Quick note in the discussion: we have already a form of composition with closures, using the right shift operator:
http://mrhaki.blogspot.fr/2011/04/groovy-goodness-chain-closures-together.html?m=1 Le dim. 25 févr. 2018 à 16:02, Jesper Steen Møller <jes...@selskabet.org> a écrit : > Interesting proposal and discussion! > > As somebody who routinely work in both Java, Groovy, TypeScript/ES6 and > C#, I find this *syntactically* too close too arrow functions/lambdas, in > other words, they may confuse a lot of readers. > > As for the *semantic* content: I realize that Groovy goes a long way to > support multiple paradigms, but I feel this is trying to cater to the needs > of concatenative / point-free style programming, in a language and > environment which doesn't really have the functional compositionality to > take advantage of it -- because Groovy is at its heart object-oriented. > > Your proposal is essentially the forward pipe operator |> for function > composition, as seen in a number of functional languages, like F# and Elm > (as "&" in Haskell). In those languages, it makes a lot of sense, since the > function is the primarily compositional building block. In Groovy, it's the > object, and many of the core features of Groovy (like overloading, > extension methods, AST transformations, closures) are added to support > those. In practice, I've seen very little Groovy code which ends up being > formulated as baz(bar(foo(x))) -- but I've seen a lot of > x.foo().bar().baz() instead. It's a better match, and Groovy already has a > great operator "." to make programs easy to read and type > > -Jesper > > On 25 Feb 2018, at 14.38, Daniel.Sun <sun...@apache.org> wrote: > > Hi all, > > I propose to introduce Concatenative Method Calls to Groovy. It can > make code more readable, for example: > > Currently we write method calls like: > y = foo(x) > z = bar(y) > w = baz(z) > OR > w = baz(bar(foo(x))) > > Concatenative Method Calls(inspired by [1]): > w = x => foo => bar => baz > > Any thoughts? > > Cheers, > Daniel.Sun > [1] https://en.m.wikipedia.org/wiki/Concatenative_programming_language > > > > -- > Sent from: http://groovy.329449.n5.nabble.com/Groovy-Dev-f372993.html > > >
