Missing POSIX Functionality

References

POSIX.1-2017 Chapter 2: Shell Command Language

Shell Command Language features known to be missing from `phoenix`

Parameter expansion > This is support for $variables, and this is highest priority.
Compound commands > This is if, case, while, for, etc
Arithmetic expansion
Alias substitution

How to Contribute

Check the README.md file for contributor guidelines.
Additional features will require updates to the parser. Right now there are repeated concerns between buildParserFirstHalf and buildParserSecondHalf which need to be factored out.