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