9 Modules and Imports
A Shplait program that starts with #lang shplait is a module, and its definitions are all implicitly exported for use by other modules. Use import in a module to import definitions from other modules. The module form adds to a submodule, which is nested inside another module.
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If open is not used, then the last component of module_path (not counting a file suffix, if any), is used to prefix all of the imported names. Use the prefix, then ., then a name exported from the module to use that name. If open is used for the module, then its exported names can be used directly, without a prefix.
The relative_path_string form allows only characters in a file name that are especially portable: a-z, A-Z, 0-9, -, +, _, /, and .. Use the file(path_string) form when a more general, platform-specific path_string is needed.
Some operating systems, such as Windows or macOS, may hide file extensions when listing files. A relative_path_string or path_string must include a file’s extension, if any, which is typically ".rhm".
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