[cfe-commits] [libcxx] r170435 - in /libcxx/trunk: include/array test/containers/sequences/array/array.tuple/get.fail.cpp

[Marshall Clow]

Author: marshall
Date: Tue Dec 18 10:46:30 2012
New Revision: 170435

URL: http://llvm.org/viewvc/llvm-project?rev=170435&view=rev
Log:
Added static_assert to std::get<N>(std::array) calls to catch "out of bounds" 
calls

Added:
    libcxx/trunk/test/containers/sequences/array/array.tuple/get.fail.cpp
Modified:
    libcxx/trunk/include/array

Modified: libcxx/trunk/include/array
URL: 
http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/array?rev=170435&r1=170434&r2=170435&view=diff
==============================================================================
--- libcxx/trunk/include/array (original)
+++ libcxx/trunk/include/array Tue Dec 18 10:46:30 2012
@@ -310,6 +310,7 @@
 _Tp&
 get(array<_Tp, _Size>& __a) _NOEXCEPT
 {
+    static_assert(_Ip < _Size, "Index out of bounds in std::get<> 
(std::array)");
     return __a[_Ip];
 }
 
@@ -318,6 +319,7 @@
 const _Tp&
 get(const array<_Tp, _Size>& __a) _NOEXCEPT
 {
+    static_assert(_Ip < _Size, "Index out of bounds in std::get<> (const 
std::array)");
     return __a[_Ip];
 }
 
@@ -328,6 +330,7 @@
 _Tp&&
 get(array<_Tp, _Size>&& __a) _NOEXCEPT
 {
+    static_assert(_Ip < _Size, "Index out of bounds in std::get<> (std::array 
&&)");
     return _VSTD::move(__a[_Ip]);
 }
 

Added: libcxx/trunk/test/containers/sequences/array/array.tuple/get.fail.cpp
URL: 
http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/containers/sequences/array/array.tuple/get.fail.cpp?rev=170435&view=auto
==============================================================================
--- libcxx/trunk/test/containers/sequences/array/array.tuple/get.fail.cpp 
(added)
+++ libcxx/trunk/test/containers/sequences/array/array.tuple/get.fail.cpp Tue 
Dec 18 10:46:30 2012
@@ -0,0 +1,25 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <array>
+
+// template <size_t I, class T, size_t N> T& get(array<T, N>& a);
+
+#include <array>
+#include <cassert>
+
+int main()
+{
+    {
+        typedef double T;
+        typedef std::array<T, 3> C;
+        C c = {1, 2, 3.5};
+        std::get<3>(c) = 5.5;  // Can't get element 3!
+    }
+}


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