From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001
From: upstream source tree <ports@midipix.org>
Date: Sun, 15 Mar 2015 20:14:05 -0400
Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified
 gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream
 tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.
---
 gcc/testsuite/g++.dg/template/sfinae12.C | 47 ++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 gcc/testsuite/g++.dg/template/sfinae12.C

(limited to 'gcc/testsuite/g++.dg/template/sfinae12.C')

diff --git a/gcc/testsuite/g++.dg/template/sfinae12.C b/gcc/testsuite/g++.dg/template/sfinae12.C
new file mode 100644
index 000000000..c51211be2
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/sfinae12.C
@@ -0,0 +1,47 @@
+// DR 339
+//
+// Test of the use of the ternary operator with SFINAE
+
+// Boilerplate helpers
+typedef char yes_type;
+struct no_type { char data[2]; };
+
+template<typename T> T create_a();
+template<typename T> struct type { };
+
+template<bool, typename T = void> struct enable_if { typedef T type; };
+template<typename T> struct enable_if<false, T> { };
+
+#define JOIN( X, Y ) DO_JOIN( X, Y )
+#define DO_JOIN( X, Y ) DO_JOIN2(X,Y)
+#define DO_JOIN2( X, Y ) X##Y
+
+template<typename T, typename U, typename V>
+typename enable_if<
+           (sizeof((create_a<T>()? create_a<U>() : create_a<V>()), 0) > 0),
+           yes_type>::type
+  check_ternary(int);
+                                                            
+template<typename T, typename U, typename V> no_type check_ternary(...);
+                                                            
+template<typename T, typename U, typename V>
+struct has_ternary
+{
+  static const bool value =
+    (sizeof(check_ternary<T, U, V>(0)) == sizeof(yes_type));
+};
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+#  define STATIC_ASSERT(Expr) static_assert(Expr, #Expr)
+#else
+#  define STATIC_ASSERT(Expr) int JOIN(a,__LINE__)[Expr? 1 : -1]
+#endif
+
+struct X { };
+struct Y { operator bool(); };
+
+STATIC_ASSERT((has_ternary<int, float, double>::value));
+STATIC_ASSERT((has_ternary<bool, double, double>::value));
+STATIC_ASSERT((!has_ternary<int, float*, double>::value));
+STATIC_ASSERT((!has_ternary<X, double, double>::value));
+STATIC_ASSERT((has_ternary<Y, double, double>::value));
-- 
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