[llvm] r230776 - Delete LLVM_DELETED_FUNCTION from coding standards
Reid Kleckner
reid at kleckner.net
Fri Feb 27 10:34:16 PST 2015
Author: rnk
Date: Fri Feb 27 12:34:16 2015
New Revision: 230776
URL: http://llvm.org/viewvc/llvm-project?rev=230776&view=rev
Log:
Delete LLVM_DELETED_FUNCTION from coding standards
It didn't seem worth leaving behind a guideline to use '= delete' to
make a class uncopyable. That's a well known C++ design pattern.
Reported on the mailing list and in PR22724.
Modified:
llvm/trunk/docs/CodingStandards.rst
Modified: llvm/trunk/docs/CodingStandards.rst
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/docs/CodingStandards.rst?rev=230776&r1=230775&r2=230776&view=diff
==============================================================================
--- llvm/trunk/docs/CodingStandards.rst (original)
+++ llvm/trunk/docs/CodingStandards.rst Fri Feb 27 12:34:16 2015
@@ -1301,34 +1301,6 @@ that the enum expression may take any re
individual enumerators. To suppress this warning, use ``llvm_unreachable`` after
the switch.
-Use ``LLVM_DELETED_FUNCTION`` to mark uncallable methods
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-Prior to C++11, a common pattern to make a class uncopyable was to declare an
-unimplemented copy constructor and copy assignment operator and make them
-private. This would give a compiler error for accessing a private method or a
-linker error because it wasn't implemented.
-
-With C++11, we can mark methods that won't be implemented with ``= delete``.
-This will trigger a much better error message and tell the compiler that the
-method will never be implemented. This enables other checks like
-``-Wunused-private-field`` to run correctly on classes that contain these
-methods.
-
-For compatibility with MSVC, ``LLVM_DELETED_FUNCTION`` should be used which
-will expand to ``= delete`` on compilers that support it. These methods should
-still be declared private. Example of the uncopyable pattern:
-
-.. code-block:: c++
-
- class DontCopy {
- private:
- DontCopy(const DontCopy&) LLVM_DELETED_FUNCTION;
- DontCopy &operator =(const DontCopy&) LLVM_DELETED_FUNCTION;
- public:
- ...
- };
-
Don't evaluate ``end()`` every time through a loop
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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