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  • Glasgow Haskell CompilerGlasgow Haskell Compiler
  • GHCGHC
  • Issues
  • #9889
Closed
Open
Issue created Dec 16, 2014 by Richard Eisenberg@raeDeveloper

Pattern synonym does not work in top-level pattern bind

When I say

{-# LANGUAGE PatternSynonyms #-}
pattern Id x = x

Id x = True

I get

    Not in scope: data constructor ‘Id’

This happens with both 7.8.3 and HEAD.

Edited Mar 10, 2019 by Gergő Érdi
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