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 ^^^^^^
attr_reader opening_loc: Location
attr_reader content_loc: Location
attr_reader closing_loc: Location
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 11429
def initialize(flags, opening_loc, content_loc, closing_loc, unescaped, location)
@flags = flags
@opening_loc = opening_loc
@content_loc = content_loc
@closing_loc = closing_loc
@unescaped = unescaped
@location = location
end
def initialize: (flags: Integer, opening_loc: Location, content_loc: Location, closing_loc: Location, unescaped: String, location: Location) -> void
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 11584
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-3.3.0/lib/prism/node.rb, line 11439
def accept(visitor)
visitor.visit_match_last_line_node(self)
end
def accept: (visitor: Visitor) -> void
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 11504
def ascii_8bit?
flags.anybits?(RegularExpressionFlags::ASCII_8BIT)
end
def ascii_8bit?: () -> bool
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 11444
def child_nodes
[]
end
def child_nodes: () -> Array[nil | Node]
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 11544
def closing
closing_loc.slice
end
def closing: () -> String
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 11454
def comment_targets
[opening_loc, content_loc, closing_loc]
end
def comment_targets: () -> Array[Node | Location]
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 11449
def compact_child_nodes
[]
end
def compact_child_nodes: () -> Array
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 11539
def content
content_loc.slice
end
def content: () -> String
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 11459
def copy(**params)
MatchLastLineNode.new(
params.fetch(:flags) { flags },
params.fetch(:opening_loc) { opening_loc },
params.fetch(:content_loc) { content_loc },
params.fetch(:closing_loc) { closing_loc },
params.fetch(:unescaped) { unescaped },
params.fetch(:location) { location },
)
end
def copy: (**params) -> MatchLastLineNode
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 11474
def deconstruct_keys(keys)
{ flags: flags, opening_loc: opening_loc, content_loc: content_loc, closing_loc: closing_loc, unescaped: unescaped, location: location }
end
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 11499
def euc_jp?
flags.anybits?(RegularExpressionFlags::EUC_JP)
end
def euc_jp?: () -> bool
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 11484
def extended?
flags.anybits?(RegularExpressionFlags::EXTENDED)
end
def extended?: () -> bool
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 11524
def forced_binary_encoding?
flags.anybits?(RegularExpressionFlags::FORCED_BINARY_ENCODING)
end
def forced_binary_encoding?: () -> bool
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 11529
def forced_us_ascii_encoding?
flags.anybits?(RegularExpressionFlags::FORCED_US_ASCII_ENCODING)
end
def forced_us_ascii_encoding?: () -> bool
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 11519
def forced_utf8_encoding?
flags.anybits?(RegularExpressionFlags::FORCED_UTF8_ENCODING)
end
def forced_utf8_encoding?: () -> bool
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 11479
def ignore_case?
flags.anybits?(RegularExpressionFlags::IGNORE_CASE)
end
def ignore_case?: () -> bool
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 11549
def inspect(inspector = NodeInspector.new)
inspector << inspector.header(self)
flags = [("ignore_case" if ignore_case?), ("extended" if extended?), ("multi_line" if multi_line?), ("once" if once?), ("euc_jp" if euc_jp?), ("ascii_8bit" if ascii_8bit?), ("windows_31j" if windows_31j?), ("utf_8" if utf_8?), ("forced_utf8_encoding" if forced_utf8_encoding?), ("forced_binary_encoding" if forced_binary_encoding?), ("forced_us_ascii_encoding" if forced_us_ascii_encoding?)].compact
inspector << "├── flags: #{flags.empty? ? "∅" : flags.join(", ")}\n"
inspector << "├── opening_loc: #{inspector.location(opening_loc)}\n"
inspector << "├── content_loc: #{inspector.location(content_loc)}\n"
inspector << "├── closing_loc: #{inspector.location(closing_loc)}\n"
inspector << "└── unescaped: #{unescaped.inspect}\n"
inspector.to_str
end
def inspect(inspector: NodeInspector) -> String
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 11489
def multi_line?
flags.anybits?(RegularExpressionFlags::MULTI_LINE)
end
def multi_line?: () -> bool
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 11494
def once?
flags.anybits?(RegularExpressionFlags::ONCE)
end
def once?: () -> bool
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 11534
def opening
opening_loc.slice
end
def opening: () -> String
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 11574
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-3.3.0/lib/prism/node.rb, line 11514
def utf_8?
flags.anybits?(RegularExpressionFlags::UTF_8)
end
def utf_8?: () -> bool
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 11509
def windows_31j?
flags.anybits?(RegularExpressionFlags::WINDOWS_31J)
end
def windows_31j?: () -> bool