hygienic-reader-extension

A racket library for adding hygiene to reader extensions

(extend-reader reader-proc extend-readtable)  →  (-> A ... Any)
  reader-proc      : (-> A ... Any)
  extend-readtable : (-> Readtable #:outer-scope (-> Syntax Syntax) Readtable)

Extends the given reader-proc by making a function that calls it with the current-readtable parameter extended with extend-readtable.

In addition to a readtable, it passes an outer-scope argument to the extend-readtable function, which that function can pass into the readtable procedures it adds. Those readtable procedures should use the hygienic-app function to transform any input syntax objects into the output syntax.

(hygienic-app proc stx #:outer-scope outer-scope)  →  Syntax
  proc        : (-> Syntax Syntax)
  stx         : Syntax
  outer-scope : (-> Syntax Syntax)

Applies proc to stx, but with extra scopes added to the input and output to make it hygienic.

This is meant to be used within a readtable-proc added using the extend-reader function, and the outer-scope argument should come from the outer-scope argument passed to the extend-readtable argument to that function.