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Filename : kconv.rbs
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# <!-- rdoc-file=ext/nkf/lib/kconv.rb -->
# Kanji Converter for Ruby.
#
module Kconv
  # <!-- rdoc-file=ext/nkf/lib/kconv.rb -->
  # ASCII
  #
  ASCII: Encoding

  # <!-- rdoc-file=ext/nkf/lib/kconv.rb -->
  # Auto-Detect
  #
  AUTO: nil

  # <!-- rdoc-file=ext/nkf/lib/kconv.rb -->
  # BINARY
  #
  BINARY: Encoding

  # <!-- rdoc-file=ext/nkf/lib/kconv.rb -->
  # EUC-JP
  #
  EUC: Encoding

  # <!-- rdoc-file=ext/nkf/lib/kconv.rb -->
  # ISO-2022-JP
  #
  JIS: Encoding

  # <!-- rdoc-file=ext/nkf/lib/kconv.rb -->
  # NOCONV
  #
  NOCONV: nil

  # <!-- rdoc-file=ext/nkf/lib/kconv.rb -->
  # Shift_JIS
  #
  SJIS: Encoding

  # <!-- rdoc-file=ext/nkf/lib/kconv.rb -->
  # UNKNOWN
  #
  UNKNOWN: nil

  # <!-- rdoc-file=ext/nkf/lib/kconv.rb -->
  # UTF-16
  #
  UTF16: Encoding

  # <!-- rdoc-file=ext/nkf/lib/kconv.rb -->
  # UTF-32
  #
  UTF32: Encoding

  # <!-- rdoc-file=ext/nkf/lib/kconv.rb -->
  # UTF-8
  #
  UTF8: Encoding

  # <!--
  #   rdoc-file=ext/nkf/lib/kconv.rb
  #   - Kconv.guess(str)   => encoding
  # -->
  # Guess input encoding by NKF.guess
  #
  def self.guess: (String str) -> Encoding

  # <!--
  #   rdoc-file=ext/nkf/lib/kconv.rb
  #   - Kconv.iseuc(str)   => true or false
  # -->
  # Returns whether input encoding is EUC-JP or not.
  #
  # **Note** don't expect this return value is MatchData.
  #
  def self.iseuc: (String str) -> bool

  # <!--
  #   rdoc-file=ext/nkf/lib/kconv.rb
  #   - Kconv.isjis(str)   => true or false
  # -->
  # Returns whether input encoding is ISO-2022-JP or not.
  #
  def self.isjis: (String str) -> bool

  # <!--
  #   rdoc-file=ext/nkf/lib/kconv.rb
  #   - Kconv.issjis(str)   => true or false
  # -->
  # Returns whether input encoding is Shift_JIS or not.
  #
  def self.issjis: (String str) -> bool

  # <!--
  #   rdoc-file=ext/nkf/lib/kconv.rb
  #   - Kconv.isutf8(str)   => true or false
  # -->
  # Returns whether input encoding is UTF-8 or not.
  #
  def self.isutf8: (String str) -> bool

  # <!--
  #   rdoc-file=ext/nkf/lib/kconv.rb
  #   - Kconv.kconv(str, to_enc, from_enc=nil)
  # -->
  # Convert `str` to `to_enc`. `to_enc` and `from_enc` are given as constants of
  # Kconv or Encoding objects.
  #
  def self.kconv: (String str, Encoding? out_code, ?Encoding? in_code) -> String

  # <!--
  #   rdoc-file=ext/nkf/lib/kconv.rb
  #   - Kconv.toeuc(str)   => string
  # -->
  # Convert `str` to EUC-JP
  #
  def self.toeuc: (String str) -> String

  # <!--
  #   rdoc-file=ext/nkf/lib/kconv.rb
  #   - Kconv.tojis(str)   => string
  # -->
  # Convert `str` to ISO-2022-JP
  #
  def self.tojis: (String str) -> String

  # <!--
  #   rdoc-file=ext/nkf/lib/kconv.rb
  #   - Kconv.tolocale   => string
  # -->
  # Convert `self` to locale encoding
  #
  def self.tolocale: (String str) -> String

  # <!--
  #   rdoc-file=ext/nkf/lib/kconv.rb
  #   - Kconv.tosjis(str)   => string
  # -->
  # Convert `str` to Shift_JIS
  #
  def self.tosjis: (String str) -> String

  # <!--
  #   rdoc-file=ext/nkf/lib/kconv.rb
  #   - Kconv.toutf16(str)   => string
  # -->
  # Convert `str` to UTF-16
  #
  def self.toutf16: (String str) -> String

  # <!--
  #   rdoc-file=ext/nkf/lib/kconv.rb
  #   - Kconv.toutf32(str)   => string
  # -->
  # Convert `str` to UTF-32
  #
  def self.toutf32: (String str) -> String

  # <!--
  #   rdoc-file=ext/nkf/lib/kconv.rb
  #   - Kconv.toutf8(str)   => string
  # -->
  # Convert `str` to UTF-8
  #
  def self.toutf8: (String str) -> String
end