class Prism::InterpolatedMatchLastLineNode

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

if /foo #{bar} baz/ then end
   ^^^^^^^^^^^^^^^^

Attributes

flags[R]

protected attr_reader flags: Integer

parts[R]

attr_reader parts: Array[StringNode | EmbeddedStatementsNode | EmbeddedVariableNode]

Public Class Methods

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

def initialize: (Integer flags, Location opening_loc, Array[StringNode | EmbeddedStatementsNode | EmbeddedVariableNode] parts, Location closing_loc, Location location) -> void

# File prism/node.rb, line 10626
def initialize(source, flags, opening_loc, parts, closing_loc, location)
  @source = source
  @location = location
  @flags = flags
  @opening_loc = opening_loc
  @parts = parts
  @closing_loc = closing_loc
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 10783
def self.type
  :interpolated_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 10789
def ===(other)
  other.is_a?(InterpolatedMatchLastLineNode) &&
    (flags === other.flags) &&
    (opening_loc.nil? == other.opening_loc.nil?) &&
    (parts.length == other.parts.length) &&
    parts.zip(other.parts).all? { |left, right| left === right } &&
    (closing_loc.nil? == other.closing_loc.nil?)
end

accept(visitor) click to toggle source

def accept: (Visitor visitor) -> void

# File prism/node.rb, line 10636
def accept(visitor)
  visitor.visit_interpolated_match_last_line_node(self)
end

ascii_8bit?() click to toggle source

def ascii_8bit?: () -> bool

# File prism/node.rb, line 10715
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 10641
def child_nodes
  [*parts]
end

Also aliased as: deconstruct

closing() click to toggle source

def closing: () -> String

# File prism/node.rb, line 10750
def closing
  closing_loc.slice
end

closing_loc() click to toggle source

attr_reader closing_loc: Location

# File prism/node.rb, line 10683
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 10651
def comment_targets
  [opening_loc, *parts, closing_loc] #: Array[Prism::node | Location]
end

compact_child_nodes() click to toggle source

def compact_child_nodes: () -> Array

# File prism/node.rb, line 10646
def compact_child_nodes
  [*parts]
end

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

def copy: (?flags: Integer, ?opening_loc: Location, ?parts: Array[StringNode | EmbeddedStatementsNode | EmbeddedVariableNode], ?closing_loc: Location, ?location: Location) -> InterpolatedMatchLastLineNode

# File prism/node.rb, line 10656
def copy(flags: self.flags, opening_loc: self.opening_loc, parts: self.parts, closing_loc: self.closing_loc, location: self.location)
  InterpolatedMatchLastLineNode.new(source, flags, opening_loc, parts, closing_loc, 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, parts: Array[StringNode | EmbeddedStatementsNode | EmbeddedVariableNode], closing_loc: Location, location: Location }

# File prism/node.rb, line 10664
def deconstruct_keys(keys)
  { flags: flags, opening_loc: opening_loc, parts: parts, closing_loc: closing_loc, location: location }
end

euc_jp?() click to toggle source

def euc_jp?: () -> bool

# File prism/node.rb, line 10710
def euc_jp?
  flags.anybits?(RegularExpressionFlags::EUC_JP)
end

extended?() click to toggle source

def extended?: () -> bool

# File prism/node.rb, line 10695
def extended?
  flags.anybits?(RegularExpressionFlags::EXTENDED)
end

forced_binary_encoding?() click to toggle source

def forced_binary_encoding?: () -> bool

# File prism/node.rb, line 10735
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 10740
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 10730
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 10690
def ignore_case?
  flags.anybits?(RegularExpressionFlags::IGNORE_CASE)
end

inspect() click to toggle source

def inspect -> String

# File prism/node.rb, line 10755
def inspect
  InspectVisitor.compose(self)
end

multi_line?() click to toggle source

def multi_line?: () -> bool

# File prism/node.rb, line 10700
def multi_line?
  flags.anybits?(RegularExpressionFlags::MULTI_LINE)
end

once?() click to toggle source

def once?: () -> bool

# File prism/node.rb, line 10705
def once?
  flags.anybits?(RegularExpressionFlags::ONCE)
end

opening() click to toggle source

def opening: () -> String

# File prism/node.rb, line 10745
def opening
  opening_loc.slice
end

opening_loc() click to toggle source

attr_reader opening_loc: Location

# File prism/node.rb, line 10673
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 10773
def type
  :interpolated_match_last_line_node
end

utf_8?() click to toggle source

def utf_8?: () -> bool

# File prism/node.rb, line 10725
def utf_8?
  flags.anybits?(RegularExpressionFlags::UTF_8)
end

windows_31j?() click to toggle source

def windows_31j?: () -> bool

# File prism/node.rb, line 10720
def windows_31j?
  flags.anybits?(RegularExpressionFlags::WINDOWS_31J)
end