Render a list of DeadEnds.

The String is the input to the parser.

This returns a list of "pieces", look at the README for examples of how to combine them.

Describes how to output the various parts of the error message.

A type which encompasses both Parser.DeadEnd and Parser.Advanced.DeadEnd.

Describes how to get the context stack from a DeadEnd and how to extract expectations information from a problem.

You can usually use forParser and forParserAdvanced.

And Extract for the basic Parser.DeadEnd.

And Extract for Parser.Advanced.DeadEnd when the problem is a Parser.Problem.

A problem is often of the form "expected something". This type is used to group those together.

Categorize a Problem in whether it's "expected something" or something else.