Merge branch 'master' of ssh://bitbucket.org/czan/honours

1 files changed, 60 insertions, 0 deletions

diff --git a/clang/test/CXX/special/class.copy/p13-0x.cpp b/clang/test/CXX/special/class.copy/p13-0x.cpp
new file mode 100644
index 0000000..0a9aa62
--- /dev/null
+++ b/clang/test/CXX/special/class.copy/p13-0x.cpp
@@ -0,0 +1,60 @@
+// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
+
+// If the implicitly-defined constructor would satisfy the requirements of a
+// constexpr constructor, the implicitly-defined constructor is constexpr.
+struct Constexpr1 {
+  constexpr Constexpr1() : n(0) {}
+  int n;
+};
+constexpr Constexpr1 c1a = Constexpr1(Constexpr1()); // ok
+constexpr Constexpr1 c1b = Constexpr1(Constexpr1(c1a)); // ok
+
+struct Constexpr2 {
+  Constexpr1 ce1;
+  constexpr Constexpr2() = default;
+  constexpr Constexpr2(const Constexpr2 &o) : ce1(o.ce1) {}
+  // no move constructor
+};
+
+constexpr Constexpr2 c2a = Constexpr2(Constexpr2()); // ok
+constexpr Constexpr2 c2b = Constexpr2(Constexpr2(c2a)); // ok
+
+struct Constexpr3 {
+  Constexpr2 ce2;
+  // all special constructors are constexpr, move ctor calls ce2's copy ctor
+};
+
+constexpr Constexpr3 c3a = Constexpr3(Constexpr3()); // ok
+constexpr Constexpr3 c3b = Constexpr3(Constexpr3(c3a)); // ok
+
+struct NonConstexprCopy {
+  constexpr NonConstexprCopy() = default;
+  NonConstexprCopy(const NonConstexprCopy &);
+  constexpr NonConstexprCopy(NonConstexprCopy &&) = default;
+
+  int n = 42;
+};
+
+NonConstexprCopy::NonConstexprCopy(const NonConstexprCopy &) = default; // expected-note {{here}}
+
+constexpr NonConstexprCopy ncc1 = NonConstexprCopy(NonConstexprCopy()); // ok
+constexpr NonConstexprCopy ncc2 = ncc1; // expected-error {{constant expression}} expected-note {{non-constexpr constructor}}
+
+struct NonConstexprDefault {
+  NonConstexprDefault() = default;
+  constexpr NonConstexprDefault(int n) : n(n) {}
+  int n;
+};
+struct Constexpr4 {
+  NonConstexprDefault ncd;
+};
+
+constexpr NonConstexprDefault ncd = NonConstexprDefault(NonConstexprDefault(1));
+constexpr Constexpr4 c4a = { ncd };
+constexpr Constexpr4 c4b = Constexpr4(c4a);
+constexpr Constexpr4 c4c = Constexpr4(static_cast<Constexpr4&&>(const_cast<Constexpr4&>(c4b)));
+
+struct Constexpr5Base {};
+struct Constexpr5 : Constexpr5Base { constexpr Constexpr5() {} };
+constexpr Constexpr5 ce5move = Constexpr5();
+constexpr Constexpr5 ce5copy = ce5move;