forked from OSchip/llvm-project
80 lines
1.8 KiB
C++
80 lines
1.8 KiB
C++
// RUN: %clang_cc1 %s -fsyntax-only -verify -triple %itanium_abi_triple -Wweak-vtables -Wweak-template-vtables
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// RUN: %clang_cc1 %s -fsyntax-only -triple %ms_abi_triple -Werror -Wno-weak-vtables -Wno-weak-template-vtables
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struct A { // expected-warning {{'A' has no out-of-line virtual method definitions; its vtable will be emitted in every translation unit}}
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virtual void f() { }
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};
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template<typename T> struct B {
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virtual void f() { }
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};
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namespace {
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struct C {
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virtual void f() { }
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};
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}
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void f() {
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struct A {
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virtual void f() { }
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};
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A *a;
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a->f();
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}
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// Use the vtables
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void uses(A &a, B<int> &b, C &c) {
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a.f();
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b.f();
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c.f();
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}
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// <rdar://problem/9979458>
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class Parent {
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public:
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Parent() {}
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virtual ~Parent();
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virtual void * getFoo() const = 0;
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};
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class Derived : public Parent {
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public:
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Derived();
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void * getFoo() const;
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};
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class VeryDerived : public Derived { // expected-warning{{'VeryDerived' has no out-of-line virtual method definitions; its vtable will be emitted in every translation unit}}
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public:
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void * getFoo() const { return 0; }
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};
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Parent::~Parent() {}
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void uses(Parent &p, Derived &d, VeryDerived &vd) {
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p.getFoo();
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d.getFoo();
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vd.getFoo();
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}
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template<typename T> struct TemplVirt {
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virtual void f();
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};
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template class TemplVirt<float>; // expected-warning{{explicit template instantiation 'TemplVirt<float>' will emit a vtable in every translation unit}}
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template<> struct TemplVirt<bool> {
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virtual void f();
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};
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template<> struct TemplVirt<long> { // expected-warning{{'TemplVirt<long>' has no out-of-line virtual method definitions; its vtable will be emitted in every translation unit}}
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virtual void f() {}
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};
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void uses(TemplVirt<float>& f, TemplVirt<bool>& b, TemplVirt<long>& l) {
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f.f();
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b.f();
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l.f();
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}
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