LibreOffice Module sw (master)  1
needed_cast.hxx
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19 
20 #ifndef INCLUDED_SW_SOURCE_FILTER_WW8_NEEDED_CAST_HXX
21 #define INCLUDED_SW_SOURCE_FILTER_WW8_NEEDED_CAST_HXX
22 
23 #include <osl/diagnose.h>
24 
25 namespace ww
26 {
27  template<typename Ret, typename Param> Ret checking_cast(Param in, Ret)
28  {
29  return static_cast<Ret>(in);
30  }
31 
32  template<typename Ret> Ret checking_cast(Ret in, Ret)
33  {
34  OSL_ENSURE( false, "UnnecessaryCast" );
35  return in;
36  }
37 
38  /*
39  needed_cast is the same as static_cast except that there will be a compile
40  time assert when NDEBUG is not defined and the in and out types are the
41  same. i.e. needed_cast catches unnecessary casts
42  */
43  template<typename Ret, typename Param> Ret needed_cast(Param in)
44  {
45  /*
46  Massage a single argument and a ret value into two arguments to allow
47  a determination if the dest type is the same as the source type
48  */
49  return checking_cast(in, Ret());
50  }
51 }
52 #endif
53 
54 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
Definition: wwstyles.hxx:25
Ret checking_cast(Param in, Ret)
Definition: needed_cast.hxx:27
Ret needed_cast(Param in)
Definition: needed_cast.hxx:43