342 lines
10 KiB
C++
342 lines
10 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify -Wbind-to-temporary-copy %s
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// RUN: %clang_cc1 -fsyntax-only -verify -Wbind-to-temporary-copy -std=c++98 %s
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// RUN: %clang_cc1 -fsyntax-only -verify -Wbind-to-temporary-copy -std=c++11 %s
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// Make sure we don't produce invalid IR.
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// RUN: %clang_cc1 -emit-llvm-only %s
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// RUN: %clang_cc1 -emit-llvm-only -std=c++98 %s
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// RUN: %clang_cc1 -emit-llvm-only -std=c++11 %s
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namespace test1 {
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static void foo(); // expected-warning {{function 'test1::foo' has internal linkage but is not defined}}
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template <class T> static void bar(); // expected-warning {{function 'test1::bar<int>' has internal linkage but is not defined}}
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void test() {
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foo(); // expected-note {{used here}}
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bar<int>(); // expected-note {{used here}}
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}
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}
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namespace test2 {
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namespace {
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void foo(); // expected-warning {{function 'test2::(anonymous namespace)::foo' has internal linkage but is not defined}}
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extern int var; // expected-warning {{variable 'test2::(anonymous namespace)::var' has internal linkage but is not defined}}
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template <class T> void bar(); // expected-warning {{function 'test2::(anonymous namespace)::bar<int>' has internal linkage but is not defined}}
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}
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void test() {
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foo(); // expected-note {{used here}}
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var = 0; // expected-note {{used here}}
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bar<int>(); // expected-note {{used here}}
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}
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}
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namespace test3 {
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namespace {
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void foo();
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extern int var;
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template <class T> void bar();
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}
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void test() {
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foo();
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var = 0;
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bar<int>();
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}
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namespace {
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void foo() {}
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int var = 0;
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template <class T> void bar() {}
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}
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}
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namespace test4 {
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namespace {
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struct A {
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A(); // expected-warning {{function 'test4::(anonymous namespace)::A::A' has internal linkage but is not defined}}
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~A();// expected-warning {{function 'test4::(anonymous namespace)::A::~A' has internal linkage but is not defined}}
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virtual void foo(); // expected-warning {{function 'test4::(anonymous namespace)::A::foo' has internal linkage but is not defined}}
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virtual void bar() = 0;
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virtual void baz(); // expected-warning {{function 'test4::(anonymous namespace)::A::baz' has internal linkage but is not defined}}
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};
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}
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void test(A &a) {
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a.foo(); // expected-note {{used here}}
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a.bar();
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a.baz(); // expected-note {{used here}}
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}
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struct Test : A {
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Test() {} // expected-note 2 {{used here}}
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};
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}
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// rdar://problem/9014651
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namespace test5 {
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namespace {
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struct A {};
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}
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template <class N> struct B {
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static int var; // expected-warning {{variable 'test5::B<test5::(anonymous namespace)::A>::var' has internal linkage but is not defined}}
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static void foo(); // expected-warning {{function 'test5::B<test5::(anonymous namespace)::A>::foo' has internal linkage but is not defined}}
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};
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void test() {
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B<A>::var = 0; // expected-note {{used here}}
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B<A>::foo(); // expected-note {{used here}}
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}
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}
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namespace test6 {
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template <class T> struct A {
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static const int zero = 0;
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static const int one = 1;
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static const int two = 2;
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int value;
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A() : value(zero) {
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value = one;
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}
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};
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namespace { struct Internal; }
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void test() {
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A<Internal> a;
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a.value = A<Internal>::two;
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}
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}
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// We support (as an extension) private, undefined copy constructors when
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// a temporary is bound to a reference even in C++98. Similarly, we shouldn't
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// warn about this copy constructor being used without a definition.
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namespace PR9323 {
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namespace {
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struct Uncopyable {
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Uncopyable() {}
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private:
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Uncopyable(const Uncopyable&); // expected-note {{declared private here}}
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};
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}
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void f(const Uncopyable&) {}
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void test() {
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f(Uncopyable());
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#if __cplusplus <= 199711L // C++03 or earlier modes
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// expected-warning@-2 {{C++98 requires an accessible copy constructor}}
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#else
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// expected-warning@-4 {{copying parameter of type 'PR9323::(anonymous namespace)::Uncopyable' when binding a reference to a temporary would invoke an inaccessible constructor in C++98}}
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#endif
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};
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}
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namespace std { class type_info; };
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namespace cxx11_odr_rules {
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// Note: the way this test is written isn't really ideal, but there really
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// isn't any other way to check that the odr-used logic for constants
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// is working without working implicit capture in lambda-expressions.
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// (The more accurate used-but-not-defined warning is the only other visible
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// effect of accurate odr-used computation.)
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//
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// Note that the warning in question can trigger in cases some people would
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// consider false positives; hopefully that happens rarely in practice.
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//
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// FIXME: Suppressing this test while I figure out how to fix a bug in the
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// odr-use marking code.
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namespace {
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struct A {
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static const int unused = 10;
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static const int used1 = 20; // xpected-warning {{internal linkage}}
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static const int used2 = 20; // xpected-warning {{internal linkage}}
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virtual ~A() {}
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};
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}
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void a(int,int);
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A& p(const int&) { static A a; return a; }
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// Check handling of default arguments
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void b(int = A::unused);
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void tests() {
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// Basic test
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a(A::unused, A::unused);
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// Check that nesting an unevaluated or constant-evaluated context does
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// the right thing.
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a(A::unused, sizeof(int[10]));
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// Check that the checks work with unevaluated contexts
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(void)sizeof(p(A::used1));
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(void)typeid(p(A::used1)); // expected-warning {{expression with side effects will be evaluated despite being used as an operand to 'typeid'}} xpected-note {{used here}}
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// Misc other testing
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a(A::unused, 1 ? A::used2 : A::used2); // xpected-note {{used here}}
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b();
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}
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}
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namespace OverloadUse {
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namespace {
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void f();
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void f(int); // expected-warning {{function 'OverloadUse::(anonymous namespace)::f' has internal linkage but is not defined}}
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}
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template<void x()> void t(int*) { x(); }
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template<void x(int)> void t(long*) { x(10); } // expected-note {{used here}}
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void g() { long a; t<f>(&a); }
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}
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namespace test7 {
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typedef struct {
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void bar();
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void foo() {
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bar();
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}
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} A;
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}
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namespace test8 {
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typedef struct {
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void bar(); // expected-warning {{function 'test8::(anonymous struct)::bar' has internal linkage but is not defined}}
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void foo() {
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bar(); // expected-note {{used here}}
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}
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} *A;
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}
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namespace test9 {
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namespace {
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struct X {
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virtual void notused() = 0;
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virtual void used() = 0; // expected-warning {{function 'test9::(anonymous namespace)::X::used' has internal linkage but is not defined}}
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};
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}
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void test(X &x) {
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x.notused();
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x.X::used(); // expected-note {{used here}}
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}
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}
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namespace test10 {
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namespace {
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struct X {
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virtual void notused() = 0;
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virtual void used() = 0; // expected-warning {{function 'test10::(anonymous namespace)::X::used' has internal linkage but is not defined}}
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void test() {
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notused();
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(void)&X::notused;
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(this->*&X::notused)();
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X::used(); // expected-note {{used here}}
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}
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};
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struct Y : X {
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using X::notused;
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};
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}
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}
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namespace test11 {
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namespace {
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struct A {
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virtual bool operator()() const = 0;
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virtual void operator!() const = 0;
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virtual bool operator+(const A&) const = 0;
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virtual int operator[](int) const = 0;
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virtual const A* operator->() const = 0;
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int member;
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};
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struct B {
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bool operator()() const; // expected-warning {{function 'test11::(anonymous namespace)::B::operator()' has internal linkage but is not defined}}
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void operator!() const; // expected-warning {{function 'test11::(anonymous namespace)::B::operator!' has internal linkage but is not defined}}
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bool operator+(const B&) const; // expected-warning {{function 'test11::(anonymous namespace)::B::operator+' has internal linkage but is not defined}}
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int operator[](int) const; // expected-warning {{function 'test11::(anonymous namespace)::B::operator[]' has internal linkage but is not defined}}
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const B* operator->() const; // expected-warning {{function 'test11::(anonymous namespace)::B::operator->' has internal linkage but is not defined}}
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int member;
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};
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}
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void test1(A &a1, A &a2) {
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a1();
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!a1;
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a1 + a2;
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a1[0];
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(void)a1->member;
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}
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void test2(B &b1, B &b2) {
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b1(); // expected-note {{used here}}
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!b1; // expected-note {{used here}}
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b1 + b2; // expected-note {{used here}}
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b1[0]; // expected-note {{used here}}
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(void)b1->member; // expected-note {{used here}}
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}
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}
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namespace test12 {
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class T1 {}; class T2 {}; class T3 {}; class T4 {}; class T5 {}; class T6 {};
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class T7 {};
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namespace {
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struct Cls {
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virtual void f(int) = 0;
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virtual void f(int, double) = 0;
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void g(int); // expected-warning {{function 'test12::(anonymous namespace)::Cls::g' has internal linkage but is not defined}}
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void g(int, double);
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virtual operator T1() = 0;
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virtual operator T2() = 0;
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virtual operator T3&() = 0;
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operator T4(); // expected-warning {{function 'test12::(anonymous namespace)::Cls::operator T4' has internal linkage but is not defined}}
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operator T5(); // expected-warning {{function 'test12::(anonymous namespace)::Cls::operator T5' has internal linkage but is not defined}}
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operator T6&(); // expected-warning {{function 'test12::(anonymous namespace)::Cls::operator test12::T6 &' has internal linkage but is not defined}}
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};
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struct Cls2 {
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Cls2(T7); // expected-warning {{function 'test12::(anonymous namespace)::Cls2::Cls2' has internal linkage but is not defined}}
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};
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}
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void test(Cls &c) {
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c.f(7);
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c.g(7); // expected-note {{used here}}
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(void)static_cast<T1>(c);
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T2 t2 = c;
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T3 &t3 = c;
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(void)static_cast<T4>(c); // expected-note {{used here}}
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T5 t5 = c; // expected-note {{used here}}
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T6 &t6 = c; // expected-note {{used here}}
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Cls2 obj1((T7())); // expected-note {{used here}}
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}
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}
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namespace test13 {
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namespace {
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struct X {
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virtual void f() { }
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};
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struct Y : public X {
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virtual void f() = 0;
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virtual void g() {
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X::f();
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}
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};
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}
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}
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namespace test14 {
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extern "C" const int foo;
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int f() {
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return foo;
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}
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}
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