Sdk: Add currying

[DartBot]

_This issue was originally filed by [e-mail]_

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Currying is a well-known (in functional languages) technique of transforming a function that takes multiple arguments (or an n-tuple of arguments) in such a way that it can be called as a chain of functions each with a single argument (partial application).

I propose to add its support into dart. Dart could implement them scala-way to keep both named / optional params and currying:

a = function(params1)(params2)(params3) {
  return params1 + params2 + params3
}

a(5)(6)(7)

[DartBot]

_This comment was originally written by [e-mail]_

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More on scala's currying:
http://www.scala-lang.org/node/135
http://www.codecommit.com/blog/scala/function-currying-in-scala
http://joelneely.wordpress.com/2008/03/22/currying-without-lab-rats/

Haskell: http://www.haskell.org/haskellwiki/Currying

[DartBot]

_This comment was originally written by [e-mail]_

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The Function interface is empty which is silly. It should have a method on it to return a partially applied function just like Function.bind() in JS.

https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Function/bind

var addOne = function(a, b) { return a + b }.bind(1); // This should work in Dart

[dgrove]

_Removed Type-Defect label._
_Added Type-Enhancement, Area-Language labels._

[DartBot]

_This comment was originally written by [email protected]_

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_Added Triaged label._

[gbracha]

_Added WontFix label._

[DartBot]

_This comment was originally written by [e-mail]_

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Sorry, why this is WontFix?