class Prism::MatchLastLineNode

Represents a regular expression literal used in the predicate of a conditional to implicitly match against the last line read by an IO object.

if /foo/i then end
   ^^^^^^

Attributes

flags[R]

protected attr_reader flags: Integer

unescaped[R]

attr_reader unescaped: String

Public Class Methods

new(source, flags, opening_loc, content_loc, closing_loc, unescaped, location) click to toggle source

def initialize: (Integer flags, Location opening_loc, Location content_loc, Location closing_loc, String unescaped, Location location) -> void

# File prism/node.rb, line 12558
def initialize(source, flags, opening_loc, content_loc, closing_loc, unescaped, location)
  @source = source
  @location = location
  @flags = flags
  @opening_loc = opening_loc
  @content_loc = content_loc
  @closing_loc = closing_loc
  @unescaped = unescaped
end

type() click to toggle source

Similar to type, this method returns a symbol that you can use for splitting on the type of the node without having to do a long === chain. Note that like type, it will still be slower than using == for a single class, but should be faster in a case statement or an array comparison.

def self.type: () -> Symbol

# File prism/node.rb, line 12728
def self.type
  :match_last_line_node
end

Public Instance Methods

===(other) click to toggle source

Implements case-equality for the node. This is effectively == but without comparing the value of locations. Locations are checked only for presence.

# File prism/node.rb, line 12734
def ===(other)
  other.is_a?(MatchLastLineNode) &&
    (flags === other.flags) &&
    (opening_loc.nil? == other.opening_loc.nil?) &&
    (content_loc.nil? == other.content_loc.nil?) &&
    (closing_loc.nil? == other.closing_loc.nil?) &&
    (unescaped === other.unescaped)
end

accept(visitor) click to toggle source

def accept: (Visitor visitor) -> void

# File prism/node.rb, line 12569
def accept(visitor)
  visitor.visit_match_last_line_node(self)
end

ascii_8bit?() click to toggle source

def ascii_8bit?: () -> bool

# File prism/node.rb, line 12655
def ascii_8bit?
  flags.anybits?(RegularExpressionFlags::ASCII_8BIT)
end

child_nodes() click to toggle source

def child_nodes: () -> Array[nil | Node]

# File prism/node.rb, line 12574
def child_nodes
  []
end

Also aliased as: deconstruct

closing() click to toggle source

def closing: () -> String

# File prism/node.rb, line 12695
def closing
  closing_loc.slice
end

closing_loc() click to toggle source

attr_reader closing_loc: Location

# File prism/node.rb, line 12620
def closing_loc
  location = @closing_loc
  return location if location.is_a?(Location)
  @closing_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF)
end

comment_targets() click to toggle source

def comment_targets: () -> Array[Node | Location]

# File prism/node.rb, line 12584
def comment_targets
  [opening_loc, content_loc, closing_loc] #: Array[Prism::node | Location]
end

compact_child_nodes() click to toggle source

def compact_child_nodes: () -> Array

# File prism/node.rb, line 12579
def compact_child_nodes
  []
end

content() click to toggle source

def content: () -> String

# File prism/node.rb, line 12690
def content
  content_loc.slice
end

content_loc() click to toggle source

attr_reader content_loc: Location

# File prism/node.rb, line 12613
def content_loc
  location = @content_loc
  return location if location.is_a?(Location)
  @content_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF)
end

copy(flags: self.flags, opening_loc: self.opening_loc, content_loc: self.content_loc, closing_loc: self.closing_loc, unescaped: self.unescaped, location: self.location) click to toggle source

def copy: (?flags: Integer, ?opening_loc: Location, ?content_loc: Location, ?closing_loc: Location, ?unescaped: String, ?location: Location) -> MatchLastLineNode

# File prism/node.rb, line 12589
def copy(flags: self.flags, opening_loc: self.opening_loc, content_loc: self.content_loc, closing_loc: self.closing_loc, unescaped: self.unescaped, location: self.location)
  MatchLastLineNode.new(source, flags, opening_loc, content_loc, closing_loc, unescaped, location)
end

deconstruct()

def deconstruct: () -> Array[nil | Node]

Alias for: child_nodes

deconstruct_keys(keys) click to toggle source

def deconstruct_keys: (Array keys) -> { flags: Integer, opening_loc: Location, content_loc: Location, closing_loc: Location, unescaped: String, location: Location }

# File prism/node.rb, line 12597
def deconstruct_keys(keys)
  { flags: flags, opening_loc: opening_loc, content_loc: content_loc, closing_loc: closing_loc, unescaped: unescaped, location: location }
end

euc_jp?() click to toggle source

def euc_jp?: () -> bool

# File prism/node.rb, line 12650
def euc_jp?
  flags.anybits?(RegularExpressionFlags::EUC_JP)
end

extended?() click to toggle source

def extended?: () -> bool

# File prism/node.rb, line 12635
def extended?
  flags.anybits?(RegularExpressionFlags::EXTENDED)
end

forced_binary_encoding?() click to toggle source

def forced_binary_encoding?: () -> bool

# File prism/node.rb, line 12675
def forced_binary_encoding?
  flags.anybits?(RegularExpressionFlags::FORCED_BINARY_ENCODING)
end

forced_us_ascii_encoding?() click to toggle source

def forced_us_ascii_encoding?: () -> bool

# File prism/node.rb, line 12680
def forced_us_ascii_encoding?
  flags.anybits?(RegularExpressionFlags::FORCED_US_ASCII_ENCODING)
end

forced_utf8_encoding?() click to toggle source

def forced_utf8_encoding?: () -> bool

# File prism/node.rb, line 12670
def forced_utf8_encoding?
  flags.anybits?(RegularExpressionFlags::FORCED_UTF8_ENCODING)
end

ignore_case?() click to toggle source

def ignore_case?: () -> bool

# File prism/node.rb, line 12630
def ignore_case?
  flags.anybits?(RegularExpressionFlags::IGNORE_CASE)
end

inspect() click to toggle source

def inspect -> String

# File prism/node.rb, line 12700
def inspect
  InspectVisitor.compose(self)
end

multi_line?() click to toggle source

def multi_line?: () -> bool

# File prism/node.rb, line 12640
def multi_line?
  flags.anybits?(RegularExpressionFlags::MULTI_LINE)
end

once?() click to toggle source

def once?: () -> bool

# File prism/node.rb, line 12645
def once?
  flags.anybits?(RegularExpressionFlags::ONCE)
end

opening() click to toggle source

def opening: () -> String

# File prism/node.rb, line 12685
def opening
  opening_loc.slice
end

opening_loc() click to toggle source

attr_reader opening_loc: Location

# File prism/node.rb, line 12606
def opening_loc
  location = @opening_loc
  return location if location.is_a?(Location)
  @opening_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF)
end

type() click to toggle source

Sometimes you want to check an instance of a node against a list of classes to see what kind of behavior to perform. Usually this is done by calling ‘[cls1, cls2].include?(node.class)` or putting the node into a case statement and doing `case node; when cls1; when cls2; end`. Both of these approaches are relatively slow because of the constant lookups, method calls, and/or array allocations.

Instead, you can call type, which will return to you a symbol that you can use for comparison. This is faster than the other approaches because it uses a single integer comparison, but also because if you’re on CRuby you can take advantage of the fact that case statements with all symbol keys will use a jump table.

def type: () -> Symbol

# File prism/node.rb, line 12718
def type
  :match_last_line_node
end

utf_8?() click to toggle source

def utf_8?: () -> bool

# File prism/node.rb, line 12665
def utf_8?
  flags.anybits?(RegularExpressionFlags::UTF_8)
end

windows_31j?() click to toggle source

def windows_31j?: () -> bool

# File prism/node.rb, line 12660
def windows_31j?
  flags.anybits?(RegularExpressionFlags::WINDOWS_31J)
end