Anonymous function syntax

[Jacob Carlborg]

On 2011-09-22 00:17, Walter Bright wrote:
> I've collected a few from various languages for comparison:
>
> D
> (a,b) { return a + b; }
>
> Ruby
> ->(a,b) { a + b }
>
> C++0x
> [](int a, int b) { return a + b; }
>
> C#
> (a,b) => a + b
>
> Scala
> (a:Int, b:Int) => a + b
>
> Erlang
> fun(a, b) -> a + b end.
>
> Haskell
> \a b -> a + b
>
> Javascript
> function(a,b) { return a + b; }
>
> Clojure
> # (+ % %2)
>
> Lua
> function(a,b) return a + b end
>
> Python
> lambda a,b: a + b
>

I vote for the Scala/C# syntax. It's worth noting there's a couple of 
things going on except the syntax that I think is as equally important:

* Inferred parameter types
* Automatically return the last expression
* No need for ending with a semicolon
* One line lambdas can omit the braces

Note that Scala can infer the parameter types.

An additional question, do we want/need a new syntax for declaring 
lambda/delegate types?

-- 
/Jacob Carlborg