Module: Steep::AST::Ignore

Defined in:
lib/steep/ast/ignore.rb

Defined Under Namespace

Classes: BufferScanner, IgnoreEnd, IgnoreLine, IgnoreStart

Class Method Summary collapse

Class Method Details

.parse(comment, buffer) ⇒ Object 



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# File 'lib/steep/ast/ignore.rb', line 93

def self.parse(comment, buffer)
  return unless comment.inline?

  begin_pos = buffer.loc_to_pos([comment.loc.line, comment.loc.column])
  end_pos = buffer.loc_to_pos([comment.loc.last_line, comment.loc.last_column])
  comment_location = RBS::Location.new(buffer, begin_pos, end_pos)
  scanner = BufferScanner.new(comment_location)

  scanner.scan(/#/)
  scanner.skip(/\s*/)

  case
  when loc = scanner.scan(/steep:ignore:start\b/)
    scanner.skip(/\s*/)
    return unless scanner.eos?

    IgnoreStart.new(comment, loc)
  when loc = scanner.scan(/steep:ignore:end\b/)
    scanner.skip(/\s*/)
    return unless scanner.eos?

    IgnoreEnd.new(comment, loc)
  when keyword_loc = scanner.scan(/steep:ignore\b/)
    # @type var diagnostics: IgnoreLine::diagnostics
    diagnostics = []

    scanner.skip(/\s*/)

    while true
      name = scanner.scan(/[A-Z]\w*/) or break
      scanner.skip(/\s*/)
      comma = scanner.scan(/,/)
      scanner.skip(/\s*/)

      diagnostic = RBS::Location.new(buffer, name.start_pos, comma&.end_pos || name.end_pos) #: IgnoreLine::diagnostic
      diagnostic.add_required_child(:name, name.range)
      diagnostic.add_optional_child(:following_comma, comma&.range)
      diagnostics << diagnostic

      break unless comma
    end

    return unless scanner.eos?

    loc = RBS::Location.new(
      buffer,
      keyword_loc.start_pos,
      diagnostics.last&.end_pos || keyword_loc.end_pos
    )
    IgnoreLine.new(comment, diagnostics, loc)
  end
end