Add the clang library to the repo (with some of my changes, too).

1 files changed, 37 insertions, 0 deletions

diff --git a/clang/test/CXX/dcl.dcl/dcl.spec/dcl.constexpr/p9.cpp b/clang/test/CXX/dcl.dcl/dcl.spec/dcl.constexpr/p9.cpp
new file mode 100644
index 0000000..2412a14
--- /dev/null
+++ b/clang/test/CXX/dcl.dcl/dcl.spec/dcl.constexpr/p9.cpp
@@ -0,0 +1,37 @@
+// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
+
+// A constexpr specifier used in an object declaration declares the object as
+// const.
+constexpr int a = 0;
+extern const int a;
+
+int i; // expected-note 2{{here}}
+constexpr int *b = &i;
+extern int *const b;
+
+constexpr int &c = i;
+extern int &c;
+
+constexpr int (*d)(int) = 0;
+extern int (*const d)(int);
+
+// A variable declaration which uses the constexpr specifier shall have an
+// initializer and shall be initialized by a constant expression.
+constexpr int ni1; // expected-error {{default initialization of an object of const type 'const int'}}
+constexpr struct C { C(); } ni2; // expected-error {{cannot have non-literal type 'const struct C'}} expected-note 3{{has no constexpr constructors}}
+constexpr double &ni3; // expected-error {{declaration of reference variable 'ni3' requires an initializer}}
+
+constexpr int nc1 = i; // expected-error {{constexpr variable 'nc1' must be initialized by a constant expression}} expected-note {{read of non-const variable 'i' is not allowed in a constant expression}}
+constexpr C nc2 = C(); // expected-error {{cannot have non-literal type 'const C'}}
+int &f(); // expected-note {{declared here}}
+constexpr int &nc3 = f(); // expected-error {{constexpr variable 'nc3' must be initialized by a constant expression}} expected-note {{non-constexpr function 'f' cannot be used in a constant expression}}
+constexpr int nc4(i); // expected-error {{constexpr variable 'nc4' must be initialized by a constant expression}} expected-note {{read of non-const variable 'i' is not allowed in a constant expression}}
+constexpr C nc5((C())); // expected-error {{cannot have non-literal type 'const C'}}
+int &f(); // expected-note {{here}}
+constexpr int &nc6(f()); // expected-error {{constexpr variable 'nc6' must be initialized by a constant expression}} expected-note {{non-constexpr function 'f'}}
+
+struct pixel {
+  int x, y;
+};
+constexpr pixel ur = { 1294, 1024 }; // ok
+constexpr pixel origin;              // expected-error {{default initialization of an object of const type 'const pixel' requires a user-provided default constructor}}