// 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
// RUN: %clang_cc1 -fsyntax-only -verify -Wbind-to-temporary-copy %s -fexperimental-new-constant-interpreter
// RUN: %clang_cc1 -fsyntax-only -verify -Wbind-to-temporary-copy -std=c++98 %s -fexperimental-new-constant-interpreter
// RUN: %clang_cc1 -fsyntax-only -verify -Wbind-to-temporary-copy -std=c++11 %s -fexperimental-new-constant-interpreter
// 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
// RUN: %clang_cc1 -emit-llvm-only %s -fexperimental-new-constant-interpreter
// RUN: %clang_cc1 -emit-llvm-only -std=c++98 %s -fexperimental-new-constant-interpreter
// RUN: %clang_cc1 -emit-llvm-only -std=c++11 %s -fexperimental-new-constant-interpreter
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}}
};
}
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}}
};
extern template int B<A>::var;
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 '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}}
void f(int, int); // expected-warning {{function 'OverloadUse::(anonymous namespace)::f' has internal linkage but is not defined}}
#if __cplusplus < 201103L
// expected-note@-3 {{here}}
// expected-note@-3 {{here}}
#endif
}
template<void x()> void t() { x(); }
template<void x(int)> void t(int*) { x(10); }
template<void x(int, int)> void t(int*, int*) {}
void g(int n) {
t<f>(&n); // expected-note {{used here}}
t<f>(&n, &n); // expected-note {{used here}}
#if __cplusplus < 201103L
// expected-warning@-3 {{non-type template argument referring to function 'f' with internal linkage}}
// expected-warning@-3 {{non-type template argument referring to function 'f' with internal linkage}}
#endif
}
}
namespace test7 {
typedef struct { // expected-warning {{add a tag name}}
void bar(); // expected-note {{this member}}
void foo() {
bar();
}
} A; // expected-note {{this typedef}}
}
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;
}
}
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