#13853: TypeApplications and record syntax don't mix -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: feature | Status: new request | Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Keywords: | Operating System: Unknown/Multiple TypeApplications | Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- Let's fire up GHCi: {{{ $ ~/Software/ghc-8.2.0.20170507/bin/ghci GHCi, version 8.2.0.20170507: http://www.haskell.org/ghc/ :? for help Loaded GHCi configuration from /Users/rscott/.ghci λ> :set -XTypeApplications -fprint-explicit-foralls λ> import Data.Functor.Identity }}} I can use `TypeApplications` on `Identity` like so: {{{ λ> Identity @Int 42 Identity 42 }}} But not if I try to use record syntax: {{{ λ> Identity @Int { runIdentity = 42 } <interactive>:4:15: error: parse error on input ‘{’ λ> (Identity @Int) { runIdentity = 42 } <interactive>:7:1: error: • Couldn't match expected type ‘Identity a0’ with actual type ‘Int -> Identity Int’ • In the expression: (Identity @Int) {runIdentity = 42} In an equation for ‘it’: it = (Identity @Int) {runIdentity = 42} }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13853 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler