The Strict Language Pragma

The Strict language pragma switches Haskell from being a lazy-by-default to a strict-by-default language within a single module. It's an experimental extension with a few goals:

  • Allow code that doesn't benefit from laziness to be written in a separate module that's not cluttered with bang patterns.
  • Allow experiments on pure, strict-by-default languages in the style of Haskell, without needing to write a new programming languages.
  • Test whether strictness can be made modular.
  • Investigate how much implementations of lazy and strict languages need to differ.

Examples of the first is numeric and/or array heavy code in the style of Repa. Trac ticket: #8347.


  • Change Haskell to a strict-by-default language.



Last modified 5 years ago Last modified on Sep 30, 2014 6:23:01 PM