nix/doc/manual/rl-next/pipe-operators.md

synopsis	prs
Add `pipe-operators` experimental feature	11131

This is a draft implementation of RFC 0148.

The pipe-operators experimental feature adds <| and |> operators to the Nix language. a |> b is equivalent to the function application b a, and a <| b is equivalent to the function application a b.

For example:

nix-repl> 1 |> builtins.add 2 |> builtins.mul 3
9

nix-repl> builtins.add 1 <| builtins.mul 2 <| 3
7

<| and |> are right and left associative, respectively, and have lower precedence than any other operator. These properties may change in future releases.

See the RFC for more examples and rationale.