list-modules 0.1.4

A procedural macro for generating a list of string slices of the names of the modules inside a source code directory of a project.
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# List-Modules Procedural Macro

**WARNING: This crate is domain-specific. The only thing that makes it so
is that you cannot name one of the directory items you are trying to list
"archetypes.rs" (a module folder named "archetypes" is fine). I will try
to fix this ASAP.**

This macro creates a constant string slice list of all the module names
which are children of an indicated crate module folder. Paths are specified
relative to the cargo manifest directory.

For example, calling this macro from `mod.rs` in the following file tree
with `list_modules::here!("parent/");`...

```none
parent/
    mod.rs
    child_1.rs
    child_2/
        mod.rs
        internal.rs
        other_internal/
            ...
        ...
    child_3.rs
    child_4.rs
    ...
    child_N/
        mod.rs
```

...will result in the following list expansion:

```rust
pub const LIST: [&str; N] = [
    "child_1",
    "child_2",
    "child_3",
    ...
    "child_N",
];
```

Note that this is the only guaranteed behavior.