Functions from values to streams of values.
Common information for folding filters (such as reduce and foreach)
reduce
foreach
Assignment operators, such as =, |= (update), and +=, -=, …
=
|=
+=
-=
Binary operators, such as |, ,, //, …
|
,
//
Function from value to stream of values, such as .[] | add / length.
.[] | add / length
An element of an object construction filter.
