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 | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |