SyntaxSuggest::LeftRightLexCount#count_lex

# File tmp/rubies/ruby-3.3.0/lib/syntax_suggest/left_right_lex_count.rb, line 58
def count_lex(lex)
  case lex.type
  when :on_tstring_content
    # ^^^
    # Means it's a string or a symbol `"{"` rather than being
    # part of a data structure (like a hash) `{ a: b }`
    # ignore it.
  when :on_words_beg, :on_symbos_beg, :on_qwords_beg,
       :on_qsymbols_beg, :on_regexp_beg, :on_tstring_beg
    # ^^^
    # Handle shorthand syntaxes like `%Q{ i am a string }`
    #
    # The start token will be the full thing `%Q{` but we
    # need to count it as if it's a `{`. Any token
    # can be used
    char = lex.token[-1]
    @count_for_char[char] += 1 if @count_for_char.key?(char)
  when :on_embexpr_beg
    # ^^^
    # Embedded string expressions like `"#{foo} <-embed"`
    # are parsed with chars:
    #
    # `#{` as :on_embexpr_beg
    #  `}` as :on_embexpr_end
    #
    # We cannot ignore both :on_emb_expr_beg and :on_embexpr_end
    # because sometimes the lexer thinks something is an embed
    # string end, when it is not like `lol = }` (no clue why).
    #
    # When we see `#{` count it as a `{` or we will
    # have a mis-match count.
    #
    case lex.token
    when "\#{"
      @count_for_char["{"] += 1
    end
  else
    @end_count += 1 if lex.is_end?
    @kw_count += 1 if lex.is_kw?
    @count_for_char[lex.token] += 1 if @count_for_char.key?(lex.token)
  end
end