Modules

Oneway's module system is file-based and conventionally driven. There is no mod declaration, no manifest of what's in scope.

File Rules

Files are named snake_case.ow.
A file's name must match the type it declares: foo.ow must declare a type named Foo.
A module is a folder. There is no mod keyword.
The entry point is main.ow. A library's root is lib.ow.

To use a type defined in a sibling file, write:

use Foo

This imports Foo from foo.ow (or from the corresponding folder if Foo is a module). No paths, no aliasing.

Multiple use statements at the top of a file must be in alphabetical order.

examples/multifile/
├── greeter.ow
└── main.ow

greeter.ow:

Greeter = String

Greeter.shout = () -> String {
    "HELLO from greeter"
}

main.ow:

use Greeter

main = (Stdout) -> Noop {
    Greeter("hi").shout().print(Stdout)
}

Run it with:

just example multifile

Everything is public by default. To make a method private to its declaring file, prefix it with *:

Type.*helper = () -> Noop {
    ...
}

There is no pub keyword and no per-item visibility annotation beyond that single prefix.