00e2098bf4
This allows `static_assert(false)` to not be ill-formed in template definitions. This change is applied as a DR in all C++ modes. Of notes, a couple of tests were relying of the eager nature of static_assert * test/SemaTemplate/instantiation-dependence.cpp * test/SemaTemplate/instantiate-var-template.cpp I don't know if the changes to `static_assert` still allow that sort of tests to be expressed. Reviewed By: #clang-language-wg, erichkeane, aaron.ballman Differential Revision: https://reviews.llvm.org/D144285
118 lines
2.0 KiB
C++
118 lines
2.0 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s
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namespace T1 {
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class A { };
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class B : private A { }; // expected-note {{declared private here}}
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void f(B* b) {
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A *a = b; // expected-error{{cannot cast 'B' to its private base class 'A'}}
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}
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}
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namespace T2 {
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class A { };
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class B : A { }; // expected-note {{implicitly declared private here}}
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void f(B* b) {
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A *a = b; // expected-error {{cannot cast 'B' to its private base class 'A'}}
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}
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}
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namespace T3 {
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class A { };
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class B : public A { };
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void f(B* b) {
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A *a = b;
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}
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}
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namespace T4 {
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class A {};
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class B : private virtual A {};
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class C : public virtual A {};
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class D : public B, public C {};
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void f(D *d) {
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// This takes the D->C->B->A path.
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A *a = d;
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}
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}
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namespace T5 {
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class A {};
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class B : private A {
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void f(B *b) {
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A *a = b;
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}
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};
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}
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namespace T6 {
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class C;
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class A {}; // expected-note{{member is declared here}}
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class B : private A { // expected-note {{declared private here}} expected-note {{constrained by private inheritance here}}
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void f(C* c);
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};
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class C : public B {
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void f(C *c) {
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A* a = c; // expected-error {{cannot cast 'C' to its private base class 'A'}} \
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// expected-error {{'A' is a private member of 'T6::A'}}
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}
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};
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void B::f(C *c) {
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A *a = c;
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}
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}
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namespace T7 {
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class A {};
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class B : public A {};
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class C : private B {
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void f(C *c) {
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A* a = c; // okay
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}
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};
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}
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namespace T8 {
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template <int>
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struct flag {
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static constexpr bool value = true;
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};
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template <class T>
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struct trait : flag<sizeof(T)> {}; // expected-note 2{{here}}
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template <class T, bool Inferred = trait<T>::value> // expected-note {{here}}
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struct a {};
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template <class T>
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class b {
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a<T> x; // expected-note {{here}}
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using U = a<T>;
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};
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template <int>
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struct Impossible {
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static_assert(false, ""); // expected-error {{static assertion failed}}
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};
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// verify "no member named 'value'" bogus diagnostic is not emitted.
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trait<b<Impossible<0>>>::value; // expected-note {{here}}
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} // namespace T8
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