SyntaxSuggest::CaptureCodeContext#capture_last_end_same_indent

capture_last_end_same_indent(block)

lib/syntax_suggest/capture_code_context.rb View on GitHub ↗

# File tmp/rubies/ruby-3.4.1/lib/syntax_suggest/capture_code_context.rb, line 161
def capture_last_end_same_indent(block)
  return if block.visible_lines.length != 1
  return unless block.visible_lines.first.is_kw?

  visible_line = block.visible_lines.first
  lines = @code_lines[visible_line.index..block.lines.last.index]

  # Find first end with same indent
  # (this would return line 4)
  #
  #   end             # 4
  matching_end = lines.detect { |line| line.indent == block.current_indent && line.is_end? }
  return unless matching_end

  @lines_to_output << matching_end

  # Work backwards from the end to
  # see if there are mis-matched
  # keyword/end pairs
  #
  # Return the first mis-matched keyword
  # this would find line 2
  #
  #     def bark      # 2
  #       puts "woof" # 3
  #   end             # 4
  end_count = 0
  kw_count = 0
  kw_line = @code_lines[visible_line.index..matching_end.index].reverse.detect do |line|
    end_count += 1 if line.is_end?
    kw_count += 1 if line.is_kw?

    !kw_count.zero? && kw_count >= end_count
  end
  return unless kw_line
  @lines_to_output << kw_line
end

When there is an invalid block with a keyword missing an end right before another end, it is unclear where which keyword is missing the end

Take this example:

class Dog       # 1
  def bark      # 2
    puts "woof" # 3
end             # 4

However due to github.com/ruby/syntax_suggest/issues/32 the problem line will be identified as:

> class Dog       # 1

Because lines 2, 3, and 4 are technically valid code and are expanded first, deemed valid, and hidden. We need to un-hide the matching end line 4. Also work backwards and if there’s a mis-matched keyword, show it too

See also #capture_first_kw_end_same_indent #sorted_lines #capture_falling_indent also in 4.0 · 3.3 · 3.2

‹ prev#capture_first_kw_end_same_indent next ›#sorted_lines