def tabs
line = self
@tabs ||= compiler.instance_eval do
break 0 if line.text.empty? || !(whitespace = line.full[/^\s+/])
if @indentation.nil?
@indentation = whitespace
if @indentation.include?(?\s) && @indentation.include?(?\t)
raise SyntaxError.new(Error.message(:cant_use_tabs_and_spaces), line.index)
end
@flat_spaces = @indentation * (@template_tabs+1) if flat?
break 1
end
tabs = whitespace.length / @indentation.length
break tabs if whitespace == @indentation * tabs
break @template_tabs + 1 if flat? && whitespace =~ /^#{@flat_spaces}/
message = Error.message(:inconsistent_indentation,
Haml::Util.human_indentation(whitespace),
Haml::Util.human_indentation(@indentation)
)
raise SyntaxError.new(message, line.index)
end
end