From: Paolo Carlini <paolo.carlini@oracle.com>
To: "gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>
Cc: Jason Merrill <jason@redhat.com>
Subject: [C++ docs patch] PR 56544
Date: Sat, 08 Jun 2013 08:57:00 -0000 [thread overview]
Message-ID: <51B2F1FD.2090600@oracle.com> (raw)
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Hi,
the bug reminds us to update the documentation about the value of
__cplusplus. I tentatively prepared the below, is it clear enough?
We could probably apply something to the branch too, without the
-std=c++1y bits, thus end simply like '; or @code{201103L}, per the 2011
C++ standard' or more verbosely say that with -std=c++1y too the value
is 201103L.
Thanks,
Paolo.
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Index: doc/cpp.texi
===================================================================
--- doc/cpp.texi (revision 199792)
+++ doc/cpp.texi (working copy)
@@ -1926,11 +1926,11 @@ facilities of the standard C library available.
This macro is defined when the C++ compiler is in use. You can use
@code{__cplusplus} to test whether a header is compiled by a C compiler
or a C++ compiler. This macro is similar to @code{__STDC_VERSION__}, in
-that it expands to a version number. A fully conforming implementation
-of the 1998 C++ standard will define this macro to @code{199711L}. The
-GNU C++ compiler is not yet fully conforming, so it uses @code{1}
-instead. It is hoped to complete the implementation of standard C++
-in the near future.
+that it expands to a version number. Depending on the language standard
+selected, the value of the macro is @code{199711L}, as mandated by the
+1998 C++ standard; @code{201103L}, per the 2011 C++ standard; an
+unspecified value strictly larger than @code{201103L} for the experimental
+languages enabled by @option{-std=c++1y} and @option{-std=gnu++1y}.
@item __OBJC__
This macro is defined, with value 1, when the Objective-C compiler is in
next reply other threads:[~2013-06-08 8:57 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-08 8:57 Paolo Carlini [this message]
2013-06-18 10:07 ` PING " Paolo Carlini
2013-06-19 9:04 ` Paolo Carlini
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