reorganize module

_archive/rhai_engine/rhaibook/rust/functions-metadata.md

@@ -0,0 +1,20 @@
+Get Scripted Functions  Metadata from AST
+=========================================
+
+{{#include ../links.md}}
+
+Use [`AST::iter_functions`](https://docs.rs/rhai/latest/rhai/struct.AST.html#method.iter_functions)
+to iterate through all the script-defined [functions] in an [`AST`].
+
+
+`ScriptFnMetadata`
+------------------
+
+The type returned from the iterator is `ScriptFnMetadata` with the following fields:
+
+| Field      |   Requires   |    Type     | Description                                                           |
+| ---------- | :----------: | :---------: | --------------------------------------------------------------------- |
+| `name`     |              |   `&str`    | Name of [function]                                                    |
+| `params`   |              | `Vec<&str>` | Number of parameters                                                  |
+| `access`   |              | `FnAccess`  | • `FnAccess::Public` (public)<br/>• `FnAccess::Private` ([`private`]) |
+| `comments` | [`metadata`] | `Vec<&str>` | [Doc-comments], if any, one per line                                  |