-----Messaggio Originale-----
Da: "Viktor Szakáts" <[email protected]>
A: "Harbour Project Main Developer List." <[email protected]>
Data invio: mercoledì 11 febbraio 2009 19.24
Oggetto: Re: [Harbour] Errors
> Not exactly. As I said, a HEADER doesn't necessarily have to exist as a
> file.
Sorry, but speaking of ANSI C, I'm not sure what you mean by that.
Ehm... I was thinking about something like
#include <iostream>
of C++. iostream doesn't have to be a file (and normally isn't).
Here's the standard:
http://std.dkuug.dk/JTC1/SC22/WG14/www/docs/n843.htm
--- [snippet from: "6.10.2 Source file inclusion" ]
Semantics
[#2] A preprocessing directive of the form
# include <h-char-sequence> new-line
searches a sequence of implementation-defined places for a
header identified uniquely by the specified sequence between
the < and > delimiters, and causes the replacement of that
directive by the entire contents of the header. How the
places are specified or the header identified is
implementation-defined.
[#3] A preprocessing directive of the form
# include "q-char-sequence" new-line
causes the replacement of that directive by the entire
contents of the source file identified by the specified
sequence between the " delimiters. The named source file is
searched for in an implementation-defined manner. If this
search is not supported, or if the search fails, the
directive is reprocessed as if it read
---
Difference between <> and "" is implementation dependent,
and it doesn't even mention "file". There we have it ;)
I don't agree. It explicitly mention the difference between a header (#2)
and a source file (#3). It seems to imply that a header is a more abstract
entity. I think that windows.h is a poor file. :-)
EMG
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