SL>Eric Weigel le escribe a Doug Glenn:

SL>EW>  Compilers with type checking eliminate the need for
SL>EW> encoding variable types in the name.

SL>If I see BOBclient, I can immediately tell that it is a variable of
SL>type BOB that has something to do with a client. How can I otherwise?
SL>You can be clever and point out that some IDE's will tell you, for
SL>example, QuickBasic 4.5. (Was _that_ ever a long time ago! Too bad it
SL>was discontinued.) However, a piece of paper hasn't been capable of
SL>doing much since it was in the tree.

What is a BOB?

I don't have much problem with prefixing pointer names with "p", and
less with prefixing handles with "h".  Same goes for typedefs, where for
instance PVOID is clear (but void* is clearer).  HWND, HFILE, HAPP are
not only clear, but to my mind sensible.

The other problem with "Hungarian" notation is what happens when you
have to change the type of an existing variable or (really important!)
structure member. The meaning and usage may be identical, but now you
have to edit perhaps hundreds of lines of code.

The natural response will be to forget about renaming the thing, but
then you end up with a notation that does not describe reality.  On the
other hand, you may decide that keeping the notation current is worth
it, and rename everything.  But, you'll forget at least one.

OS/2 2.x header files are a fine example.  Many things changed from
USHORT to ULONG in the transition from 1.x  Most of them changed
their names, some didn't.

File PMDDI.H:
   typedef struct _NOTIFYTRANSFORMDATA   /* ntd */
   {
      ULONG  usType;               
<<<<<<<<<<<<<<<<<
      XFORM  xform;
   } NOTIFYTRANSFORMDATA;
   typedef NOTIFYTRANSFORMDATA *PNOTIFYTRANSFORMDATA;

File PMSTDDLG.H:
   typedef struct _SEARCHSTRING     /* srchstr */
   {
      ULONG  cb;
      PSZ    pszSearch;
      ULONG  fsPrefix;
      ULONG  fsCaseSensitive;
      ULONG  usView;               
<<<<<<<<<<<<<<<<<
   } SEARCHSTRING;
   typedef SEARCHSTRING *PSEARCHSTRING;

File pmwin.h:
   typedef struct _WNDPARAMS    /* wprm */
   {
      ULONG   fsStatus;            
<<<<<<<<<<<<<<<<<
      ULONG   cchText;
      PSZ     pszText;
      ULONG   cbPresParams;
      PVOID   pPresParams;
      ULONG   cbCtlData;
      PVOID   pCtlData;
   } WNDPARAMS;
   typedef WNDPARAMS *PWNDPARAMS;

   typedef struct _CONVCONTEXT    /* cctxt */
   {
      ULONG  cb;          /* sizeof(CONVCONTEXT) */
      ULONG fsContext;             
<<<<<<<<<<<<<<<<<
      ULONG idCountry;
      ULONG usCodepage;            
<<<<<<<<<<<<<<<<<
      ULONG usLangID;              
<<<<<<<<<<<<<<<<<
      ULONG usSubLangID;           
<<<<<<<<<<<<<<<<<
   } CONVCONTEXT;
   typedef CONVCONTEXT *PCONVCONTEXT;

___
 X SLMR 2.1a X 

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