[GHC] #9869: Add new notation for negative numbers when using -XNegativeLiterals

[GHC]

#9869: Add new notation for negative numbers when using -XNegativeLiterals
-------------------------------------+-------------------------------------
       Reporter:  bg_                |                   Owner:
           Type:  feature request    |                  Status:  new
       Priority:  low                |               Milestone:
      Component:  Compiler           |                 Version:  7.8.3
       Keywords:                     |        Operating System:
   Architecture:  Unknown/Multiple   |  Unknown/Multiple
     Difficulty:  Unknown            |         Type of failure:
     Blocked By:                     |  None/Unknown
Related Tickets:                     |               Test Case:
                                     |                Blocking:
                                     |  Differential Revisions:
-------------------------------------+-------------------------------------
 I propose that when using -XNegativeLiterals ghc should also read ~123 as
 a negative literal. SML uses ~ as the unary minus it, so it's not
 completely out of the blue. The reason would be to minimize ambiguity.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9869>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler