# Custom warnings or compiler errors?

**URL:** <https://forum.kirupa.com/t/custom-warnings-or-compiler-errors/242995>\
**Category:** flash\
**Created:** [November 1, 2007, 2:50pm UTC](https://forum.kirupa.com/t/custom-warnings-or-compiler-errors/242995 "2007-11-01T14:50:06Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Rezmason](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/rezmason/32/30447_2.png) [@Rezmason](https://forum.kirupa.com/u/Rezmason)\
**Post date:** [November 1, 2007, 2:50pm UTC](https://forum.kirupa.com/t/custom-warnings-or-compiler-errors/242995/1 "2007-11-01T14:50:06Z")

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Is there a way for a library developer to throw warnings or compiler errors to prevent improper implementation of a class?

Wow. That’s the first straightforward question I’ve asked you folks in a while. (-: