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  • Glasgow Haskell CompilerGlasgow Haskell Compiler
  • GHCGHC
  • Issues
  • #5948
Closed
Open
Issue created Mar 16, 2012 by Richard Eisenberg@raeDeveloper

Parentheses needed when declaring a type synonym with ':

Consider the following code:

{-# LANGUAGE DataKinds, TypeOperators #-}

type Foo = (Int ': '[])

type Bar = Int ': '[]

The declaration for Foo compiles, while the declaration for Bar fails with a parse error on :.

This is clearly easy to work around, but I thought it was enough of an infelicity to be reported.

Trac metadata
Trac field Value
Version 7.5
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Compiler (Parser)
Test case
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