test() =
  let input = "$test{}  $this is ${an{  example}}  "
  let expected = @[(ikVar, "test"), (ikStr, "{}  "), (ikVar, "this"),
                    (ikStr, " is "), (ikExpr, "an{  example}"), (ikStr, "  ")]
  doAssert toSeq(interpolatedFragments(input)) == expected

  var value = 0
  discard parseHex("0x38", value)
  doAssert value == 56

  value = -1
  doAssert(parseSaturatedNatural("848", value) == 3)
  doAssert value == 848

  value = -1
  discard parseSaturatedNatural("84899999999999999999324234243143142342135435342532453", value)
  doAssert value == high(int)

  value = -1
  discard parseSaturatedNatural("9223372036854775808", value)
  doAssert value == high(int)

  value = -1
  discard parseSaturatedNatural("9223372036854775807", value)
  doAssert value == high(int)

  value = -1
  discard parseSaturatedNatural("18446744073709551616", value)
  doAssert value == high(int)

  value = -1
  discard parseSaturatedNatural("18446744073709551615", value)
  doAssert value == high(int)

  value = -1
  doAssert(parseSaturatedNatural("1_000_000", value) == 9)
  doAssert value == 1_000_000

  var i64Value: int64
  discard parseBiggestInt("9223372036854775807", i64Value)
  doAssert i64Value == 9223372036854775807

  block:
    var f: float
    let res = collect:
      for x in ["9.123456789012345+","11.123456789012345+","9.123456789012345-","8.123456789012345+","9.12345678901234-","9.123456789012345"]:
        (parseFloat(x, f, 0), $f)
    doAssert res == @[(17, "9.123456789012344"), (18, "11.123456789012344"),
                      (17, "9.123456789012344"), (17, "8.123456789012344"),
                      (16, "9.12345678901234"), (17, "9.123456789012344")]
test()
static: test()