Mirror of forum.nim-lang.org

6557 :: map change

• tmsa04 (orginal) [2020-07-19T03:39:29+02:00] view original

  import options, sequtils

  var str_seq: seq[string] str_seq = @["a1", "b2", "c3", "d4", "e5", "f6"] echo str_seq echo (str_seq.map(some) & none(string))

  Outputs: @["a1", "b2", "c3", "d4", "e5", "f6"] @[Some("a1"), Some("b2"), Some("c3"), Some("d4"), Some("e5"), Some("f6"), None[string]]

  Upgrading from nim-1.2.0-1-x86_64.pkg.tar.zst to nim-1.2.4-1-x86_64.pkg.tar.zst means this does not compile: Error: type mismatch: got <seq[string], proc (val: T): Option[some.T]{.inline.}> but expected one of:

  proc mapT, S: seq[S]

  first type mismatch at position: 2 required type for op: proc (x: T): S{.closure.} but expression 'some' is of type: proc (val: T): Option[some.T]{.inline.}

  2 other mismatching symbols have been suppressed; compile with --showAllMismatches:on to see them

  expression: map(str_seq, some)

  What is the recommended solution so it works as before?

---

• Yardanico (orginal) [2020-07-19T03:43:46+02:00] view original

  import options, sequtils var mySeq = @["a1", "b2", "c3", "d4", "e5", "f6"] echo mySeq let myOptSeq = mySeq.mapIt(some(it)) & none(string) echo myOptSeq

  Run

---

• gemath (orginal) [2020-07-19T09:49:13+02:00] view original

  There should be an automatic "conversion" of proc {.inline.} to a value of type proc {.closure.} which just wraps the inline call in a closure.

---

• tmsa04 (orginal) [2020-07-19T17:21:17+02:00] view original

  mapIt has fixed the issue, thank you.

---