Mirror of forum.nim-lang.org

3708 :: How to get string representation of int inside of the macros?

• r3d9u11 (orginal) [2018-03-30T19:22:30+02:00] view original

  Hello. I tried to represent int to string inside a macros:

  import macros
  
  macro initNui(a:int): typed =
    result = parseStmt("const b=" & $a)
  
  initNui(1)
  Run

  but I had compilcation error:

  
  unhandled exception: false Invalid node kind nnkIntLit for macros.`$`
  Run

  What I'm doing wrong? How I can to get string representation of int without $ operator?

---

• mashingan (orginal) [2018-03-30T20:09:23+02:00] view original

  add static to the type

  import macros
  
  macro initNui(a: static[int]): typed =
    result = parseStmt("const b = " & $a)
  
  initNui 1
  Run

---

• r3d9u11 (orginal) [2018-03-30T22:23:44+02:00] view original

  many thanks, it works! (I'll try to search and read about static types)

---

• jangko (orginal) [2018-04-02T04:25:25+02:00] view original

  or you can use intVal, strVal, etc on literal nodes

  import macros
  
  macro initNui(a:int): typed =
    result = parseStmt("const b=" & $a.intVal)
  
  initNui(1)
  Run

---

• r3d9u11 (orginal) [2018-04-02T07:48:10+02:00] view original

  cool, thanks for another solution!

---

• Arrrrrrrrr (orginal) [2018-04-02T09:19:11+02:00] view original

  repr works better than $ in macros.

---