For the `racket' language, I'd like to introduce `hash', `hasheq', and
`hasheqv' constructors. They'd be just like `make-immutable-hash', etc,
but they'd take the content of the hash as arguments that are
alternately keys and values (so always an even number of arguments).
For example,
(hash 1 'a
2 'b
3 'c)
would be the same as
(make-immutable-hash (list (cons 1 'a) (cons 2 'b) (cons 3 'c)))
which, since the keys and values are all literals in that example,
could also be written as
'#hash((1 . a) (2 . b) (3 . c))
Having `hash' seems nice and in parallel to `list', `vector', `string',
`set', etc.
Ok?
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