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  • Glasgow Haskell Compiler
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  • #14316

Closed
Open
Opened Oct 04, 2017 by lspitzner@trac-lspitzner

Precedence of type-level operators

a ': b ~ c ': d seems to be parsed as a ': (b ~ (c ': d)). This is kind of unfortunate; It seems to me that (~) having a lower precedence would make more sense, i.e. have it parse as (a ': b) ~ (c ': d).

What //are// the precedences of (~) and XDataKind-lifted operators? The userguide mentions precedences when discussing TypeOperators, but not in combination with DataKinds, or the type-equality-constraint.

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Version 8.2.1
Type FeatureRequest
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Compiler
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Reference: ghc/ghc#14316