... AST¹

The information between brackets shows the attribute for TERMINAL nodes

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... rule²

As it appears in the .output file. The .output file can be generated using the -v option of eyapp

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... production³

If the production has an explicit name. Otherwise there is no re-blessing

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... subroutine⁴

The sub must be accessed through a proxy Parse::Eyapp::YATW object. YATW stands for Yet Another Tree Walker

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... Parse::Eyapp::Node⁵

All the classes in the AST inherit from Parse::Eyapp::Node

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... verbatim⁶

Without the outer curly brackets. If it weren't for the second pair of curly brackets the lexical variable $num would be visible up to the end of the file

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... $INDENT⁷

Other Parse::Eyapp::Node variables governing the behavior of str are: PREFIXES, $STRSEP, $FOOTNOTE_HEADER, $FOOTNOTE_SEP, $FOOTNOTE_LEFT, $FOOTNOTE_RIGHT and $LINESEP

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... bud⁸

Bottom-Up Decorator

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... matches⁹

When bud is applied the family of transformations must constitute a partition of the AST classes, i.e. for each node one and only one transformation matches

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