Re: Visual C++ (non-standard C++)

From:
"Alf P. Steinbach" <alfps@start.no>
Newsgroups:
microsoft.public.vc.mfc,microsoft.public.vc.language
Date:
Wed, 09 Apr 2008 19:44:36 +0200
Message-ID:
<K9WdnWaZmPMMnWDanZ2dnUVZ_tijnZ2d@comnet>
* worlman385@yahoo.com:

Does visual C++ uses a lot of non-standard C/ C++ syntax?


A language doesn't use, users use.

Visual C++ has some language extensions.

for example -

1) near / far seem not standard C++ / standard C
typedef DWORD near *PDWORD;
typedef DWORD far *LPDWORD;


I don't think modern versions of Visual C++ support "near" and "far", but
perhaps they do for backward compatibility.

2) I heard the following is compiler specific
_STD_BEGIN
_STD_END


No, those are macros that presumably belong to the implementation of the
standard library. They're specific to that library implementation. You should
not use them (that's indicated by the leading underscore in the names).

3) I heard the following is compiler specific
__PURE_APPDOMAIN_GLOBAL extern _CRTDATA2 ostream cout;


The macros may or may not expand to something that's compiler specific.

Anyway, it's not a concern for you.

The library implementation implements the library (mostly) as specified by the
standard, and it's the standard you should relate to, not any particular
implementation's internal code.

Cheers, & hth.,

- Alf

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