commit 88626bf496e9a1276652790438b389e65950629f
author Marshall Clow <mclow.lists@gmail.com> Wed Nov 15 05:51:26 2017 +0000
committer Marshall Clow <mclow.lists@gmail.com> Wed Nov 15 05:51:26 2017 +0000
tree d975e9769477acff346690e7bfffa48a7ebd4ffc
parent 2645a49a67cd23f82f3a431adeb4488ff7a53d55

First part of P0600 - '[[nodiscard] in the standard library'. Mark the 'empty()' methods of all the containers as nodiscard. If you're calling empty() w/o looking at the result, you probably meanto to call 'clear()'. c++2a only

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@318269 91177308-0d34-0410-b5e6-96231b3b80d8

include/queue

diff --git a/include/queue b/include/queue
index feaae89..670fbb7 100644
--- a/include/queue
+++ b/include/queue
@@ -268,7 +268,7 @@
 
 #endif  // _LIBCPP_CXX03_LANG
 
-    _LIBCPP_INLINE_VISIBILITY
+    _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY
     bool      empty() const {return c.empty();}
     _LIBCPP_INLINE_VISIBILITY
     size_type size() const  {return c.size();}
@@ -490,7 +490,7 @@
                                                          _Alloc>::value>::type* = 0);
 #endif  // _LIBCPP_CXX03_LANG
 
-    _LIBCPP_INLINE_VISIBILITY
+    _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY
     bool            empty() const {return c.empty();}
     _LIBCPP_INLINE_VISIBILITY
     size_type       size() const  {return c.size();}