parsing.txt

What is parsing?
    Turning text (or some other stream of bytes) into a more useful format
        - Turning strings into JSON objects
        - Turning bytes into TCP packet structs
        - Turning strings into some C# object hierarchy

Levels of parsing:
    0 - avoid it -- use some standard format and library (json, xml, etc)
    1 - string indexOf / split
    2 - regex
    3 - parser combinators - pure functions that build simple parsers, compose the functions builds a more complex parser.
        sprache - https://github.com/sprache/Sprache
            users: resharper, octopus
        superpower - https://github.com/datalust/superpower
            users: serilog
        pidgin - https://github.com/benjamin-hodgson/Pidgin
            users: stackoverflow
    4 - parser generator - specify a grammar, and the parser is generated
        yacc/lex - older tools from AT&T
        bison/flex - open source implementation of yacc/lex
        antlr
            users: ASP.NET Web Optimization, Apache Cassandra, Groovy, Hibernate
            http://www.antlr.org/
            examples:
                https://github.com/waf/Donatello/tree/master/src/Donatello.Services/Antlr
                https://github.com/waf/Donatello/blob/master/src/Donatello.Services/Parser/VectorExpression.cs
            tooling:
                https://github.com/antlr/grammars-v4
                https://datapsyche.files.wordpress.com/2014/10/screen-shot-2014-10-24-at-12-44-34-am.png
                http://www.antlr.org/images/antlrdt-v4-plugin.png
            be careful which C# version you choose!
                https://github.com/tunnelvisionlabs/antlr4cs
                https://github.com/antlr/antlr4/tree/master/runtime/CSharp

Non C#:
    - Powershell: just use the above .NET libraries
    - JavaScript: Ohm
        https://ohmlang.github.io/editor/#0a9a649c3c630fd0a470ba6cb75393fe
    - Anything: ANTLR