hphp/runtime/vm/iter-args-flags.h

   1 /*
   2    +----------------------------------------------------------------------+
   3    | HipHop for PHP                                                       |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 2010-present Facebook, Inc. (http://www.facebook.com)  |
   6    +----------------------------------------------------------------------+
   7    | This source file is subject to version 3.01 of the PHP license,      |
   8    | that is bundled with this package in the file LICENSE, and is        |
   9    | available through the world-wide-web at the following url:           |
  10    | http://www.php.net/license/3_01.txt                                  |
  11    | If you did not receive a copy of the PHP license and are unable to   |
  12    | obtain it through the world-wide-web, please send a note to          |
  13    | license@php.net so we can mail you a copy immediately.               |
  14    +----------------------------------------------------------------------+
  15 */
  16
  17 #pragma once
  18
  19 #include <stdint.h>
  20
  21 namespace HPHP {
  22
  23 enum class IterArgsFlags : uint8_t {
  24   None      = 0,
  25   // The base is stored in a local, and that local is unmodified in the loop.
  26   BaseConst = (1 << 0),
  27   // Indicates whether IterGetKeys migh be used during iteration. Forces
  28   // iterator to be index-based rather than elemptr-based for vectors.
  29   WithKeys  = (1 << 1),
  30 };
  31
  32 constexpr IterArgsFlags operator&(IterArgsFlags a, IterArgsFlags b) {
  33   return IterArgsFlags(static_cast<uint8_t>(a) & static_cast<uint8_t>(b));
  34 }
  35
  36 constexpr IterArgsFlags operator|(IterArgsFlags a, IterArgsFlags b) {
  37   return IterArgsFlags(static_cast<uint8_t>(a) | static_cast<uint8_t>(b));
  38 }
  39
  40 constexpr IterArgsFlags operator~(IterArgsFlags a) {
  41   return IterArgsFlags(~static_cast<uint8_t>(a));
  42 }
  43
  44 constexpr bool has_flag(IterArgsFlags flags, IterArgsFlags flag) {
  45   return (flags & flag) != IterArgsFlags::None;
  46 }
  47
  48 }