Comments

Comments are C-style, including /* … */ pairs for block comments and // for comments to the end of the line.

Block comments can be nested.

let /* intruder comment */ name = "Bob";

// This is a very important one-line comment

/* This comment spans
   multiple lines, so it
   only makes sense that
   it is even more important */

/* Fear not, Rhai satisfies all nesting needs with nested comments:
   /*/*/*/*/**/*/*/*/*/
*/

Module Documentation

Comment lines starting with //! make up the module documentation.

They are used to document the containing module – or for a Rhai script file, to document the file itself.

Requires metadata

Module documentation is only supported under the metadata feature.

If metadata is not active, they are treated as normal comments.

//! Documentation for this script file.
//! This script is used to calculate something and display the result.

fn calculate(x) {
   ...
}

fn display(msg) {
   //! Module documentation can be placed anywhere within the file.
   ...
}

//! All module documentation lines will be collected into a single block.

For the example above, the module documentation block is:

//! Documentation for this script file.
//! This script is used to calculate something and display the result.
//! Module documentation can be placed anywhere within the file.
//! All module documentation lines will be collected into a single block.