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RFC: Extend the |> operator in order to chain tuples. #14476

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RFC: Extend the |> operator in order to chain tuples. #14476

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1 change: 1 addition & 0 deletions base/operators.jl
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Expand Up @@ -202,6 +202,7 @@ copy(x::Union{Symbol,Number,AbstractString,Function,Tuple,LambdaStaticData,

# function pipelining
|>(x, f) = f(x)
|>(xs::Tuple, f) = f(xs...)

# array shape rules

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11 changes: 11 additions & 0 deletions doc/stdlib/base.rst
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Expand Up @@ -664,6 +664,17 @@ Generic Functions
julia> [1:5;] |> x->x.^2 |> sum |> inv
0.01818181818181818

.. function:: |>(xs::Tuple, f)

.. Docstring generated from Julia source
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no it isn't? docstrings need to be put in .jl code for this to be accurate

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I'm sorry, I was away for a while, and haven't catch up to recent doc changes. I just copied it over. Where do I need to put this .jl code then, for this to be true?

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Oooh I get it now! :P

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It's explained in CONTRIBUTING.md


Applies a function to the preceding tuple. This allows for easy function chaining.

.. doctest::

julia> (5, 2) |> divrem |> complex |> float
2.0 + 1.0im

.. function:: call(x, args...)

.. Docstring generated from Julia source
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7 changes: 7 additions & 0 deletions test/operators.jl
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Expand Up @@ -55,3 +55,10 @@ let xs = [[i:i+4;] for i in 1:10]
@test max(xs[1:n]...) == [n:n+4;]
end
end

# function chaining
f_chain(x) = :x
f_chain(xs...) = :xs
@test 1 |> f_chain == :x
@test (1, 2) |> f_chain == :xs
@test ((1, 2),) |> f_chain == :x