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9146 :: Wierd behaviour with table

• foderking (orginal) [2022-05-07T18:44:34+02:00] view original

  I have a table in a separate file a.nim

  import std/tables
  
  
  let
    lookupTestTable* = {
     "A1": """ 0 0 0 0 0 0 0 0
   0 0 0 0 0 0 0 0
   0 0 0 0 0 0 0 0
   0 0 0 0 0 0 0 0
   0 0 0 0 0 0 0 0
   0 0 0 0 0 0 0 0
   1 1 0 0 0 0 0 0
   0 1 0 0 0 0 0 0""",
      "B1": """ 0 0 0 0 0 0 0 0
   0 0 0 0 0 0 0 0
   0 0 0 0 0 0 0 0
   0 0 0 0 0 0 0 0
   0 0 0 0 0 0 0 0
   0 0 0 0 0 0 0 0
   1 1 1 0 0 0 0 0
   1 0 1 0 0 0 0 0"""}.toTable
  Run

  I want to use that table in another file b.nim.

  But when I import it, It seems to change behavour. If I print the table in its file (a.nim), I get the correct output

  
  {"B1": " 0 0 0 0 0 0 0 0\n 0 0 0 0 0 0 0 0\n 0 0 0 0 0 0 0 0\n 0 0 0 0 0 0 0 0\n 0 0 0 0 0 0 0 0\n 0 0 0 0 0 0 0 0\n 1 1 1 0 0 0 0 0\n 1 0 1 0 0 0 0 0", "A1": " 0 0 0 0 0 0 0 0\n 0 0 0 0 0 0 0 0\n 0 0 0 0 0 0 0 0\n 0 0 0 0 0 0 0 0\n 0 0 0 0 0 0 0 0\n 0 0 0 0 0 0 0 0\n 1 1 0 0 0 0 0 0\n 0 1 0 0 0 0 0 0"}
  Run

  But, when I import it into b.nim, I can't access it's value's by the key. e.g lookupTestTable["B1"]

  I get this strange error

  
  Error: type mismatch: got <Table[system.string, system.string], string>
  but expected one of:
  proc `[]`(s: string; i: BackwardsIndex): char
    first type mismatch at position: 0
  proc `[]`(s: var string; i: BackwardsIndex): var char
    first type mismatch at position: 0
  proc `[]`[I: Ordinal; T](a: T; i: I): T
    first type mismatch at position: 0
  proc `[]`[Idx, T; U, V: Ordinal](a: array[Idx, T]; x: HSlice[U, V]): seq[T]
    first type mismatch at position: 0
  proc `[]`[Idx, T](a: array[Idx, T]; i: BackwardsIndex): T
    first type mismatch at position: 0
  proc `[]`[Idx, T](a: var array[Idx, T]; i: BackwardsIndex): var T
    first type mismatch at position: 0
  proc `[]`[T, U: Ordinal](s: string; x: HSlice[T, U]): string
    first type mismatch at position: 0
  proc `[]`[T; U, V: Ordinal](s: openArray[T]; x: HSlice[U, V]): seq[T]
    first type mismatch at position: 0
  proc `[]`[T](s: openArray[T]; i: BackwardsIndex): T
    first type mismatch at position: 0
  proc `[]`[T](s: var openArray[T]; i: BackwardsIndex): var T
    first type mismatch at position: 0
  template `[]`(s: string; i: int): char
    first type mismatch at position: 0
  
  expression: `[]`(lookupTestTable, "A1")
  Run

  When I print what is inside the table (in b.nim), this is the output

  
  (data: @[(hcode: 0, key: "", val: ""), (hcode: 2437449353, key: "B1", val: " 0 0 0 0 0 0 0 0\n 0 0 0 0 0 0 0 0\n 0 0 0 0 0 0 0 0\n 0 0 0 0 0 0 0 0\n 0 0 0 0 0 0 0 0\n 0 0 0 0 0 0 0 0\n 1 1 1 0 0 0 0 0\n 1 0 1 0 0 0 0 0"), (hcode: 0, key: "", val: ""), (hcode: 0, key: "", val: ""), (hcode: 0, key: "", val: ""), (hcode: 3101379309, key: "A1", val: " 0 0 0 0 0 0 0 0\n 0 0 0 0 0 0 0 0\n 0 0 0 0 0 0 0 0\n 0 0 0 0 0 0 0 0\n 0 0 0 0 0 0 0 0\n 0 0 0 0 0 0 0 0\n 1 1 0 0 0 0 0 0\n 0 1 0 0 0 0 0 0"), (hcode: 0, key: "", val: ""), (hcode: 0, key: "", val: "")], counter: 2)
  
  Run

  What is causing this weird behavour? I've tried changing it to const, var , still the same behavour

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• aEverr (orginal) [2022-05-07T18:47:18+02:00] view original

  you have to also import tables inside module b

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• huantian (orginal) [2022-05-07T18:47:19+02:00] view original

  Did you import tables in the second file as well?

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• Yardanico (orginal) [2022-05-07T18:47:21+02:00] view original

  The reason is that your b.nim module doesn't have access to the std/tables module, so it can't use the Table APIs. There are two ways to fix this:

  1. Add export tables to your a.nim
  2. Add import std/tables to b.nim

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• foderking (orginal) [2022-05-08T00:39:57+02:00] view original

  Thanks. import tables works

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