No kind of object does what you want.
You cannot do 3 3
or #x #y
As for [:x | x + 1] 3, what would be the *point* of doing this?
What is the block suppose to *do* with the 3? Do you want to extend this
to [:x :y | x + y] 3 4 ? If not, why not? What about [3+4] "what to put here?"
As for composition, my own library has
( [:x | x + 1] before: [:y | y * 2] ) value: 10 => 22
( [:y | y * 2] after: [:x | x + 1] ) value: 10 => 22
with no magic syntax needed.
The |> operator in F# has been imitated in several other languages.
I've implemented it in my Smalltalk, and tested it, but never bothered to use
it.
Object
methods for: 'combinators'
|> unary
^(unary isMemberOf: NiladicSelector) "isKindOf: Symbol"
ifTrue: [unary send_to: self] "self perform: unary"
ifFalse: [unary value: self]
MonadicBlock
methods for: 'invoking'
collect
^[:collection | collection collect: self]
do
^[:collection | collection do: self]
reject
^[:collection | collection reject: self]
select
^[:collection | collection select: self]
NiladicSelector
methods for: 'invoking'
collect
^[:collection | collection collect: [:each | each perform: self]]
do
^[:collection | collection do: [:each | each perform: self]]
reject
^[:collection | collection reject: [:each | each perform: self]]
select
^[:collection | collection select: [:each | each perform: self]]
10 |> [:x | x+1] |> [:y | y*2] ==> 22
#(1 2 3) |> [:x | x * 10] collect => #(10 20 30)
