Method eval_number

3rdparty/pugixml/pugixml.cpp:10666–10802

		}

		double eval_number(const xpath_context& c, const xpath_stack& stack)
		{
			switch (_type)
			{
			case ast_op_add:
				return _left->eval_number(c, stack) + _right->eval_number(c, stack);

			case ast_op_subtract:
				return _left->eval_number(c, stack) - _right->eval_number(c, stack);

			case ast_op_multiply:
				return _left->eval_number(c, stack) * _right->eval_number(c, stack);

			case ast_op_divide:
				return _left->eval_number(c, stack) / _right->eval_number(c, stack);

			case ast_op_mod:
				return fmod(_left->eval_number(c, stack), _right->eval_number(c, stack));

			case ast_op_negate:
				return -_left->eval_number(c, stack);

			case ast_number_constant:
				return _data.number;

			case ast_func_last:
				return static_cast<double>(c.size);

			case ast_func_position:
				return static_cast<double>(c.position);

			case ast_func_count:
			{
				xpath_allocator_capture cr(stack.result);

				return static_cast<double>(_left->eval_node_set(c, stack, nodeset_eval_all).size());
			}

			case ast_func_string_length_0:
			{
				xpath_allocator_capture cr(stack.result);

				return static_cast<double>(string_value(c.n, stack.result).length());
			}

			case ast_func_string_length_1:
			{
				xpath_allocator_capture cr(stack.result);

				return static_cast<double>(_left->eval_string(c, stack).length());
			}

			case ast_func_number_0:
			{
				xpath_allocator_capture cr(stack.result);

				return convert_string_to_number(string_value(c.n, stack.result).c_str());
			}