This small library lets you see which property values are supported by the regular expression engine of the Ruby version you are running and directly reads out their codepoint ranges from there.
That is, it determines all supported values for \p{value} expressions and what they match.
require 'regexp_property_values' PV = RegexpPropertyValues PV.all # => [<Value name='Alpha'>, <Value name='Blank'>, ...]PV.all_for_current_ruby # => [<Value name='Alpha'>, <Value name='Blank'>, ...]PV['alpha'].supported_by_current_ruby? # => true PV['foobar'].supported_by_current_ruby? # => false PV['AHex'].matched_characters # => %w[0 1 2 3 4 5 6 7 8 9 A B C ...] PV['AHex'].matched_codepoints # => [48, 49, 50, ...] PV['AHex'].matched_ranges # => [48..57, 65..70, 97..102] # Note: #matched_characters is slow for large properties and you # may not want to use it in time-critical code. It also omits surrogates. PV['foobar'].matched_ranges # => RegexpPropertyValues::ErrorIf character_set is installed, you can also do this:
PV['AHex'].character_set # => #<CharacterSet: {48, 49...} (size: 22)># get a Hash of aliases for property names PV.alias_hash # => { <Value name='M'> => <Value name='Mark'>, ... } # download a list of possible properties for the running Ruby version # (only used for .all and .alias_hash, not needed for prop lookup via .[]) PV.update