The racket/interaction-info library provides a way to register a langauge’s configuration for a read -eval -print loop and editor.
Instead of providing configuration information directly, the current-interaction-info parameter specifies a module to load, a exported function to call, and data to pass as an argument to the exported function. The result of that function should be another one that accepts two arguments: a symbol indicating the kind of information requested (as defined by external tools), and a default value that normally should be returned if the symbol is not recognized.
For information on defining a new #lang language, see syntax/module-reader.
Added in version 8.3.0.2 of package base.