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GHC 10.0.0.20260917 · lts/ghc-10.0.x · 8fef28d · 2026-11-02

When we are given files (modified by -x arguments) we need to determine if they are Haskellish or not to figure out how we should try to compile it. The rules are:

  1. If no -x flag was specified, we check to see if the file looks like a module name, has no extension, or has a Haskell source extension.

  2. If an -x flag was specified, we just make sure the specified suffix is a Haskell one.