class RDoc::Parser::RipperStateLex

Constants

EXPR_ARG
EXPR_ARG_ANY
EXPR_BEG
EXPR_BEG_ANY
EXPR_CLASS
EXPR_CMDARG
EXPR_DOT
EXPR_END
EXPR_ENDARG
EXPR_ENDFN
EXPR_END_ANY
EXPR_FITEM
EXPR_FNAME
EXPR_LABEL
EXPR_LABELED
EXPR_MID
EXPR_NONE
EXPR_VALUE
RIPPER_HAS_LEX_STATE

TODO: Remove this constants after Ruby 2.4 EOL

Token

Public Class Methods

end?(token) click to toggle source
# File lib/rdoc/parser/ripper_state_lex.rb, line 586
def self.end?(token)
  (token[:state] & EXPR_END)
end
new(code) click to toggle source
# File lib/rdoc/parser/ripper_state_lex.rb, line 567
def initialize(code)
  @buf = []
  @heredoc_queue = []
  @inner_lex = InnerStateLex.new(code)
  @tokens = @inner_lex.parse([])
end
parse(code) click to toggle source
# File lib/rdoc/parser/ripper_state_lex.rb, line 574
def self.parse(code)
  lex = self.new(code)
  tokens = []
  begin
    while tk = lex.get_squashed_tk
      tokens.push tk
    end
  rescue StopIteration
  end
  tokens
end

Public Instance Methods

get_squashed_tk() click to toggle source
# File lib/rdoc/parser/ripper_state_lex.rb, line 317
def get_squashed_tk
  if @buf.empty?
    tk = @tokens.shift
  else
    tk = @buf.shift
  end
  return nil if tk.nil?
  case tk[:kind]
  when :on_symbeg then
    tk = get_symbol_tk(tk)
  when :on_tstring_beg then
    tk = get_string_tk(tk)
  when :on_backtick then
    if (tk[:state] & (EXPR_FNAME | EXPR_ENDFN)) != 0
      @inner_lex.lex_state = EXPR_ARG unless RIPPER_HAS_LEX_STATE
      tk[:kind] = :on_ident
      tk[:state] = Ripper::Lexer.const_defined?(:State) ? Ripper::Lexer::State.new(EXPR_ARG) : EXPR_ARG
    else
      tk = get_string_tk(tk)
    end
  when :on_regexp_beg then
    tk = get_regexp_tk(tk)
  when :on_embdoc_beg then
    tk = get_embdoc_tk(tk)
  when :on_heredoc_beg then
    @heredoc_queue << retrieve_heredoc_info(tk)
    @inner_lex.lex_state = EXPR_END unless RIPPER_HAS_LEX_STATE
  when :on_nl, :on_ignored_nl, :on_comment, :on_heredoc_end then
    if !@heredoc_queue.empty?
      get_heredoc_tk(*@heredoc_queue.shift)
    elsif tk[:text].nil? # :on_ignored_nl sometimes gives nil
      tk[:text] = ''
    end
  when :on_words_beg then
    tk = get_words_tk(tk)
  when :on_qwords_beg then
    tk = get_words_tk(tk)
  when :on_symbols_beg then
    tk = get_words_tk(tk)
  when :on_qsymbols_beg then
    tk = get_words_tk(tk)
  when :on_op then
    if '&.' == tk[:text]
      tk[:kind] = :on_period
    else
      tk = get_op_tk(tk)
    end
  end
  tk
end

Private Instance Methods

get_embdoc_tk(tk) click to toggle source
# File lib/rdoc/parser/ripper_state_lex.rb, line 460
        def get_embdoc_tk(tk)
  string = tk[:text]
  until :on_embdoc_end == (embdoc_tk = get_squashed_tk)[:kind] do
    string = string + embdoc_tk[:text]
  end
  string = string + embdoc_tk[:text]
  Token.new(tk.line_no, tk.char_no, :on_embdoc, string, embdoc_tk.state)
end
get_heredoc_tk(heredoc_name, indent) click to toggle source
# File lib/rdoc/parser/ripper_state_lex.rb, line 469
        def get_heredoc_tk(heredoc_name, indent)
  string = ''
  start_tk = nil
  prev_tk = nil
  until heredoc_end?(heredoc_name, indent, tk = @tokens.shift) do
    start_tk = tk unless start_tk
    if (prev_tk.nil? or "\n" == prev_tk[:text][-1]) and 0 != tk[:char_no]
      string = string + (' ' * tk[:char_no])
    end
    string = string + tk[:text]
    prev_tk = tk
  end
  start_tk = tk unless start_tk
  prev_tk = tk unless prev_tk
  @buf.unshift tk # closing heredoc
  heredoc_tk = Token.new(start_tk.line_no, start_tk.char_no, :on_heredoc, string, prev_tk.state)
  @buf.unshift heredoc_tk
end
get_op_tk(tk) click to toggle source
# File lib/rdoc/parser/ripper_state_lex.rb, line 543
        def get_op_tk(tk)
  redefinable_operators = %w[! != !~ % & * ** + +@ - -@ / < << <= <=> == === =~ > >= >> [] []= ^ ` | ~]
  if redefinable_operators.include?(tk[:text]) and tk[:state] == EXPR_ARG then
    @inner_lex.lex_state = EXPR_ARG unless RIPPER_HAS_LEX_STATE
    tk[:state] = Ripper::Lexer.const_defined?(:State) ? Ripper::Lexer::State.new(EXPR_ARG) : EXPR_ARG
    tk[:kind] = :on_ident
  elsif tk[:text] =~ /^[-+]$/ then
    tk_ahead = get_squashed_tk
    case tk_ahead[:kind]
    when :on_int, :on_float, :on_rational, :on_imaginary then
      tk[:text] += tk_ahead[:text]
      tk[:kind] = tk_ahead[:kind]
      tk[:state] = tk_ahead[:state]
    when :on_heredoc_beg, :on_tstring, :on_dstring # frozen/non-frozen string literal
      tk[:text] += tk_ahead[:text]
      tk[:kind] = tk_ahead[:kind]
      tk[:state] = tk_ahead[:state]
    else
      @buf.unshift tk_ahead
    end
  end
  tk
end
get_regexp_tk(tk) click to toggle source
# File lib/rdoc/parser/ripper_state_lex.rb, line 442
        def get_regexp_tk(tk)
  string = tk[:text]
  state = nil
  loop do
    inner_str_tk = get_squashed_tk
    if inner_str_tk.nil?
      break
    elsif :on_regexp_end == inner_str_tk[:kind]
      string = string + inner_str_tk[:text]
      state = inner_str_tk[:state]
      break
    else
      string = string + inner_str_tk[:text]
    end
  end
  Token.new(tk.line_no, tk.char_no, :on_regexp, string, state)
end
get_string_tk(tk) click to toggle source
# File lib/rdoc/parser/ripper_state_lex.rb, line 415
        def get_string_tk(tk)
  string = tk[:text]
  state = nil
  kind = :on_tstring
  loop do
    inner_str_tk = get_squashed_tk
    if inner_str_tk.nil?
      break
    elsif :on_tstring_end == inner_str_tk[:kind]
      string = string + inner_str_tk[:text]
      state = inner_str_tk[:state]
      break
    elsif :on_label_end == inner_str_tk[:kind]
      string = string + inner_str_tk[:text]
      state = inner_str_tk[:state]
      kind = :on_symbol
      break
    else
      string = string + inner_str_tk[:text]
      if :on_embexpr_beg == inner_str_tk[:kind] then
        kind = :on_dstring if :on_tstring == kind
      end
    end
  end
  Token.new(tk.line_no, tk.char_no, kind, string, state)
end
get_symbol_tk(tk) click to toggle source
# File lib/rdoc/parser/ripper_state_lex.rb, line 368
        def get_symbol_tk(tk)
  is_symbol = true
  symbol_tk = Token.new(tk.line_no, tk.char_no, :on_symbol)
  if ":'" == tk[:text] or ':"' == tk[:text]
    tk1 = get_string_tk(tk)
    symbol_tk[:text] = tk1[:text]
    symbol_tk[:state] = tk1[:state]
  else
    case (tk1 = get_squashed_tk)[:kind]
    when :on_ident
      symbol_tk[:text] = ":#{tk1[:text]}"
      symbol_tk[:state] = tk1[:state]
    when :on_tstring_content
      symbol_tk[:text] = ":#{tk1[:text]}"
      symbol_tk[:state] = get_squashed_tk[:state] # skip :on_tstring_end
    when :on_tstring_end
      symbol_tk[:text] = ":#{tk1[:text]}"
      symbol_tk[:state] = tk1[:state]
    when :on_op
      symbol_tk[:text] = ":#{tk1[:text]}"
      symbol_tk[:state] = tk1[:state]
    when :on_ivar
      symbol_tk[:text] = ":#{tk1[:text]}"
      symbol_tk[:state] = tk1[:state]
    when :on_cvar
      symbol_tk[:text] = ":#{tk1[:text]}"
      symbol_tk[:state] = tk1[:state]
    when :on_gvar
      symbol_tk[:text] = ":#{tk1[:text]}"
      symbol_tk[:state] = tk1[:state]
    when :on_const
      symbol_tk[:text] = ":#{tk1[:text]}"
      symbol_tk[:state] = tk1[:state]
    when :on_kw
      symbol_tk[:text] = ":#{tk1[:text]}"
      symbol_tk[:state] = tk1[:state]
    else
      is_symbol = false
      tk = tk1
    end
  end
  if is_symbol
    tk = symbol_tk
  end
  tk
end
get_words_tk(tk) click to toggle source
# File lib/rdoc/parser/ripper_state_lex.rb, line 505
        def get_words_tk(tk)
  string = ''
  start_token = tk[:text]
  start_quote = tk[:text].rstrip[-1]
  line_no = tk[:line_no]
  char_no = tk[:char_no]
  state = tk[:state]
  end_quote =
    case start_quote
    when ?( then ?)
    when ?[ then ?]
    when ?{ then ?}
    when ?< then ?>
    else start_quote
    end
  end_token = nil
  loop do
    tk = get_squashed_tk
    if tk.nil?
      end_token = end_quote
      break
    elsif :on_tstring_content == tk[:kind] then
      string += tk[:text]
    elsif :on_words_sep == tk[:kind] or :on_tstring_end == tk[:kind] then
      if end_quote == tk[:text].strip then
        end_token = tk[:text]
        break
      else
        string += tk[:text]
      end
    else
      string += tk[:text]
    end
  end
  text = "#{start_token}#{string}#{end_token}"
  Token.new(line_no, char_no, :on_dstring, text, state)
end
heredoc_end?(name, indent, tk) click to toggle source
# File lib/rdoc/parser/ripper_state_lex.rb, line 494
        def heredoc_end?(name, indent, tk)
  result = false
  if :on_heredoc_end == tk[:kind] then
    tk_name = (indent ? tk[:text].gsub(/^ *(.+)\n?$/, '\1') : tk[:text].gsub(/\n\z/, ''))
    if name == tk_name
      result = true
    end
  end
  result
end
retrieve_heredoc_info(tk) click to toggle source
# File lib/rdoc/parser/ripper_state_lex.rb, line 488
        def retrieve_heredoc_info(tk)
  name = tk[:text].gsub(/\A<<[-~]?(['"`]?)(.+)\1\z/, '\2')
  indent = tk[:text] =~ /\A<<[-~]/
  [name, indent]
end