I'm too sorry about that, but my post client does not compatible with Haskell: it replace all occurence of backquotes by ordinary quotes. Please, replace them back when look at my letter :(( Alexander Dakhov.
> Hello, dear list members! > I'm just a Haskell newbie, but I want to make some proposal to Haskell'. > There are some tickets in tracking system, that inspired by conflict between > binary operators and other use of the same lexeme. At least I found 3 of > that: "get rid of unary '-' operator" > (http://hackage.haskell.org/trac/haskell-prime/ticket/50), "Eliminate . as an > operator" (http://hackage.haskell.org/trac/haskell-prime/ticket/20) and > "Replace the array indexing operator, '!'" > (http://hackage.haskell.org/trac/haskell-prime/ticket/96). > IMHO, all specified problems may be made less embarrassing - if not > completly solved - if Haskell' have some way to solve lexical ambiguity in > concrete position. As for those problems have similar lexical construct > (binary operator) on one side - and different construct on other side: so > this solution must take place over binary operators. > I propose to use the same construct, that always used to convert function > application to binary operator: backquoting. Any lexeme, bounded by > backquotes, will be treated by grammar as binary operator; and no special > grammatic case can be applied. So: >('-'1) is operator section, \x -> x-1, while (-1) is >negative number >('-'y) is operator section, \x -> x-y, while (-y) is unary >function application, negate y >foo '-'1 has two arguments, (-) and 1, while foo -1 has one >argument, -1 >F'.'g is composition of function and constructor, while F.g is >qualified function name >('!'x) is operator section, while !x is bang >pattern (or strictness annotation). > I think, this proposal does not require neither big changes in Haskell > grammar, nor it ruins any existing code. > > Alexander Dakhov. >_______________________________________________ >Haskell-prime mailing list >Haskell-prime@haskell.org >http://www.haskell.org/mailman/listinfo/haskell-prime _______________________________________________ Haskell-prime mailing list Haskell-prime@haskell.org http://www.haskell.org/mailman/listinfo/haskell-prime
