• a.c.edwards (7/7) May 27 2005 What is the proper way to convert this C macro to D?
• Jarrett Billingsley (20/25) May 27 2005 Nope, that's about right, though that particular string would only be us...
• Stewart Gordon (16/26) Jun 02 2005

a.c.edwards <a.c.edwards_member pathlink.com> writes:

What is the proper way to convert this C macro to D?

:  #define TEXTVIEW_CLASS _T("TextView32")

This is how I understand it, but don't know if it is correct:

:  const char[] TEXTVIEW_CLASS = "TextView32";

am I way off base here?

Thanks,
Andrew

"Jarrett Billingsley" <kb3ctd2 yahoo.com> writes:

"a.c.edwards" <a.c.edwards_member pathlink.com> wrote in message 
news:d773c7$1ga7$1 digitaldaemon.com...
 What is the proper way to convert this C macro to D?

 :  #define TEXTVIEW_CLASS _T("TextView32")

 This is how I understand it, but don't know if it is correct:

 :  const char[] TEXTVIEW_CLASS = "TextView32";

 am I way off base here?

Nope, that's about right, though that particular string would only be usable 
with the A versions of the API functions.

If you'd like to use the W versions, you'd have to use a const wchar[].

Or, you could have a version statement:

version(Unicode)
{
    const wchar[] TEXTVIEW_CLASS="TextView32";
}
else
{
    const char[] TEXTVIEW_CLASS="TextView32";
}

Which is essentially what the _T() macro does in C.

You could also use the version(Unicode) statement to make aliases for the W 
versions of the functions (like MessageBoxW to MessageBox), and in the else, 
alias the A versions.  That way, you can just put a -version=Unicode on the 
compiler commandline (or leave it out), and the correct set of functions and 
constants will be selected.  :) 

Stewart Gordon <smjg_1998 yahoo.com> writes:

Jarrett Billingsley wrote:
<snip>
 Or, you could have a version statement:
 
 version(Unicode)
 {
     const wchar[] TEXTVIEW_CLASS="TextView32";
 }
 else
 {
     const char[] TEXTVIEW_CLASS="TextView32";
 }

<snip>

Or have somewhere

     version(Unicode) {
         alias wchar TCHAR;
     } else {
         alias char TCHAR;
     }

then you can do simply

     const TCHAR[] TEXTVIEW_CLASS="TextView32";

a little less repetitive when you've got lots to declare.

Stewart.

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