Implement support for C++11 in-class initialization of non-static data members.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@132878 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/SemaCXX/implicit-exception-spec.cpp b/test/SemaCXX/implicit-exception-spec.cpp
new file mode 100644
index 0000000..81babc0
--- /dev/null
+++ b/test/SemaCXX/implicit-exception-spec.cpp
@@ -0,0 +1,63 @@
+// RUN: %clang_cc1 -fsyntax-only -fcxx-exceptions -verify -std=c++0x -Wall %s
+
+template<bool b> struct ExceptionIf { static int f(); };
+template<> struct ExceptionIf<false> { typedef int f; };
+
+// The exception specification of a defaulted default constructor depends on
+// the contents of in-class member initializers. However, the in-class member
+// initializers can depend on the exception specification of the constructor,
+// since the class is considered complete within them. We reject any such cases.
+namespace InClassInitializers {
+ // Noexcept::Noexcept() is implicitly declared as noexcept(false), because it
+ // directly invokes ThrowSomething(). However...
+ //
+ // If noexcept(Noexcept()) is false, then Noexcept() is a constant expression,
+ // so noexcept(Noexcept()) is true. But if noexcept(Noexcept()) is true, then
+ // Noexcept::Noexcept is not declared constexpr, therefore noexcept(Noexcept())
+ // is false.
+ bool ThrowSomething() noexcept(false);
+ struct ConstExpr {
+ bool b = noexcept(ConstExpr()) && ThrowSomething(); // expected-error {{exception specification is not available until end of class definition}}
+ };
+ // We can use it now.
+ bool w = noexcept(ConstExpr());
+
+ // Much more obviously broken: we can't parse the initializer without already
+ // knowing whether it produces a noexcept expression.
+ struct TemplateArg {
+ int n = ExceptionIf<noexcept(TemplateArg())>::f(); // expected-error {{exception specification is not available until end of class definition}}
+ };
+ bool x = noexcept(TemplateArg());
+
+ // And within a nested class.
+ struct Nested {
+ struct Inner {
+ int n = ExceptionIf<noexcept(Nested())>::f(); // expected-error {{exception specification is not available until end of class definition}}
+ } inner;
+ };
+ bool y = noexcept(Nested());
+ bool z = noexcept(Nested::Inner());
+}
+
+// FIXME:
+// The same problem arises in delayed parsing of exception specifications,
+// which clang does not yet support.
+namespace ExceptionSpecification {
+ struct Nested { // expected-note {{not complete}}
+ struct T {
+ T() noexcept(!noexcept(Nested())); // expected-error {{incomplete type}}
+ } t;
+ };
+}
+
+// FIXME:
+// The same problem arises in delayed parsing of default arguments,
+// which clang does not yet support.
+namespace DefaultArgument {
+ // FIXME: this diagnostic is completely wrong.
+ struct Default { // expected-note {{explicitly marked deleted here}}
+ struct T {
+ T(int = ExceptionIf<noexcept(Default())::f()); // expected-error {{call to deleted constructor}}
+ } t;
+ };
+}