class Cucumber::CucumberExpressions::TreeRegexp
Attributes
group_builder[R]
regexp[R]
Public Class Methods
new(regexp)
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# File lib/cucumber/cucumber_expressions/tree_regexp.rb, line 9 def initialize(regexp) @regexp = regexp.is_a?(Regexp) ? regexp : Regexp.new(regexp) stack = [GroupBuilder.new] group_start_stack = [] last = nil escaping = false non_capturing_maybe = false @regexp.source.split('').each_with_index do |c, n| if c == '(' && !escaping stack.push(GroupBuilder.new) group_start_stack.push(n+1) non_capturing_maybe = false elsif c == ')' && !escaping gb = stack.pop group_start = group_start_stack.pop if gb.capturing? gb.source = @regexp.source[group_start...n] stack.last.add(gb) else gb.move_children_to(stack.last) end non_capturing_maybe = false elsif c == '?' && last == '(' non_capturing_maybe = true elsif c == ':' && non_capturing_maybe stack.last.set_non_capturing! non_capturing_maybe = false elsif c == '<' && non_capturing_maybe raise CucumberExpressionError.new("Named capture groups are not supported. See https://github.com/cucumber/cucumber/issues/329") end escaping = c == '\\' && !escaping last = c end @group_builder = stack.pop end
Public Instance Methods
match(s)
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# File lib/cucumber/cucumber_expressions/tree_regexp.rb, line 47 def match(s) match = @regexp.match(s) return nil if match.nil? group_indices = (0..match.length).to_a.to_enum @group_builder.build(match, group_indices) end