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10385 :: Error: cannot open file: stdin

• Ori (orginal) [2023-08-08T04:18:01+02:00] view original

  This kind of thing may have been asked before but I am going to try and ask it anyways. (brand new to nim but understand the similarities to python)

  For some reason and idk why, whenever I try to use stdin I get the following error when compiling: Error: cannot open file: stdin, I am also importing it like usual import stdin. I'm not sure how to fix this.

  Nim version - v2.0.0 Installed via choosenim (curl https://nim-lang.org/choosenim/init.sh -sSf | sh) followed by choosenim update stable and adding export PATH=/home/ori/.nimble/bin:$PATH to my .zshrc file (I use zsh instead of bash.) Everything in terms of configs and anything else would be default.

  Any help on how to fix this isuse? (I can import other things like import strutils, sequtils and import std/strformat)

  Extra note;

  If this is the wrong category then I'm sorry and can move this to the appropriate category in which you say.

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• Ori (orginal) [2023-08-08T04:26:46+02:00] view original

  Answer provided by @bung8954 on discord.

  "stdin {.importc: "stdin", header: "<stdio.h>".}: File it is located in std/syncio module"

  Just do import std/syncio and then you can use stdin.readline()

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• Yardanico (orginal) [2023-08-08T05:21:09+02:00] view original

  I only unmoderated you now, but regardless, that's a weird problem - system does export stdin (see here), maybe your issue was with something else?

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• demotomohiro (orginal) [2023-08-08T09:04:38+02:00] view original

  stdin can be used without importing std/syncio. This code compiles without an error on Nim playground. https://play.nim-lang.org/#ix=4CQb

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• ElegantBeef (orginal) [2023-08-08T09:22:01+02:00] view original

  This sounds like someone is using -d:nimPreviewSlimSystem, somehow unwittingly. So uhhh yea.

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• PMunch (orginal) [2023-08-08T09:23:13+02:00] view original

  To be clear, the error message comes from import stdin. stdin is the name for standard input, ie. what the user types in the terminal or pipes into your program during runtime. Trying to import it as a module makes little sense (although I guess theoretically Nim could support importing standard input and allow you to pipe a module to it during compilation. This has extremely dubious merit however and is almost certainly not what you want to do). So the compiler complains that it can't find the file stdin.nim to import. As mentioned the stdin variable is defined in the std/syncio module, which is imported into system and therefore available without any imports.

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