Mostly follows R7RS syntax definitions, including the following:
correct coloring of R7RS numerical constants, identifiers, strings, and characters
support for #; comments
support for vectors, bytevectors, quoted and backquoted forms
additional definition and syntax keywords from earlier standards and #F
support for #& box syntax
(color theme is available as scheme-r7rs-light)
Initial release of the extension
Known colorizer problems (most probably cannot be easily fixed):
colorizer gets confused by datum prefixes such as ` ' , ,@ #& if the datum that follows is separated by newlines or comments
definition coloring can be easily fooled by newlines and/or comments in the first two sub-forms
#; comments use relaxed grammar and may be colored incorrectly in some corner cases
coloring of backquoted expressions is not very robust; it fails if double-nested (e.g.`(a `(b ,,c ',,d) e)) or if full forms like (unquote x) are used. Reasonable forms from real code are colored reasonably well.
generally, grammar is relaxed in many places, so some syntax errors won't look like errors (e.g. cons dot can be misplaced).