howto

The "!" is shown in the section below:

`When Boolean is called with argument value, the following steps are taken:

Let b be ! ToBoolean(value).

If NewTarget is undefined, return b.

Let O be ? OrdinaryCreateFromConstructor(NewTarget, "%BooleanPrototype%", « [[BooleanData]] »).

Set O.[[BooleanData]] to b.

Return O.`

The finished project does not work on my machine (Debian 10). After entering mix phx.server I was prompted to install rebar3, which I did. Entering mix phx.server gets me this error:

function :crypto.hmac/3 is undefined or private 

Some of features would be really awesome to have in the next release 🚀:

• Parser: Handle single-quoted strings.
• Parser: Other improvements to make sure parser's first step always return correct number of tokens.
• Parser: Handle advanced syntax of options: grouped options, option using =
• Parser: Handle arguments with isOptional, isPersistent, isRepeatable, etc, diff