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authorDimitry Andric <dim@FreeBSD.org>2017-12-18 20:11:37 +0000
committerDimitry Andric <dim@FreeBSD.org>2017-12-18 20:11:37 +0000
commit461a67fa15370a9ec88f8f8a240bf7c123bb2029 (patch)
tree6942083d7d56bba40ec790a453ca58ad3baf6832 /test/Parser/cxx1z-fold-expressions.cpp
parent75c3240472ba6ac2669ee72ca67eb72d4e2851fc (diff)
downloadsrc-461a67fa15370a9ec88f8f8a240bf7c123bb2029.tar.gz
src-461a67fa15370a9ec88f8f8a240bf7c123bb2029.zip
Vendor import of clang trunk r321017:vendor/clang/clang-trunk-r321017
Notes
Notes: svn path=/vendor/clang/dist/; revision=326941 svn path=/vendor/clang/clang-trunk-r321017/; revision=326942; tag=vendor/clang/clang-trunk-r321017
Diffstat (limited to 'test/Parser/cxx1z-fold-expressions.cpp')
-rw-r--r--test/Parser/cxx1z-fold-expressions.cpp17
1 files changed, 17 insertions, 0 deletions
diff --git a/test/Parser/cxx1z-fold-expressions.cpp b/test/Parser/cxx1z-fold-expressions.cpp
index b1f7318e410d..342f11555fa7 100644
--- a/test/Parser/cxx1z-fold-expressions.cpp
+++ b/test/Parser/cxx1z-fold-expressions.cpp
@@ -43,3 +43,20 @@ template<typename ...T> void as_operand_of_cast(int a, T ...t) {
(int)(undeclared_junk + ...) + // expected-error {{undeclared}}
(int)(a + ...); // expected-error {{does not contain any unexpanded}}
}
+
+// fold-operator can be '>' or '>>'.
+template <int... N> constexpr bool greaterThan() { return (N > ...); }
+template <int... N> constexpr int rightShift() { return (N >> ...); }
+
+static_assert(greaterThan<2, 1>());
+static_assert(rightShift<10, 1>() == 5);
+
+template <auto V> constexpr auto Identity = V;
+
+// Support fold operators within templates.
+template <int... N> constexpr int nestedFoldOperator() {
+ return Identity<(Identity<0> >> ... >> N)> +
+ Identity<(N >> ... >> Identity<0>)>;
+}
+
+static_assert(nestedFoldOperator<3, 1>() == 1);