Re: [Python-ideas] Enhance definition of functions

July 31, 2013


      On 2013-07-31, at 08:37 , Haoyi Li wrote:
...
I'd like multiline lambdas too, but the syntax is a thorny problem. F# is
the only language I know (are there others?) that allows you to mix
whitespace-delimited and paren-delimited expressions, e.g. with
whitespace-blocks inside parens:
let f n = n + (
   if n % 2 = 0 then
       printf "lol"
       1
   else
       printf "omg"
       2
)
Haskell can do that:

f n = n + (
  case n `mod` 2 of
    0 -> unsafePerformIO $ do
      putStrLn "lol"
      return 1
    1 -> unsafePerformIO $ do
      putStrLn "omfg"
      return 2
  )

although a difference is that it doesn't have statement blocks, only
expressions (`do` blocks are sugar for monadic chain expressions)

Re: [Python-ideas] Enhance definition of functions

Masklinn