#9224: Add support for binary integer literals -------------------------------------------+------------------------------- Reporter: hvr | Owner: Type: feature request | Status: new Priority: normal | Milestone: 7.10.1 Component: Compiler (Parser) | Version: Keywords: literals | Operating System: Architecture: Unknown/Multiple | Unknown/Multiple Difficulty: Easy (less than 1 hour) | Type of failure: Blocked By: | None/Unknown Related Tickets: | Test Case: | Blocking: -------------------------------------------+------------------------------- Currently, Haskell98/2010 support base-10, base-8 (via `0[oO]`-prefix) and base-16 (via `0[xX]`-prefix) integer literals. I hereby propose to add conditional support for base-2 integers via a `0[bB]`-prefix, controlled via a new `-XBinaryLiterals` language extension flag/pragma. The change to the lexer is trivial (see attached patch), however I'm stuck on the lexer using a 32-bit feature-mask, of which all 32bits are already taken, and I'd need a 33th bit for the `BinaryLiteralsBit` flag. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9224 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler