6.10 Single-Unit Modules
When racket/unit is used as a language name with #lang, the module body is treated as a unit body. The body must match the following module-body grammar:
| module-body | = |
| ||||||||
| require-decl | = | (require require-spec ...) | ||||||||
| | | (begin require-decl ...) | |||||||||
| | | derived-require-form |
After any number of require-decls, the content of the module is the same as a unit body.
The resulting unit is exported as base@, where base is derived from the enclosing module’s name (i.e., its symbolic name, or its path without the directory and file suffix). If the module name ends in -unit, then base corresponds to the module name before -unit. Otherwise, the module name serves as base.