Improve parsing and display of escapes and nonprinting characters

mdaines / grammophone

A tool for analyzing and transforming context-free grammars.

https://mdaines.github.io/grammophone

MIT License

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Closed mdaines closed 9 months ago

mdaines commented 9 months ago

Addresses #46 and #47.

Escapes in symbols are interpreted when parsing. For example, "\\" will be interpreted as a single backslash.
Nonprinting characters such as spaces and control characters are displayed with a different style.
The space placeholder is now ␣ "OPEN BOX".
Nonprinting characters that are usually escaped with a C-style escape are displayed in that form. For example, \n.