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0 pointstechnomancy10y ago0 comments

I feel like it's OK not having rest args if you leave them out in order to support currying, but leaving both out seems really weird for a language that's trying to be functional.

0 comments

yurrriq10y ago

We can have rest args in LFE via something like

    (defmacro foo args
      (do 'something (with args)))

where

    (and (>= (length args) 0)
         (=< (length args) 255))

Note the lack of parentheses around args in the defmacro form.

Edit: Oops, Robert mentioned this, too.

kazinator10y ago

Leaving out rest args supports the syntactic sugar for currying, not currying itself. (Let's call that sugar OAIPA: omission of arguments is partial application.)

Even syntaxes which have OAIPA can (and do) still have optional parentheses to exactly delimit the arguments of a call, and that notation can clearly support variadic args.

Outside of explicit delimiting with parens, OAIPA can work on a variadic function up to its required arguments by considering it to be a function of exactly that number of arguments, and no more.

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