/usr/lib/ruby/vendor_ruby/action_dispatch/journey/path/pattern.rb is in ruby-actionpack 2:4.2.6-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 | require 'action_dispatch/journey/router/strexp'
module ActionDispatch
module Journey # :nodoc:
module Path # :nodoc:
class Pattern # :nodoc:
attr_reader :spec, :requirements, :anchored
def self.from_string string
new Journey::Router::Strexp.build(string, {}, ["/.?"], true)
end
def initialize(strexp)
@spec = strexp.ast
@requirements = strexp.requirements
@separators = strexp.separators.join
@anchored = strexp.anchor
@names = nil
@optional_names = nil
@required_names = nil
@re = nil
@offsets = nil
end
def build_formatter
Visitors::FormatBuilder.new.accept(spec)
end
def ast
@spec.grep(Nodes::Symbol).each do |node|
re = @requirements[node.to_sym]
node.regexp = re if re
end
@spec.grep(Nodes::Star).each do |node|
node = node.left
node.regexp = @requirements[node.to_sym] || /(.+)/
end
@spec
end
def names
@names ||= spec.grep(Nodes::Symbol).map { |n| n.name }
end
def required_names
@required_names ||= names - optional_names
end
def optional_names
@optional_names ||= spec.grep(Nodes::Group).flat_map { |group|
group.grep(Nodes::Symbol)
}.map { |n| n.name }.uniq
end
class RegexpOffsets < Journey::Visitors::Visitor # :nodoc:
attr_reader :offsets
def initialize(matchers)
@matchers = matchers
@capture_count = [0]
end
def visit(node)
super
@capture_count
end
def visit_SYMBOL(node)
node = node.to_sym
if @matchers.key?(node)
re = /#{@matchers[node]}|/
@capture_count.push((re.match('').length - 1) + (@capture_count.last || 0))
else
@capture_count << (@capture_count.last || 0)
end
end
end
class AnchoredRegexp < Journey::Visitors::Visitor # :nodoc:
def initialize(separator, matchers)
@separator = separator
@matchers = matchers
@separator_re = "([^#{separator}]+)"
super()
end
def accept(node)
%r{\A#{visit node}\Z}
end
def visit_CAT(node)
[visit(node.left), visit(node.right)].join
end
def visit_SYMBOL(node)
node = node.to_sym
return @separator_re unless @matchers.key?(node)
re = @matchers[node]
"(#{re})"
end
def visit_GROUP(node)
"(?:#{visit node.left})?"
end
def visit_LITERAL(node)
Regexp.escape(node.left)
end
alias :visit_DOT :visit_LITERAL
def visit_SLASH(node)
node.left
end
def visit_STAR(node)
re = @matchers[node.left.to_sym] || '.+'
"(#{re})"
end
end
class UnanchoredRegexp < AnchoredRegexp # :nodoc:
def accept(node)
%r{\A#{visit node}}
end
end
class MatchData # :nodoc:
attr_reader :names
def initialize(names, offsets, match)
@names = names
@offsets = offsets
@match = match
end
def captures
(length - 1).times.map { |i| self[i + 1] }
end
def [](x)
idx = @offsets[x - 1] + x
@match[idx]
end
def length
@offsets.length
end
def post_match
@match.post_match
end
def to_s
@match.to_s
end
end
def match(other)
return unless match = to_regexp.match(other)
MatchData.new(names, offsets, match)
end
alias :=~ :match
def source
to_regexp.source
end
def to_regexp
@re ||= regexp_visitor.new(@separators, @requirements).accept spec
end
private
def regexp_visitor
@anchored ? AnchoredRegexp : UnanchoredRegexp
end
def offsets
return @offsets if @offsets
viz = RegexpOffsets.new(@requirements)
@offsets = viz.accept(spec)
end
end
end
end
end
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