class Prism::InterpolatedMatchLastLineNode - Documentation for Ruby 3.3

# 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

closing_loc[R]

attr_reader `closing_loc`: `Location`

opening_loc[R]

attr_reader `opening_loc`: `Location`

parts[R]

attr_reader parts: Array

### Public Class Methods

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

def initialize: (flags: `Integer`, `opening_loc`: `Location`, parts: Array, `closing_loc`: `Location`, location: `Location`) -> void

    # File lib/prism/node.rb, line 9728
    def initialize(flags, opening_loc, parts, closing_loc, location)
      @flags = flags
      @opening_loc = opening_loc
      @parts = parts
      @closing_loc = closing_loc
      @location = location
    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 lib/prism/node.rb, line 9880
    def self.type
      :interpolated_match_last_line_node
    end

### Public Instance Methods

accept(visitor) click to toggle source

def accept: (visitor: `Visitor`) -> void

    # File lib/prism/node.rb, line 9737
    def accept(visitor)
      visitor.visit_interpolated_match_last_line_node(self)
    end

ascii_8bit?() click to toggle source

def ascii_8bit?: () -> bool

    # File lib/prism/node.rb, line 9806
    def ascii_8bit?
      flags.anybits?(RegularExpressionFlags::ASCII_8BIT)
    end

child_nodes() click to toggle source

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

    # File lib/prism/node.rb, line 9747
    def child_nodes
      [*parts]
    end

Also aliased as: deconstruct
closing() click to toggle source

def closing: () -> `String`

    # File lib/prism/node.rb, line 9841
    def closing
      closing_loc.slice
    end

comment_targets() click to toggle source

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

    # File lib/prism/node.rb, line 9757
    def comment_targets
      [opening_loc, *parts, closing_loc]
    end

compact_child_nodes() click to toggle source

def `compact_child_nodes`: () -> Array

    # File lib/prism/node.rb, line 9752
    def compact_child_nodes
      [*parts]
    end

copy(**params) click to toggle source

def copy: (**params) -> `InterpolatedMatchLastLineNode`

    # File lib/prism/node.rb, line 9762
    def copy(**params)
      InterpolatedMatchLastLineNode.new(
        params.fetch(:flags) { flags },
        params.fetch(:opening_loc) { opening_loc },
        params.fetch(:parts) { parts },
        params.fetch(:closing_loc) { closing_loc },
        params.fetch(:location) { location },
      )
    end

deconstruct()

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

Alias for: child_nodes
deconstruct_keys(keys) click to toggle source

def `deconstruct_keys`: (keys: Array) -> Hash[Symbol, nil | `Node` | Array | `String` | `Token` | Array | Location]

    # File lib/prism/node.rb, line 9776
    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 lib/prism/node.rb, line 9801
    def euc_jp?
      flags.anybits?(RegularExpressionFlags::EUC_JP)
    end

extended?() click to toggle source

def extended?: () -> bool

    # File lib/prism/node.rb, line 9786
    def extended?
      flags.anybits?(RegularExpressionFlags::EXTENDED)
    end

forced_binary_encoding?() click to toggle source

def forced_binary_encoding?: () -> bool

    # File lib/prism/node.rb, line 9826
    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 lib/prism/node.rb, line 9831
    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 lib/prism/node.rb, line 9821
    def forced_utf8_encoding?
      flags.anybits?(RegularExpressionFlags::FORCED_UTF8_ENCODING)
    end

ignore_case?() click to toggle source

def ignore_case?: () -> bool

    # File lib/prism/node.rb, line 9781
    def ignore_case?
      flags.anybits?(RegularExpressionFlags::IGNORE_CASE)
    end

inspect(inspector = NodeInspector.new) click to toggle source

def inspect(inspector: NodeInspector) -> `String`

    # File lib/prism/node.rb, line 9846
    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 << "├── parts: #{inspector.list("#{inspector.prefix}│   ", parts)}"
      inspector << "└── closing_loc: #{inspector.location(closing_loc)}\n"
      inspector.to_str
    end

multi_line?() click to toggle source

def multi_line?: () -> bool

    # File lib/prism/node.rb, line 9791
    def multi_line?
      flags.anybits?(RegularExpressionFlags::MULTI_LINE)
    end

once?() click to toggle source

def once?: () -> bool

    # File lib/prism/node.rb, line 9796
    def once?
      flags.anybits?(RegularExpressionFlags::ONCE)
    end

opening() click to toggle source

def opening: () -> `String`

    # File lib/prism/node.rb, line 9836
    def opening
      opening_loc.slice
    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 lib/prism/node.rb, line 9870
    def type
      :interpolated_match_last_line_node
    end

utf_8?() click to toggle source

def utf_8?: () -> bool

    # File lib/prism/node.rb, line 9816
    def utf_8?
      flags.anybits?(RegularExpressionFlags::UTF_8)
    end

windows_31j?() click to toggle source

def windows_31j?: () -> bool

    # File lib/prism/node.rb, line 9811
    def windows_31j?
      flags.anybits?(RegularExpressionFlags::WINDOWS_31J)
    end