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  • #13844

Closed
Open
Opened Jun 17, 2017 by deech@trac-deech

Surprising behavior with CPP extension

The CPP language extension performs macro substitutions in Haskell comments. I see why it does but it seems like eliding the comments before pre-processing would be less surprising. Eg. compiling:

{-# LANGUAGE CPP -#}

-- | Some folder foo/bar/*

gives the error:

error: unterminated comment
-- | Some folder foo/bar/*

because the /* in the comment is interpreted as starting a C comment.

Trac metadata
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Version 8.0.2
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Compiler
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Architecture
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Reference: ghc/ghc#13844