Work with Rell modules

Splitting a dapp into modules keeps the codebase organized and easier to maintain as it grows.

To turn a file into a module, put the module; keyword at its top. The module takes its name from the file name. The exception is a file called module.rell: it makes the whole folder a module, named after that folder. Sub-modules come from nesting folders inside a module, or from adding another file in the same folder that declares module;.

Consider the following:

module;

The result is a module named main.

module;

The result is again a module named main.

Suppose you add another file, src/main/bar.rell, with no module declaration. Its contents join the main module. Declaring the file as a module changes that:

module;

Now it is a separate sub-module, main.bar.

Apply this pattern to build up a modular layout for your project.