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Thu, 11 Feb 2016 09:20:03 -0500
Date: Thu, 11 Feb 2016 15:20:00 +0100
From: Marek Polacek
To: GCC Patches
Cc: Jonathan Wakely
Subject: [wwwdocs] Add a note about in-class initialization of static data
member
Message-ID: <20160211142000.GB3163@redhat.com>
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Does this look ok?
Marek
Index: porting_to.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-6/porting_to.html,v
retrieving revision 1.9
diff -u -r1.9 porting_to.html
--- porting_to.html 10 Feb 2016 17:21:54 -0000 1.9
+++ porting_to.html 11 Feb 2016 14:18:59 -0000
@@ -269,6 +269,25 @@
to port the code to use C++11's std::unique_ptr
instead.
+'constexpr' needed for in-class initialization of static data member
+
+
+Since C++11, the constexpr
keyword is needed when initializing
+a non-integral static data member in a class. Thus the following program is
+accepted in C++03 (albeit with a -Wpedantic warning):
+
+
+
+struct X {
+ const static double i = 10;
+};
+
+
+
+While in C++11, the program above is rejected with an error. The fix is to
+use constexpr
instead of const
.
+
+
-Wmisleading-indentation
A new warning -Wmisleading-indentation
was added