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1334 :: Enable/disable blocks of code at compile time

• sstirlin (orginal) [2015-06-18T01:02:55+02:00] view original

  Noob question. I want to be able to enable/disable blocks of code depending on what type of build I have (release vs debug, boundChecks on or off, etc). So I want something like this:

  when boundChecks:
      # doing something here that I want turned off when I set boundsCheck=off
  Run

  How do I do this?

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• kirbyfan64sos (orginal) [2015-06-18T01:55:35+02:00] view original

  For release vs. debug:

  when defined(release):
      # release stuff
  else:
      # compiler stuff
  Run

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• filwit (orginal) [2015-06-18T03:48:34+02:00] view original

  @kirbyfan64sos Actually that's wrong, you need to use defined to check for symbols defined in via -d,--define:SYMBOL or config files (like release, debug, etc). Use declared to check for the existence of code symbols (vars, procs, types, ect).

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• kirbyfan64sos (orginal) [2015-06-18T04:00:48+02:00] view original

  @filwit Ah, right. I can never remember the difference between those two...

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• sstirlin (orginal) [2015-06-18T05:54:46+02:00] view original

  I couldn't get declared(boundChecks) to work, but defined(release) works.

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• jibal (orginal) [2015-06-18T07:15:13+02:00] view original

  [The comments above were confusing until I figured out that kirbyfan64sos must have edited his comment after filwit made his.]

  Unfortunately, the options like boundChecks don't seem to be exposed ... it would be nice if they were.

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• Araq (orginal) [2015-06-18T09:43:46+02:00] view original

  when compileOption("boundChecks"): echo "yummy"

  Run

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• sstirlin (orginal) [2015-06-18T17:50:55+02:00] view original

  Beautiful. I confirmed when compileOption("boundChecks") works when the --boundChecks:on|off option is manually passed to the compiler, and also confirmed that release and debug sets this variable automatically. Thanks!

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• jibal (orginal) [2015-06-18T20:14:44+02:00] view original

  A documentation index sure would be useful.

  Looking at http://nim-lang.org/docs/system.html, some other useful when tests are declaredInScope and compiles.

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• Araq (orginal) [2015-06-18T22:04:21+02:00] view original

  You mean like http://nim-lang.org/docs/theindex.html ?

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• jibal (orginal) [2015-06-18T23:14:14+02:00] view original

  Yeah, like that. :-) Thanks. Unfortunately, my zoom level pushed the link to it on the doc page down below the scroll line so I didn't see it. But since it is right there on that page and I'm pretty sure I've seen it mentioned before, I have no excuse.

  Now, if only the entry for when mentioned the built-in compile-time bool functions (defined, declared, declaredInScope, and compileOption) ...

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