Release 2.6.0

PEG parser improvements, and default EBNF parser is now the PEG version.

• CI on Ruby 3.3.
• Add dependency on base64 gem.
• Revise logging to use standard RDF log facility.
• Example JSON grammars

EBNF grammar ambiguity

• Allow angle brackets around EBNF symbols. (Fixes #15).
• Parsers determine the if grammar rules start with an identifier followed by a symbol and dynamically set the terminal regular expressions accordingly. Subsequent rules must either all begin with an identifier, or only a symbol.

PEG parser

• Add informative/progress output for entry to productions as well as exit.
• Pass options recursively to parsers, and allow handlers to specify options. (Used for ignore_strings).
• Check for terminals that also match a string production but match longer than that string; they should not match.
• Add some missing unscans to PEG rule parser.

Release 2.5.0

• Keep single-quote and double-quote strings separate. (Depends on updated support in SXP 2.0).
• Fix unescaping strings in native parser containing ECHARs or UCHARs.

Release 2.4.0

• Updates to version 2.4.0, depends on RDF.rb 3.3 and Ruby 3.
• Update Nokogiri to 1.15 (>= 1.15.4) to address critical vulnerabilities.

Release 2.3.5

• Use wider range of escapes for showing character escapes in HTML.

Release 3.2.4

• Fix line folding on alt in HTML.
• Mark other EBNF strings using grammar-literal in HTML output.
• Mark declarations in HTML output with a class to allow CSS targeting.

Release 3.2.3

• Add HTML classes to some grammar code elements.
• Fix native parsing of RANGE containing a backslash.

Release 3.2.2

Updates for ABNF:

• Correct the ABNF example.
• Fix bug writing ABNF to HTML.
• ABNF HEX representation is upper case.
• Rept spacing.

Other:

• Fix document YAML.
• Fix problem loading Nokogiri in writer when validating.

Release 2.3.1

ABNF improvements (@AaronLasseigne)

• fix code examples for parsing alternate formats.
• escape troublesome characters in regexp expressions.

Also:

• Update documentation links to use gh-pages, and add action to publish gh-pages from Yard docs.

Release 2.3.0

• Minimum Ruby version now 2.5.
• Don't use bundler for 'ebnf' cli, which interferes when used in projects.

Release 2.2.0

• Don't use Nokogumbo directly, as it's included in Nokogiri >= 1.12.
• Move string unescaping from LL1::Lexter to new Unescape module.
• Implement :unescape option to PEG terminals.
• Allow start_production for PEG to specify case insensitive_strings, mapping to either :upper or :lower. Transforms the matched string component of a production to either upper or lower case.