95 lines
3 KiB
C++
95 lines
3 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -fcxx-exceptions -verify -std=c++11 -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 {{cannot be used by non-static data member initializer}}
|
|
};
|
|
// 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 {{cannot be used by non-static data member initializer}}
|
|
};
|
|
bool x = noexcept(TemplateArg());
|
|
|
|
// And within a nested class.
|
|
struct Nested { // expected-error {{cannot be used by non-static data member initializer}}
|
|
struct Inner {
|
|
int n = ExceptionIf<noexcept(Nested())>::f(); // expected-note {{implicit default constructor for 'InClassInitializers::Nested' first required here}}
|
|
} inner;
|
|
};
|
|
|
|
struct Nested2 {
|
|
struct Inner;
|
|
int n = Inner().n; // expected-error {{cannot be used by non-static data member initializer}}
|
|
struct Inner {
|
|
int n = ExceptionIf<noexcept(Nested2())>::f();
|
|
} inner;
|
|
};
|
|
}
|
|
|
|
namespace ExceptionSpecification {
|
|
// A type is permitted to be used in a dynamic exception specification when it
|
|
// is still being defined, but isn't complete within such an exception
|
|
// specification.
|
|
struct Nested { // expected-note {{not complete}}
|
|
struct T {
|
|
T() noexcept(!noexcept(Nested())); // expected-error{{incomplete type}}
|
|
} t;
|
|
};
|
|
}
|
|
|
|
namespace DefaultArgument {
|
|
struct Default {
|
|
struct T {
|
|
T(int = ExceptionIf<noexcept(Default())::f()); // expected-error {{call to implicitly-deleted default constructor}}
|
|
} t; // expected-note {{has no default constructor}}
|
|
};
|
|
}
|
|
|
|
namespace ImplicitDtorExceptionSpec {
|
|
struct A {
|
|
virtual ~A();
|
|
|
|
struct Inner {
|
|
~Inner() throw();
|
|
};
|
|
Inner inner;
|
|
};
|
|
|
|
struct B {
|
|
virtual ~B() {} // expected-note {{here}}
|
|
};
|
|
|
|
struct C : B {
|
|
virtual ~C() {}
|
|
A a;
|
|
};
|
|
|
|
struct D : B {
|
|
~D(); // expected-error {{more lax than base}}
|
|
struct E {
|
|
~E();
|
|
struct F {
|
|
~F() throw(A);
|
|
} f;
|
|
} e;
|
|
};
|
|
}
|