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 ^^^^^^
# File tmp/rubies/ruby-3.4.0-preview1/lib/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
def initialize: (Integer flags, Location opening_loc, Location content_loc, Location closing_loc, String unescaped, Location location) -> void
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 12728
def self.type
:match_last_line_node
end
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 tmp/rubies/ruby-3.4.0-preview1/lib/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
Implements case-equality for the node. This is effectively == but without comparing the value of locations. Locations are checked only for presence.
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 12569
def accept(visitor)
visitor.visit_match_last_line_node(self)
end
def accept: (Visitor visitor) -> void
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 12655
def ascii_8bit?
flags.anybits?(RegularExpressionFlags::ASCII_8BIT)
end
def ascii_8bit?: () -> bool
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 12574
def child_nodes
[]
end
def child_nodes: () -> Array[nil | Node]
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 12695
def closing
closing_loc.slice
end
def closing: () -> String
# File tmp/rubies/ruby-3.4.0-preview1/lib/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
attr_reader closing_loc: Location
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 12584
def comment_targets
[opening_loc, content_loc, closing_loc] #: Array[Prism::node | Location]
end
def comment_targets: () -> Array[Node | Location]
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 12579
def compact_child_nodes
[]
end
def compact_child_nodes: () -> Array
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 12690
def content
content_loc.slice
end
def content: () -> String
# File tmp/rubies/ruby-3.4.0-preview1/lib/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
attr_reader content_loc: Location
# File tmp/rubies/ruby-3.4.0-preview1/lib/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
# File tmp/rubies/ruby-3.4.0-preview1/lib/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
def deconstruct_keys: (Array keys) -> { flags: Integer, opening_loc: Location, content_loc: Location, closing_loc: Location, unescaped: String, location: Location }
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 12650
def euc_jp?
flags.anybits?(RegularExpressionFlags::EUC_JP)
end
def euc_jp?: () -> bool
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 12635
def extended?
flags.anybits?(RegularExpressionFlags::EXTENDED)
end
def extended?: () -> bool
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 12675
def forced_binary_encoding?
flags.anybits?(RegularExpressionFlags::FORCED_BINARY_ENCODING)
end
def forced_binary_encoding?: () -> bool
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 12680
def forced_us_ascii_encoding?
flags.anybits?(RegularExpressionFlags::FORCED_US_ASCII_ENCODING)
end
def forced_us_ascii_encoding?: () -> bool
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 12670
def forced_utf8_encoding?
flags.anybits?(RegularExpressionFlags::FORCED_UTF8_ENCODING)
end
def forced_utf8_encoding?: () -> bool
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 12630
def ignore_case?
flags.anybits?(RegularExpressionFlags::IGNORE_CASE)
end
def ignore_case?: () -> bool
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 12700
def inspect
InspectVisitor.compose(self)
end
def inspect -> String
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 12640
def multi_line?
flags.anybits?(RegularExpressionFlags::MULTI_LINE)
end
def multi_line?: () -> bool
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 12645
def once?
flags.anybits?(RegularExpressionFlags::ONCE)
end
def once?: () -> bool
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 12685
def opening
opening_loc.slice
end
def opening: () -> String
# File tmp/rubies/ruby-3.4.0-preview1/lib/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
attr_reader opening_loc: Location
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 12718
def type
:match_last_line_node
end
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 tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 12665
def utf_8?
flags.anybits?(RegularExpressionFlags::UTF_8)
end
def utf_8?: () -> bool
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 12660
def windows_31j?
flags.anybits?(RegularExpressionFlags::WINDOWS_31J)
end
def windows_31j?: () -> bool