# File lib/sass/less.rb, line 235
235:       def to_sass_tree
236:         if first.is_a?(Array)
237:           val = map {|e| _to_sass_tree(e)}.inject(nil) do |e, i|
238:             next i unless e
239:             Sass::Script::Operation.new(e, i, :comma)
240:           end
241:         else
242:           val = _to_sass_tree(self)
243:         end
244:         val.options = {}
245:         val
246:       end

     # File lib/sass/less.rb, line 271
271:       def _sass_split(arr)
272:         return arr[0].to_sass_tree, arr[1..-1] unless arr[0] == "("
273:         parens = 1
274:         i = arr[1..-1].each_with_index do |e, i|
275:           parens += 1 if e == "("
276:           parens -= 1 if e == ")"
277:           break i if parens == 0
278:         end
279: 
280:         return _to_sass_tree(arr[1...i+1]), arr[i+2..-1]
281:       end

     # File lib/sass/less.rb, line 251
251:       def _to_sass_tree(arr)
252:         return Sass::Script::UnaryOperation.new(_to_sass_tree(arr[1..-1]), :minus) if arr[0] == "-"
253:         _to_sass_tree2(*_sass_split(arr))
254:       end

     # File lib/sass/less.rb, line 256
256:       def _to_sass_tree2(first, rest)
257:         return first if rest.empty?
258:         if rest[0].is_a?(Operator)
259:           op = LESS_TO_SASS_OPERATORS[rest[0]]
260:           if op == :times || op == :div
261:             second, rest = _sass_split(rest[1..-1])
262:             return _to_sass_tree2(Sass::Script::Operation.new(first, second, op), rest)
263:           else
264:             return Sass::Script::Operation.new(first, _to_sass_tree(rest[1..-1]), op)
265:           end
266:         end
267: 
268:         Sass::Script::Operation.new(first, _to_sass_tree(rest), :concat)
269:       end