// RUN: %clang_cc1 -fsyntax-only -verify=expected,cxx98-23,precxx20 %s -triple=i686-pc-linux-gnu -Wno-new-returns-null -std=c++98
// RUN: %clang_cc1 -fsyntax-only -verify=expected,cxx98-23,precxx20 %s -triple=i686-pc-linux-gnu -Wno-new-returns-null -std=c++11
// RUN: %clang_cc1 -fsyntax-only -verify=expected,cxx98-23,precxx20 %s -triple=i686-pc-linux-gnu -Wno-new-returns-null -std=c++14
// RUN: %clang_cc1 -fsyntax-only -verify=expected,cxx98-23,cxx17,precxx20 %s -triple=i686-pc-linux-gnu -Wno-new-returns-null -std=c++17
// RUN: %clang_cc1 -fsyntax-only -verify=expected,cxx98-23,cxx17,cxx20 %s -triple=i686-pc-linux-gnu -Wno-new-returns-null -std=c++20
// RUN: %clang_cc1 -fsyntax-only -verify=expected,cxx98-23,cxx17,cxx20 %s -triple=i686-pc-linux-gnu -Wno-new-returns-null -std=c++23
// RUN: %clang_cc1 -fsyntax-only -verify=expected,since-cxx26,cxx17,cxx20 %s -triple=i686-pc-linux-gnu -Wno-new-returns-null -std=c++2c
// RUN: %clang_cc1 -fsyntax-only -verify=expected,cxx98-23,precxx20 %s -triple=i686-pc-linux-gnu -Wno-new-returns-null -std=c++98 -fexperimental-new-constant-interpreter -DNEW_INTERP
// RUN: %clang_cc1 -fsyntax-only -verify=expected,cxx98-23,precxx20 %s -triple=i686-pc-linux-gnu -Wno-new-returns-null -std=c++11 -fexperimental-new-constant-interpreter -DNEW_INTERP
// RUN: %clang_cc1 -fsyntax-only -verify=expected,cxx98-23,precxx20 %s -triple=i686-pc-linux-gnu -Wno-new-returns-null -std=c++14 -fexperimental-new-constant-interpreter -DNEW_INTERP
// RUN: %clang_cc1 -fsyntax-only -verify=expected,cxx98-23,cxx17,precxx20 %s -triple=i686-pc-linux-gnu -Wno-new-returns-null -std=c++17 -fexperimental-new-constant-interpreter -DNEW_INTERP
// RUN: %clang_cc1 -fsyntax-only -verify=expected,cxx98-23,cxx17,cxx20 %s -triple=i686-pc-linux-gnu -Wno-new-returns-null -std=c++20 -fexperimental-new-constant-interpreter -DNEW_INTERP
// RUN: %clang_cc1 -fsyntax-only -verify=expected,cxx98-23,cxx17,cxx20 %s -triple=i686-pc-linux-gnu -Wno-new-returns-null -std=c++23 -fexperimental-new-constant-interpreter -DNEW_INTERP
// RUN: %clang_cc1 -fsyntax-only -verify=expected,since-cxx26,cxx17,cxx20 %s -triple=i686-pc-linux-gnu -Wno-new-returns-null -std=c++2c -fexperimental-new-constant-interpreter -DNEW_INTERP
// FIXME Location is (frontend)
// cxx17-note@*:* {{candidate function not viable: requires 2 arguments, but 3 were provided}}
#include <stddef.h>
#if __cplusplus >= 201103L
// expected-note@+2 {{candidate constructor (the implicit move constructor) not viable}}
#endif
struct S // expected-note {{candidate}}
{
S(int, int, double); // expected-note {{candidate}}
S(double, int); // expected-note 2 {{candidate}}
S(float, int); // expected-note 2 {{candidate}}
};
struct T; // expected-note{{forward declaration of 'T'}}
struct U
{
// A special new, to verify that the global version isn't used.
void* operator new(size_t, S*); // expected-note {{candidate}}
};
struct V : U
{
};
struct W // cxx20-note 2{{candidate constructor}}
{
int a;
int b;
};
inline void operator delete(void *); // expected-warning {{replacement function 'operator delete' cannot be declared 'inline'}}
__attribute__((used))
inline void *operator new(size_t) { // no warning, due to __attribute__((used))
return 0; // expected-warning {{null returned from function that requires a non-null return value}}
}
// PR5823
void* operator new(const size_t); // expected-note {{candidate}}
void* operator new(size_t, int*); // expected-note 2{{candidate}}
void* operator new(size_t, float*); // expected-note 2{{candidate}}
void* operator new(size_t, S); // expected-note {{candidate}}
struct foo { };
void good_news()
{
int *pi = new int;
float *pf = new (pi) float();
pi = new int(1);
pi = new int('c');
const int *pci = new const int();
S *ps = new S(1, 2, 3.4);
ps = new (pf) (S)(1, 2, 3.4);
S *(*paps)[2] = new S*[*pi][2];
typedef int ia4[4];
ia4 *pai = new (int[3][4]);
pi = ::new int;
U *pu = new (ps) U;
V *pv = new (ps) V;
pi = new (S(1.0f, 2)) int;
(void)new int[true];
// PR7147
typedef int a[2];
foo* f1 = new foo;
foo* f2 = new foo[2];
typedef foo x[2];
typedef foo y[2][2];
x* f3 = new y;
#if __cplusplus >= 201103L
(void)new int[]{};
(void)new int[]{1, 2, 3};
(void)new char[]{"hello"};
#endif
}
struct abstract {
virtual ~abstract() = 0;
};
void bad_news(int *ip)
{
int i = 1; // expected-note 2{{here}}
(void)new; // expected-error {{expected a type}}
(void)new 4; // expected-error {{expected a type}}
(void)new () int; // expected-error {{expected expression}}
(void)new int[1.1];
#if __cplusplus <= 199711L
// expected-error@-2 {{array size expression must have integral or enumeration type, not 'double'}}
#elif __cplusplus <= 201103L
// expected-error@-4 {{array size expression must have integral or unscoped enumeration type, not 'double'}}
#else
// expected-warning@-6 {{implicit conversion from 'double' to 'unsigned int' changes value from 1.1 to 1}}
#endif
(void)new int[1][i]; // expected-note {{read of non-const variable 'i' is not allowed in a constant expression}}
(void)new (int[1][i]); // expected-note {{read of non-const variable 'i' is not allowed in a constant expression}}
#if __cplusplus <= 201103L
// expected-error@-3 {{only the first dimension}}
// expected-error@-3 {{only the first dimension}}
#else
// expected-error@-6 {{array size is not a constant expression}}
// expected-error@-6 {{array size is not a constant expression}}
#endif
(void)new (int[i]); // expected-warning {{when type is in parentheses}}
(void)new int(*(S*)0); // expected-error {{no viable conversion from 'S' to 'int'}}
(void)new int(1, 2); // expected-error {{excess elements in scalar initializer}}
(void)new S(1); // expected-error {{no matching constructor}}
(void)new S(1, 1); // expected-error {{call to constructor of 'S' is ambiguous}}
(void)new const int; // expected-error {{default initialization of an object of const type 'const int'}}
(void)new float*(ip); // expected-error {{cannot initialize a new value of type 'float *' with an lvalue of type 'int *'}}
// Undefined, but clang should reject it directly.
(void)new int[-1];
#if __cplusplus <= 201103L
// expected-error@-2 {{array size is negative}}
#else
// expected-error@-4 {{array is too large}}
#endif
(void)new int[2000000000]; // expected-error {{array is too large}}
(void)new int[*(S*)0];
#if __cplusplus <= 199711L
// expected-error@-2 {{array size expression must have integral or enumeration type, not 'S'}}
#elif __cplusplus <= 201103L
// expected-error@-4 {{array size expression must have integral or unscoped enumeration type, not 'S'}}
#else
// expected-error@-6 {{converting 'S' to incompatible type}}
#endif
(void)::S::new int; // expected-error {{expected unqualified-id}}
(void)new (0, 0) int; // expected-error {{no matching function for call to 'operator new'}}
(void)new (0L) int; // expected-error {{call to 'operator new' is ambiguous}}
// This must fail, because the member version shouldn't be found.
(void)::new ((S*)0) U; // expected-error {{no matching 'operator new' function for non-allocating placement new expression; include <new>}}
// This must fail, because any member version hides all global versions.
(void)new U; // expected-error {{no matching function for call to 'operator new'}}
(void)new (int[]); // expected-error {{array size must be specified in new expression with no initializer}}
(void)new int&; // expected-error {{cannot allocate reference type 'int &' with new}}
(void)new int[]; // expected-error {{array size must be specified in new expression with no initializer}}
(void)new int[](); // expected-error {{cannot determine allocated array size from initializer}}
// FIXME: This is a terrible diagnostic.
#if __cplusplus < 201103L
(void)new int[]{}; // expected-error {{array size must be specified in new expression with no initializer}}
#endif
}
void no_matching_placement_new() {
struct X { int n; };
__attribute__((aligned(__alignof(X)))) unsigned char buffer[sizeof(X)];
(void)new(buffer) X; // expected-error {{no matching 'operator new' function for non-allocating placement new expression; include <new>}}
(void)new(+buffer) X; // expected-error {{no matching 'operator new' function for non-allocating placement new expression; include <new>}}
(void)new(&buffer) X; // expected-error {{no matching 'operator new' function for non-allocating placement new expression; include <new>}}
}
void good_deletes()
{
delete (int*)0;
delete [](int*)0;
delete (S*)0;
::delete (int*)0;
}
void bad_deletes()
{
delete 0; // expected-error {{cannot delete expression of type 'int'}}
delete [0] (int*)0; // expected-error {{expected variable name or 'this' in lambda capture list}}
delete (void*)0;
// cxx98-23-warning@-1 {{cannot delete expression with pointer-to-'void' type 'void *'}}
// since-cxx26-error@-2 {{cannot delete pointer to incomplete type 'void'}}
delete (T*)0;
// cxx98-23-warning@-1 {{deleting pointer to incomplete type}}
// since-cxx26-error@-2 {{cannot delete pointer to incomplete type 'T'}}
::S::delete (int*)0; // expected-error {{expected unqualified-id}}
}
struct X0 { };
struct X1 {
operator int*();
operator float();
};
struct X2 {
operator int*(); // expected-note {{conversion}}
operator float*(); // expected-note {{conversion}}
};
void test_delete_conv(X0 x0, X1 x1, X2 x2) {
delete x0; // expected-error{{cannot delete}}
delete x1;
delete x2; // expected-error{{ambiguous conversion of delete expression of type 'X2' to a pointer}}
}
// PR4782
class X3 {
public:
static void operator delete(void * mem, size_t size);
};
class X4 {
public:
static void release(X3 *x);
static void operator delete(void * mem, size_t size);
};
void X4::release(X3 *x) {
delete x;
}
class X5 {
public:
void Destroy() const { delete this; }
};
class Base {
public:
static void *operator new(signed char) throw(); // expected-error {{'operator new' takes type size_t}}
static int operator new[] (size_t) throw(); // expected-error {{operator new[]' must return type 'void *'}}
};
class Tier {};
class Comp : public Tier {};
class Thai : public Base {
public:
Thai(const Tier *adoptDictionary);
};
void loadEngineFor() {
const Comp *dict;
new Thai(dict);
}
template <class T> struct TBase {
void* operator new(T size, int); // expected-error {{'operator new' cannot take a dependent type as first parameter; use size_t}}
};
TBase<int> t1;
class X6 {
public:
static void operator delete(void*, int); // expected-note {{member found by ambiguous name lookup}}
};
class X7 {
public:
static void operator delete(void*, int); // expected-note {{member found by ambiguous name lookup}}
};
class X8 : public X6, public X7 {
};
void f(X8 *x8) {
delete x8; // expected-error {{member 'operator delete' found in multiple base classes of different types}}
}
class X9 {
public:
static void operator delete(void*, int); // expected-note {{'operator delete' declared here}}
static void operator delete(void*, float); // expected-note {{'operator delete' declared here}}
};
void f(X9 *x9) {
delete x9; // expected-error {{no suitable member 'operator delete' in 'X9'}}
}
struct X10 {
virtual ~X10();
#if __cplusplus >= 201103L
// expected-note@-2 {{overridden virtual function is here}}
#endif
};
struct X11 : X10 {
#if __cplusplus <= 199711L
// expected-error@-2 {{no suitable member 'operator delete' in 'X11'}}
#else
// expected-error@-4 {{deleted function '~X11' cannot override a non-deleted function}}
// expected-note@-5 2 {{virtual destructor requires an unambiguous, accessible 'operator delete'}}
#endif
void operator delete(void*, int);
#if __cplusplus <= 199711L
// expected-note@-2 {{'operator delete' declared here}}
#endif
};
void f() {
X11 x11;
#if __cplusplus <= 199711L
// expected-note@-2 {{implicit destructor for 'X11' first required here}}
#else
// expected-error@-4 {{attempt to use a deleted function}}
#endif
}
struct X12 {
void* operator new(size_t, void*);
};
struct X13 : X12 {
using X12::operator new;
};
static void* f(void* g)
{
return new (g) X13();
}
class X14 {
public:
static void operator delete(void*, const size_t);
};
void f(X14 *x14a, X14 *x14b) {
delete x14a;
}
class X15 {
private:
X15(); // expected-note {{declared private here}}
~X15(); // expected-note {{declared private here}}
};
void f(X15* x) {
new X15(); // expected-error {{calling a private constructor}}
delete x; // expected-error {{calling a private destructor}}
}
namespace PR5918 { // Look for template operator new overloads.
struct S { template<typename T> static void* operator new(size_t, T); };
void test() {
(void)new(0) S;
}
}
namespace Test1 {
void f() {
(void)new int[10](1, 2); // precxx20-error {{array 'new' cannot have initialization arguments}}
typedef int T[10];
(void)new T(1, 2); // precxx20-error {{array 'new' cannot have initialization arguments}}
}
template<typename T>
void g(unsigned i) {
(void)new T[1](i); // precxx20-error {{array 'new' cannot have initialization arguments}}
}
template<typename T>
void h(unsigned i) {
(void)new T(i); // precxx20-error {{array 'new' cannot have initialization arguments}}
}
template void h<unsigned>(unsigned);
template void h<unsigned[10]>(unsigned); // precxx20-note {{in instantiation of function template specialization 'Test1::h<unsigned int[10]>' requested here}}
void i() {
new W[2](1, 2, 3); // precxx20-error {{array 'new' cannot have initialization arguments}}
// cxx20-error@-1 {{no viable conversion from 'int' to 'W'}}
}
}
// Don't diagnose access for overload candidates that aren't selected.
namespace PR7436 {
struct S1 {
void* operator new(size_t);
void operator delete(void* p);
private:
void* operator new(size_t, void*); // expected-note {{declared private here}}
void operator delete(void*, void*);
};
class S2 {
void* operator new(size_t); // expected-note {{declared private here}}
void operator delete(void* p); // expected-note {{declared private here}}
};
void test(S1* s1, S2* s2) {
delete s1;
delete s2; // expected-error {{is a private member}}
(void)new S1();
(void)new (0L) S1(); // expected-error {{is a private member}}
(void)new S2(); // expected-error {{is a private member}}
}
}
namespace rdar8018245 {
struct X0 {
static const int value = 17;
};
const int X0::value;
struct X1 {
static int value;
};
int X1::value;
template<typename T>
int *f() {
return new (int[T::value]); // expected-warning{{when type is in parentheses, array cannot have dynamic size}}
}
template int *f<X0>();
template int *f<X1>(); // expected-note{{in instantiation of}}
}
namespace Instantiate {
template<typename T> struct X {
operator T*();
};
void f(X<int> &xi) {
delete xi;
}
}
namespace PR7810 {
struct X {
// cv is ignored in arguments
static void operator delete(void *const);
};
struct Y {
// cv is ignored in arguments
#if __cplusplus < 202002L
static void operator delete(void *volatile);
#else
static void operator delete(void *);
#endif
};
}
// Don't crash on template delete operators
namespace TemplateDestructors {
struct S {
virtual ~S() {}
void* operator new(const size_t size);
template<class T> void* operator new(const size_t, const int, T*);
void operator delete(void*, const size_t);
template<class T> void operator delete(void*, const size_t, const int, T*);
};
}
namespace DeleteParam {
struct X {
void operator delete(X*); // expected-error{{first parameter of 'operator delete' must have type 'void *'}}
};
struct Y {
void operator delete(void* const);
};
}
// Test that the correct 'operator delete' is selected to pair with
// the unexpected placement 'operator new'.
namespace PairedDelete {
template <class T> struct A {
A();
void *operator new(size_t s, double d = 0);
void operator delete(void *p, double d);
void operator delete(void *p) {
T::dealloc(p);
}
};
A<int> *test() {
return new A<int>();
}
}
namespace PR7702 {
void test1() {
new DoesNotExist; // expected-error {{unknown type name 'DoesNotExist'}}
}
}
namespace ArrayNewNeedsDtor {
struct A { A(); private: ~A(); };
#if __cplusplus <= 199711L
// expected-note@-2 {{declared private here}}
#endif
struct B { B(); A a; };
#if __cplusplus <= 199711L
// expected-error@-2 {{field of type 'A' has private destructor}}
#else
// expected-note@-4 {{destructor of 'B' is implicitly deleted because field 'a' has an inaccessible destructor}}
#endif
B *test9() {
return new B[5];
#if __cplusplus <= 199711L
// expected-note@-2 {{implicit destructor for 'ArrayNewNeedsDtor::B' first required here}}
#else
// expected-error@-4 {{attempt to use a deleted function}}
#endif
}
}
namespace DeleteIncompleteClass {
struct A; // expected-note {{forward declaration}}
extern A x;
void f() { delete x; } // expected-error {{deleting incomplete class type}}
}
namespace DeleteIncompleteClassPointerError {
struct A; // expected-note {{forward declaration}}
void f(A *x) { 1+delete x; }
// expected-error@-1 {{invalid operands to binary expression}}
// cxx98-23-warning@-2 {{deleting pointer to incomplete type}}
// since-cxx26-error@-3 {{cannot delete pointer to incomplete type 'A'}}
}
namespace PR10504 {
struct A {
virtual void foo() = 0;
};
void f(A *x) { delete x; } // expected-warning {{delete called on 'PR10504::A' that is abstract but has non-virtual destructor}}
}
struct PlacementArg {};
inline void *operator new[](size_t, const PlacementArg &) throw () {
return 0;
}
inline void operator delete[](void *, const PlacementArg &) throw () {
}
namespace r150682 {
template <typename X>
struct S {
struct Inner {};
S() { new Inner[1]; }
};
struct T {
};
template<typename X>
void tfn() {
new (*(PlacementArg*)0) T[1]; // expected-warning 2 {{binding dereferenced null pointer to reference has undefined behavior}}
}
void fn() {
tfn<int>(); // expected-note {{in instantiation of function template specialization 'r150682::tfn<int>' requested here}}
}
}
namespace P12023 {
struct CopyCounter
{
CopyCounter();
CopyCounter(const CopyCounter&);
};
int main()
{
CopyCounter* f = new CopyCounter[10](CopyCounter()); // precxx20-error {{cannot have initialization arguments}}
return 0;
}
}
namespace PR12061 {
template <class C> struct scoped_array {
scoped_array(C* p = __null);
};
template <class Payload> struct Foo {
Foo() : a_(new scoped_array<int>[5]) { }
scoped_array< scoped_array<int> > a_;
};
class Bar {};
Foo<Bar> x;
template <class C> struct scoped_array2 {
scoped_array2(C* p = __null, C* q = __null);
};
template <class Payload> struct Foo2 {
Foo2() : a_(new scoped_array2<int>[5]) { }
scoped_array2< scoped_array2<int> > a_;
};
class Bar2 {};
Foo2<Bar2> x2;
class MessageLoop {
public:
explicit MessageLoop(int type = 0);
};
template <class CookieStoreTestTraits>
class CookieStoreTest {
protected:
CookieStoreTest() {
new MessageLoop;
}
};
struct CookieMonsterTestTraits {
};
class DeferredCookieTaskTest : public CookieStoreTest<CookieMonsterTestTraits>
{
DeferredCookieTaskTest() {}
};
}
class DeletingPlaceholder {
int* f() {
delete f; // expected-error {{reference to non-static member function must be called; did you mean to call it with no arguments?}}
return 0;
}
int* g(int, int) {
delete g; // expected-error {{reference to non-static member function must be called}}
return 0;
}
};
namespace PR18544 {
inline void *operator new(size_t); // expected-error {{'operator new' cannot be declared inside a namespace}}
}
// PR19968
inline void* operator new(); // expected-error {{'operator new' must have at least one parameter}}
namespace {
template <class C>
struct A {
void f() { this->::new; } // expected-error {{expected unqualified-id}}
void g() { this->::delete; } // expected-error {{expected unqualified-id}}
};
}
#if __cplusplus >= 201103L
template<typename ...T> int *dependent_array_size(T ...v) {
return new int[]{v...}; // expected-error {{cannot initialize}}
}
int *p0 = dependent_array_size();
int *p3 = dependent_array_size(1, 2, 3);
int *fail = dependent_array_size("hello"); // expected-note {{instantiation of}}
#endif
// FIXME: Our behavior here is incredibly inconsistent. GCC allows
// constant-folding in array bounds in new-expressions.
int (*const_fold)[12] = new int[3][&const_fold + 12 - &const_fold];
#if __cplusplus >= 201402L && !defined(NEW_INTERP)
// expected-error@-2 {{array size is not a constant expression}}
// expected-note@-3 {{cannot refer to element 12 of non-array}}
#elif __cplusplus < 201103L && !defined(NEW_INTERP)
// expected-error@-5 {{cannot allocate object of variably modified type}}
// expected-warning@-6 {{variable length arrays in C++ are a Clang extension}}
#endif
#ifdef NEW_INTERP
#if __cplusplus >= 201402L
// expected-error@-10 {{array size is not a constant expression}}
// expected-note@-11 {{cannot refer to element 12 of non-array}}
#elif __cplusplus >= 201103L
// expected-error@-13 {{only the first dimension of an allocated array may have dynamic size}}
// expected-note@-14 {{cannot refer to element 12 of non-array}}
#else
// expected-error@-16 {{only the first dimension of an allocated array may have dynamic size}}
// expected-note@-17 {{cannot refer to element 12 of non-array}}
#endif
#endif
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