readable-snip<%> : interface?

A readable-snip<%> object is treated specially by the port generated by open-input-text-editor. When a readable-snip<%> object is encountered for the input stream, its read-special method is called to generate the read result for the snip.

(send a-readable-snip read-special   source             line             column             position)   →   any/c

source : any/c

line : (or/c nonnegative-exact-integer? false/c)

column : (or/c nonnegative-exact-integer? false/c)

position : (or/c nonnegative-exact-integer? false/c)

The arguments are the same as the arguments to a procedure returned by a custom input port’s read; see Custom Ports for details. The result is also the same as the result from a read-produced procedure.