Suggestion: Syntactic sugar for Maps!

[Lennart Augustsson]

If we introduce map syntax it should be overloaded.  Just as list
syntax should be (and will be once I get some time to do it).

 -- Lennart

On Thu, Nov 27, 2008 at 7:10 PM, Don Stewart <dons at galois.com> wrote:
> dons:
>> circularfunc:
>> > I suggest Haskell introduce some syntactic sugar for Maps.
>> >
>> > Python uses {"this": 2, "is": 1, "a": 1, "Map": 1}
>> >
>> > Clojure also use braces: {:k1 1 :k2 3} where whitespace is comma but
>> > commas are also allowed.
>> >
>> > I find the import Data.Map and then fromList [("hello",1), ("there",
>> > 2)] or the other form that I forgot(because it is to long!) to be to
>> > long...
>> >
>> > So why not {"hello": 1, "there": 2} ?
>> >
>>
>> Well, one problem is that we don't have a definitive Map library. Which
>> kind of Map would you like? IntMap/Map/AVLTree? Some other tree?
>>
>> That said, you could certainly write a little
>> preprocessor/quasiquoting/template haskell for dictionary literals.
>>
>
>
> Perhaps overloaded *dictionary* literal syntax?
> So we could have
>
>    instance Dictionary Map k
>    instance Dictionary IntMap
>    instance Dictionary HashTable
>    instance Dictionary Trie k
>
> etc.
>
> That would be pretty awesome..
>
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