From: paolo <paolo@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed, 25 Nov 2015 10:00:02 +0000 (+0000)
Subject: 2015-11-25  Paolo Carlini  <paolo.carlini@oracle.com>
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=010eee56fd3144e80819afb153f0124cdbb72241;p=thirdparty%2Fgcc.git

2015-11-25  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/58910
	* g++.dg/cpp0x/constexpr-tuple2.C: New.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@230860 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index a1bbe87e3d72..789058a6f73d 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2015-11-25  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/58910
+	* g++.dg/cpp0x/constexpr-tuple2.C: New.
+
 2015-11-25  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
 
 	PR rtl-optimization/68435
diff --git a/gcc/testsuite/g++.dg/cpp0x/constexpr-tuple2.C b/gcc/testsuite/g++.dg/cpp0x/constexpr-tuple2.C
new file mode 100644
index 000000000000..10b09b690bc4
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/constexpr-tuple2.C
@@ -0,0 +1,20 @@
+// PR c++/58910
+// { dg-do compile { target c++11 } }
+
+#include <tuple>
+
+using namespace std;
+struct t1{ constexpr t1(){} };
+struct t2{ constexpr t2(){} };
+
+int main()
+{
+  constexpr t1 T1;
+  constexpr t2 T2;
+  constexpr tuple<t1,t2> Tup1(T1,T2);
+  constexpr tuple<t1,t1> Tup2(T1,T1);
+  constexpr auto a=get<0>(Tup1 ); //works fine
+  constexpr auto b=get<0>(Tup2 ); // error: 
+  //'(const std::_Head_base<0ul, t1, true>*)(& Tup2)' 
+  //is not a constant expression constexpr auto b=get<0>(Tup2 );
+}