This is an outdated, experiment project, from my early career.
Have improved significantly, since then. (https://xiggfi.web.app)

#spectrum parser

This is an experimental parser created as a learning exercise.

A parser for expressions based languages with an html visualization: View it in action at: (code is editable. Press button to parse it.) xzzulz.github.com/spectrum
(the visualization in the link may be slightly out of date, respect to the master branch)

MIT license.

A simple expressions grammar is a grammar defined in identities and operators. Expressions are constructed based on identities and operator rules. A single identity is a valid expression. Operators are combinators element, that can form valid expressions by combining with identities:

• identities: symbols that are valid expression by itself.

• operators: symbols that combines with identities or expressions to form valid expressions.