#3306: Improve syntax for GADT + records -------------------------------------+------------------------------------- Reporter: simonpj | Owner: simonpj Type: feature request | Status: closed Priority: normal | Milestone: 6.12.1 Component: Compiler | Version: 6.10.2 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by Ben Gamari ): In [changeset:"30c981e135033840fe1b4bcab697b412369739d7/ghc" 30c981e1/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="30c981e135033840fe1b4bcab697b412369739d7" Removed deprecated syntax for GADT constuctors. Old syntax was deprecated 6 years ago in this commit 432b9c9322181a3644083e3c19b7e240d90659e7 by simonpj:"New syntax for GADT-style record declarations, and associated refactoring" discussed in Trac #3306. This patch removes 2 reduce/reduce conflicts in parser. Conflicting productions were: ``` gadt_constr -> con_list '::' sigtype gadt_constr -> oqtycon '{' fielddecls '}' '::' sigtype ``` Recursive inlining of `con_list` and `oqtycon` helped reveal the conflict: ``` gadt_constr -> '(' CONSYM ')' '::' sigtype gadt_constr -> '(' CONSYM ')' '{' fielddecls '}' '::' sigtype ``` between two types of GADT constructors (second form stands for deprecated syntax). Test Plan: `make fasttest`, one breakage TEST="records-fail" (parse error instead of typecheck error due to removal of deprecated syntax). Updated test. Reviewers: simonmar, bgamari, austin, simonpj Reviewed By: simonpj Subscribers: thomie, mpickering, trofi Differential Revision: https://phabricator.haskell.org/D1118 GHC Trac Issues: #3306 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/3306#comment:9 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler