This library is unstable; compatibility will not be maintained. See Unstable for more information.
Produces a sequence equivalent to (syntax->list lst).
An in-syntax application can provide better performance for syntax iteration when it appears directly in a for clause.
'(#<syntax:2:0 1> #<syntax:2:0 2> #<syntax:2:0 3>)
Produces a sequence whose values are the elements of seq, followed by val repeated.
Produces the sequence of f applied to each element of seq.