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require_relative 'base'
require_relative 'group_converter'
class JsRegex
module Converter
#
# Template class implementation.
#
# Note the inheritance from GroupConverter.
#
class AssertionConverter < JsRegex::Converter::GroupConverter
private
def convert_data
case subtype
when :lookahead, :nlookahead
keep_as_is
when :lookbehind
return keep_as_is if context.es_2018_or_higher?
warn_of_unsupported_feature('lookbehind', min_target: Target::ES2018)
build_passive_group
when :nlookbehind
return keep_as_is if context.es_2018_or_higher?
warn_of_unsupported_feature('negative lookbehind', min_target: Target::ES2018)
else
warn_of_unsupported_feature
end
end
def keep_as_is
build_group(head: pass_through, capturing: false)
end
end
end
end
|
