libphobos/libdruntime/rt/typeinfo/ti_ptr.d

   1 /**
   2  * TypeInfo support code.
   3  *
   4  * Copyright: Copyright Digital Mars 2004 - 2009.
   5  * License:   $(WEB www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
   6  * Authors:   Walter Bright
   7  */
   8
   9 /*          Copyright Digital Mars 2004 - 2009.
  10  * Distributed under the Boost Software License, Version 1.0.
  11  *    (See accompanying file LICENSE or copy at
  12  *          http://www.boost.org/LICENSE_1_0.txt)
  13  */
  14 module rt.typeinfo.ti_ptr;
  15
  16 // internal typeinfo for any pointer type
  17 // please keep in sync with TypeInfo_Pointer
  18
  19 class TypeInfo_P : TypeInfo
  20 {
  21     @trusted:
  22     const:
  23     pure:
  24     nothrow:
  25
  26     override size_t getHash(in void* p)
  27     {
  28         return cast(size_t)*cast(void**)p;
  29     }
  30
  31     override bool equals(in void* p1, in void* p2)
  32     {
  33         return *cast(void**)p1 == *cast(void**)p2;
  34     }
  35
  36     override int compare(in void* p1, in void* p2)
  37     {
  38         if (*cast(void**)p1 < *cast(void**)p2)
  39             return -1;
  40         else if (*cast(void**)p1 > *cast(void**)p2)
  41             return 1;
  42         else
  43             return 0;
  44     }
  45
  46     override @property size_t tsize() nothrow pure
  47     {
  48         return (void*).sizeof;
  49     }
  50
  51     override const(void)[] initializer() const @trusted
  52     {
  53         return (cast(void *)null)[0 .. (void*).sizeof];
  54     }
  55
  56     override void swap(void *p1, void *p2)
  57     {
  58         void* tmp = *cast(void**)p1;
  59         *cast(void**)p1 = *cast(void**)p2;
  60         *cast(void**)p2 = tmp;
  61     }
  62
  63     override @property uint flags() nothrow pure const { return 1; }
  64 }