forked from OSchip/llvm-project
676 lines
20 KiB
C++
676 lines
20 KiB
C++
// RUN: %clang_cc1 -analyze -analyzer-checker=alpha.cplusplus.MisusedMovedObject -std=c++11 -verify -analyzer-output=text %s
|
|
|
|
namespace std {
|
|
|
|
template <typename>
|
|
struct remove_reference;
|
|
|
|
template <typename _Tp>
|
|
struct remove_reference { typedef _Tp type; };
|
|
|
|
template <typename _Tp>
|
|
struct remove_reference<_Tp &> { typedef _Tp type; };
|
|
|
|
template <typename _Tp>
|
|
struct remove_reference<_Tp &&> { typedef _Tp type; };
|
|
|
|
template <typename _Tp>
|
|
typename remove_reference<_Tp>::type &&move(_Tp &&__t) {
|
|
return static_cast<typename remove_reference<_Tp>::type &&>(__t);
|
|
}
|
|
|
|
template <typename _Tp>
|
|
_Tp &&forward(typename remove_reference<_Tp>::type &__t) noexcept {
|
|
return static_cast<_Tp &&>(__t);
|
|
}
|
|
|
|
template <class T>
|
|
void swap(T &a, T &b) {
|
|
T c(std::move(a));
|
|
a = std::move(b);
|
|
b = std::move(c);
|
|
}
|
|
|
|
} // namespace std
|
|
|
|
class B {
|
|
public:
|
|
B() = default;
|
|
B(const B &) = default;
|
|
B(B &&) = default;
|
|
B& operator=(const B &q) = default;
|
|
void operator=(B &&b) {
|
|
return;
|
|
}
|
|
void foo() { return; }
|
|
};
|
|
|
|
class A {
|
|
int i;
|
|
double d;
|
|
|
|
public:
|
|
B b;
|
|
A(int ii = 42, double dd = 1.0) : d(dd), i(ii), b(B()) {}
|
|
void moveconstruct(A &&other) {
|
|
std::swap(b, other.b);
|
|
std::swap(d, other.d);
|
|
std::swap(i, other.i);
|
|
return;
|
|
}
|
|
static A get() {
|
|
A v(12, 13);
|
|
return v;
|
|
}
|
|
A(A *a) {
|
|
moveconstruct(std::move(*a));
|
|
}
|
|
A(const A &other) : i(other.i), d(other.d), b(other.b) {}
|
|
A(A &&other) : i(other.i), d(other.d), b(std::move(other.b)) { // expected-note {{'b' became 'moved-from' here}}
|
|
}
|
|
A(A &&other, char *k) {
|
|
moveconstruct(std::move(other));
|
|
}
|
|
void operator=(const A &other) {
|
|
i = other.i;
|
|
d = other.d;
|
|
b = other.b;
|
|
return;
|
|
}
|
|
void operator=(A &&other) {
|
|
moveconstruct(std::move(other));
|
|
return;
|
|
}
|
|
int getI() { return i; }
|
|
int foo() const;
|
|
void bar() const;
|
|
void reset();
|
|
void destroy();
|
|
void clear();
|
|
bool empty() const;
|
|
bool isEmpty() const;
|
|
operator bool() const;
|
|
};
|
|
|
|
int bignum();
|
|
|
|
void moveInsideFunctionCall(A a) {
|
|
A b = std::move(a);
|
|
}
|
|
void leftRefCall(A &a) {
|
|
a.foo();
|
|
}
|
|
void rightRefCall(A &&a) {
|
|
a.foo();
|
|
}
|
|
void constCopyOrMoveCall(const A a) {
|
|
a.foo();
|
|
}
|
|
|
|
void copyOrMoveCall(A a) {
|
|
a.foo();
|
|
}
|
|
|
|
void simpleMoveCtorTest() {
|
|
{
|
|
A a;
|
|
A b = std::move(a); // expected-note {{'a' became 'moved-from' here}}
|
|
a.foo(); // expected-warning {{Method call on a 'moved-from' object 'a'}} expected-note {{Method call on a 'moved-from' object 'a'}}
|
|
}
|
|
{
|
|
A a;
|
|
A b = std::move(a); // expected-note {{'a' became 'moved-from' here}}
|
|
b = a; // expected-warning {{Copying a 'moved-from' object 'a'}} expected-note {{Copying a 'moved-from' object 'a'}}
|
|
}
|
|
{
|
|
A a;
|
|
A b = std::move(a); // expected-note {{'a' became 'moved-from' here}}
|
|
b = std::move(a); // expected-warning {{Moving a 'moved-from' object 'a'}} expected-note {{Moving a 'moved-from' object 'a'}}
|
|
}
|
|
}
|
|
|
|
void simpleMoveAssignementTest() {
|
|
{
|
|
A a;
|
|
A b;
|
|
b = std::move(a); // expected-note {{'a' became 'moved-from' here}}
|
|
a.foo(); // expected-warning {{Method call on a 'moved-from' object 'a'}} expected-note {{Method call on a 'moved-from' object 'a'}}
|
|
}
|
|
{
|
|
A a;
|
|
A b;
|
|
b = std::move(a); // expected-note {{'a' became 'moved-from' here}}
|
|
A c(a); // expected-warning {{Copying a 'moved-from' object 'a'}} expected-note {{Copying a 'moved-from' object 'a'}}
|
|
}
|
|
{
|
|
A a;
|
|
A b;
|
|
b = std::move(a); // expected-note {{'a' became 'moved-from' here}}
|
|
A c(std::move(a)); // expected-warning {{Moving a 'moved-from' object 'a'}} expected-note {{Moving a 'moved-from' object 'a'}}
|
|
}
|
|
}
|
|
|
|
void moveInInitListTest() {
|
|
struct S {
|
|
A a;
|
|
};
|
|
A a;
|
|
S s{std::move(a)}; // expected-note {{'a' became 'moved-from' here}}
|
|
a.foo(); // expected-warning {{Method call on a 'moved-from' object 'a'}} expected-note {{Method call on a 'moved-from' object 'a'}}
|
|
}
|
|
|
|
// Don't report a bug if the variable was assigned to in the meantime.
|
|
void reinitializationTest(int i) {
|
|
{
|
|
A a;
|
|
A b;
|
|
b = std::move(a);
|
|
a = A();
|
|
a.foo();
|
|
}
|
|
{
|
|
A a;
|
|
if (i == 1) { // expected-note {{Assuming 'i' is not equal to 1}} expected-note {{Taking false branch}}
|
|
// expected-note@-1 {{Assuming 'i' is not equal to 1}} expected-note@-1 {{Taking false branch}}
|
|
A b;
|
|
b = std::move(a);
|
|
a = A();
|
|
}
|
|
if (i == 2) { // expected-note {{Assuming 'i' is not equal to 2}} expected-note {{Taking false branch}}
|
|
//expected-note@-1 {{Assuming 'i' is not equal to 2}} expected-note@-1 {{Taking false branch}}
|
|
a.foo(); // no-warning
|
|
}
|
|
}
|
|
{
|
|
A a;
|
|
if (i == 1) { // expected-note {{Taking false branch}} expected-note {{Taking false branch}}
|
|
std::move(a);
|
|
}
|
|
if (i == 2) { // expected-note {{Taking false branch}} expected-note {{Taking false branch}}
|
|
a = A();
|
|
a.foo();
|
|
}
|
|
}
|
|
// The built-in assignment operator should also be recognized as a
|
|
// reinitialization. (std::move() may be called on built-in types in template
|
|
// code.)
|
|
{
|
|
int a1 = 1, a2 = 2;
|
|
std::swap(a1, a2);
|
|
}
|
|
// A std::move() after the assignment makes the variable invalid again.
|
|
{
|
|
A a;
|
|
A b;
|
|
b = std::move(a);
|
|
a = A();
|
|
b = std::move(a); // expected-note {{'a' became 'moved-from' here}}
|
|
a.foo(); // expected-warning {{Method call on a 'moved-from' object 'a'}} expected-note {{Method call on a 'moved-from' object 'a'}}
|
|
}
|
|
// If a path exist where we not reinitialize the variable we report a bug.
|
|
{
|
|
A a;
|
|
A b;
|
|
b = std::move(a); // expected-note {{'a' became 'moved-from' here}}
|
|
if (i < 10) { // expected-note {{Assuming 'i' is >= 10}} expected-note {{Taking false branch}}
|
|
a = A();
|
|
}
|
|
if (i > 5) { // expected-note {{Taking true branch}}
|
|
a.foo(); // expected-warning {{Method call on a 'moved-from' object 'a'}} expected-note {{Method call on a 'moved-from' object 'a'}}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Using decltype on an expression is not a use.
|
|
void decltypeIsNotUseTest() {
|
|
A a;
|
|
// A b(std::move(a));
|
|
decltype(a) other_a; // no-warning
|
|
}
|
|
|
|
void loopTest() {
|
|
{
|
|
A a;
|
|
for (int i = 0; i < bignum(); i++) { // expected-note {{Loop condition is false. Execution jumps to the end of the function}}
|
|
rightRefCall(std::move(a)); // no-warning
|
|
}
|
|
}
|
|
{
|
|
A a;
|
|
for (int i = 0; i < 2; i++) { // expected-note {{Loop condition is true. Entering loop body}}
|
|
//expected-note@-1 {{Loop condition is true. Entering loop body}}
|
|
//expected-note@-2 {{Loop condition is false. Execution jumps to the end of the function}}
|
|
rightRefCall(std::move(a)); // no-warning
|
|
}
|
|
}
|
|
{
|
|
A a;
|
|
for (int i = 0; i < bignum(); i++) { // expected-note {{Loop condition is false. Execution jumps to the end of the function}}
|
|
leftRefCall(a); // no-warning
|
|
}
|
|
}
|
|
{
|
|
A a;
|
|
for (int i = 0; i < 2; i++) { // expected-note {{Loop condition is true. Entering loop body}}
|
|
//expected-note@-1 {{Loop condition is true. Entering loop body}}
|
|
//expected-note@-2 {{Loop condition is false. Execution jumps to the end of the function}}
|
|
leftRefCall(a); // no-warning
|
|
}
|
|
}
|
|
{
|
|
A a;
|
|
for (int i = 0; i < bignum(); i++) { // expected-note {{Loop condition is false. Execution jumps to the end of the function}}
|
|
constCopyOrMoveCall(a); // no-warning
|
|
}
|
|
}
|
|
{
|
|
A a;
|
|
for (int i = 0; i < 2; i++) { // expected-note {{Loop condition is true. Entering loop body}}
|
|
//expected-note@-1 {{Loop condition is true. Entering loop body}}
|
|
//expected-note@-2 {{Loop condition is false. Execution jumps to the end of the function}}
|
|
constCopyOrMoveCall(a); // no-warning
|
|
}
|
|
}
|
|
{
|
|
A a;
|
|
for (int i = 0; i < bignum(); i++) { // expected-note {{Loop condition is false. Execution jumps to the end of the function}}
|
|
moveInsideFunctionCall(a); // no-warning
|
|
}
|
|
}
|
|
{
|
|
A a;
|
|
for (int i = 0; i < 2; i++) { // expected-note {{Loop condition is true. Entering loop body}}
|
|
//expected-note@-1 {{Loop condition is true. Entering loop body}}
|
|
//expected-note@-2 {{Loop condition is false. Execution jumps to the end of the function}}
|
|
moveInsideFunctionCall(a); // no-warning
|
|
}
|
|
}
|
|
{
|
|
A a;
|
|
for (int i = 0; i < bignum(); i++) { // expected-note {{Loop condition is false. Execution jumps to the end of the function}}
|
|
copyOrMoveCall(a); // no-warning
|
|
}
|
|
}
|
|
{
|
|
A a;
|
|
for (int i = 0; i < 2; i++) { // expected-note {{Loop condition is true.}}
|
|
//expected-note@-1 {{Loop condition is true. Entering loop body}}
|
|
//expected-note@-2 {{Loop condition is false. Execution jumps to the end of the function}}
|
|
copyOrMoveCall(a); // no-warning
|
|
}
|
|
}
|
|
{
|
|
A a;
|
|
for (int i = 0; i < bignum(); i++) { // expected-note {{Loop condition is true. Entering loop body}} expected-note {{Loop condition is true. Entering loop body}}
|
|
constCopyOrMoveCall(std::move(a)); // expected-warning {{Moving a 'moved-from' object 'a'}} expected-note {{Moving a 'moved-from' object 'a'}}
|
|
// expected-note@-1 {{'a' became 'moved-from' here}}
|
|
}
|
|
}
|
|
|
|
// Don't warn if we return after the move.
|
|
{
|
|
A a;
|
|
for (int i = 0; i < 3; ++i) {
|
|
a.bar();
|
|
if (a.foo() > 0) {
|
|
A b;
|
|
b = std::move(a); // no-warning
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//report a usage of a moved-from object only at the first use
|
|
void uniqueTest(bool cond) {
|
|
A a(42, 42.0);
|
|
A b;
|
|
b = std::move(a); // expected-note {{'a' became 'moved-from' here}}
|
|
|
|
if (cond) { // expected-note {{Assuming 'cond' is not equal to 0}} expected-note {{Taking true branch}}
|
|
a.foo(); // expected-warning {{Method call on a 'moved-from' object 'a'}} expected-note {{Method call on a 'moved-from' object 'a'}}
|
|
}
|
|
if (cond) {
|
|
a.bar(); // no-warning
|
|
}
|
|
|
|
a.bar(); // no-warning
|
|
}
|
|
|
|
void uniqueTest2() {
|
|
A a;
|
|
A a1 = std::move(a); // expected-note {{'a' became 'moved-from' here}}
|
|
a.foo(); // expected-warning {{Method call on a 'moved-from' object 'a'}} expected-note {{Method call on a 'moved-from' object 'a'}}
|
|
|
|
A a2 = std::move(a); // no-warning
|
|
a.foo(); // no-warning
|
|
}
|
|
|
|
// There are exceptions where we assume in general that the method works fine
|
|
//even on moved-from objects.
|
|
void moveSafeFunctionsTest() {
|
|
A a;
|
|
A b = std::move(a); // expected-note {{'a' became 'moved-from' here}}
|
|
a.empty(); // no-warning
|
|
a.isEmpty(); // no-warning
|
|
(void)a; // no-warning
|
|
(bool)a; // expected-warning {{expression result unused}}
|
|
a.foo(); // expected-warning {{Method call on a 'moved-from' object 'a'}} expected-note {{Method call on a 'moved-from' object 'a'}}
|
|
}
|
|
|
|
void moveStateResetFunctionsTest() {
|
|
{
|
|
A a;
|
|
A b = std::move(a);
|
|
a.reset(); // no-warning
|
|
a.foo(); // no-warning
|
|
// Test if resets the state of subregions as well.
|
|
a.b.foo(); // no-warning
|
|
}
|
|
{
|
|
A a;
|
|
A b = std::move(a);
|
|
a.destroy(); // no-warning
|
|
a.foo(); // no-warning
|
|
}
|
|
{
|
|
A a;
|
|
A b = std::move(a);
|
|
a.clear(); // no-warning
|
|
a.foo(); // no-warning
|
|
a.b.foo(); // no-warning
|
|
}
|
|
}
|
|
|
|
// Moves or uses that occur as part of template arguments.
|
|
template <int>
|
|
class ClassTemplate {
|
|
public:
|
|
void foo(A a);
|
|
};
|
|
|
|
template <int>
|
|
void functionTemplate(A a);
|
|
|
|
void templateArgIsNotUseTest() {
|
|
{
|
|
// A pattern like this occurs in the EXPECT_EQ and ASSERT_EQ macros in
|
|
// Google Test.
|
|
A a;
|
|
ClassTemplate<sizeof(A(std::move(a)))>().foo(std::move(a)); // no-warning
|
|
}
|
|
{
|
|
A a;
|
|
functionTemplate<sizeof(A(std::move(a)))>(std::move(a)); // no-warning
|
|
}
|
|
}
|
|
|
|
// Moves of global variables are not reported.
|
|
A global_a;
|
|
void globalVariablesTest() {
|
|
std::move(global_a);
|
|
global_a.foo(); // no-warning
|
|
}
|
|
|
|
// Moves of member variables.
|
|
class memberVariablesTest {
|
|
A a;
|
|
static A static_a;
|
|
|
|
void f() {
|
|
A b;
|
|
b = std::move(a); // expected-note {{'a' became 'moved-from' here}}
|
|
a.foo(); // expected-warning {{Method call on a 'moved-from' object}} expected-note {{Method call on a 'moved-from' object 'a'}}
|
|
|
|
b = std::move(static_a); // expected-note {{'static_a' became 'moved-from' here}}
|
|
static_a.foo(); // expected-warning {{Method call on a 'moved-from' object 'static_a'}} expected-note {{Method call on a 'moved-from' object 'static_a'}}
|
|
}
|
|
};
|
|
|
|
void PtrAndArrayTest() {
|
|
A *Ptr = new A(1, 1.5);
|
|
A Arr[10];
|
|
Arr[2] = std::move(*Ptr); // expected-note {{Became 'moved-from' here}}
|
|
(*Ptr).foo(); // expected-warning {{Method call on a 'moved-from' object}} expected-note {{Method call on a 'moved-from' object}}
|
|
|
|
Ptr = &Arr[1];
|
|
Arr[3] = std::move(Arr[1]); // expected-note {{Became 'moved-from' here}}
|
|
Ptr->foo(); // expected-warning {{Method call on a 'moved-from' object}} expected-note {{Method call on a 'moved-from' object}}
|
|
|
|
Arr[3] = std::move(Arr[2]); // expected-note {{Became 'moved-from' here}}
|
|
Arr[2].foo(); // expected-warning {{Method call on a 'moved-from' object}} expected-note {{Method call on a 'moved-from' object}}
|
|
|
|
Arr[2] = std::move(Arr[3]); // reinitialization
|
|
Arr[2].foo(); // no-warning
|
|
}
|
|
|
|
void exclusiveConditionsTest(bool cond) {
|
|
A a;
|
|
if (cond) {
|
|
A b;
|
|
b = std::move(a);
|
|
}
|
|
if (!cond) {
|
|
a.bar(); // no-warning
|
|
}
|
|
}
|
|
|
|
void differentBranchesTest(int i) {
|
|
// Don't warn if the use is in a different branch from the move.
|
|
{
|
|
A a;
|
|
if (i > 0) { // expected-note {{Assuming 'i' is > 0}} expected-note {{Taking true branch}}
|
|
A b;
|
|
b = std::move(a);
|
|
} else {
|
|
a.foo(); // no-warning
|
|
}
|
|
}
|
|
// Same thing, but with a ternary operator.
|
|
{
|
|
A a, b;
|
|
i > 0 ? (void)(b = std::move(a)) : a.bar(); // no-warning // expected-note {{'?' condition is true}}
|
|
}
|
|
// A variation on the theme above.
|
|
{
|
|
A a;
|
|
a.foo() > 0 ? a.foo() : A(std::move(a)).foo(); // expected-note {{Assuming the condition is false}} expected-note {{'?' condition is false}}
|
|
}
|
|
// Same thing, but with a switch statement.
|
|
{
|
|
A a, b;
|
|
switch (i) { // expected-note {{Control jumps to 'case 1:' at line 483}}
|
|
case 1:
|
|
b = std::move(a); // no-warning
|
|
break; // expected-note {{Execution jumps to the end of the function}}
|
|
case 2:
|
|
a.foo(); // no-warning
|
|
break;
|
|
}
|
|
}
|
|
// However, if there's a fallthrough, we do warn.
|
|
{
|
|
A a, b;
|
|
switch (i) { // expected-note {{Control jumps to 'case 1:' at line 495}}
|
|
case 1:
|
|
b = std::move(a); // expected-note {{'a' became 'moved-from' here}}
|
|
case 2:
|
|
a.foo(); // expected-warning {{Method call on a 'moved-from' object}} expected-note {{Method call on a 'moved-from' object 'a'}}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void tempTest() {
|
|
A a = A::get();
|
|
A::get().foo(); // no-warning
|
|
for (int i = 0; i < bignum(); i++) {
|
|
A::get().foo(); // no-warning
|
|
}
|
|
}
|
|
|
|
void interFunTest1(A &a) {
|
|
a.bar(); // expected-warning {{Method call on a 'moved-from' object 'a'}} expected-note {{Method call on a 'moved-from' object 'a'}}
|
|
}
|
|
|
|
void interFunTest2() {
|
|
A a;
|
|
A b;
|
|
b = std::move(a); // expected-note {{'a' became 'moved-from' here}}
|
|
interFunTest1(a); // expected-note {{Calling 'interFunTest1'}}
|
|
}
|
|
|
|
void foobar(A a, int i);
|
|
void foobar(int i, A a);
|
|
|
|
void paramEvaluateOrderTest() {
|
|
A a;
|
|
foobar(std::move(a), a.getI()); // expected-warning {{Method call on a 'moved-from' object 'a'}} expected-note {{Method call on a 'moved-from' object 'a'}}
|
|
// expected-note@-1 {{'a' became 'moved-from' here}}
|
|
|
|
//FALSE NEGATIVE since parameters evaluate order is undefined
|
|
foobar(a.getI(), std::move(a)); //no-warning
|
|
}
|
|
|
|
void not_known(A &a);
|
|
void not_known(A *a);
|
|
|
|
void regionAndPointerEscapeTest() {
|
|
{
|
|
A a;
|
|
A b;
|
|
b = std::move(a);
|
|
not_known(a);
|
|
a.foo(); //no-warning
|
|
}
|
|
{
|
|
A a;
|
|
A b;
|
|
b = std::move(a);
|
|
not_known(&a);
|
|
a.foo(); // no-warning
|
|
}
|
|
}
|
|
|
|
// A declaration statement containing multiple declarations sequences the
|
|
// initializer expressions.
|
|
void declarationSequenceTest() {
|
|
{
|
|
A a;
|
|
A a1 = a, a2 = std::move(a); // no-warning
|
|
}
|
|
{
|
|
A a;
|
|
A a1 = std::move(a), a2 = a; // expected-warning {{Copying a 'moved-from' object 'a'}} expected-note {{Copying a 'moved-from' object 'a'}}
|
|
// expected-note@-1 {{'a' became 'moved-from' here}}
|
|
}
|
|
}
|
|
|
|
// The logical operators && and || sequence their operands.
|
|
void logicalOperatorsSequenceTest() {
|
|
{
|
|
A a;
|
|
if (a.foo() > 0 && A(std::move(a)).foo() > 0) { // expected-note {{Assuming the condition is false}} expected-note {{Assuming the condition is false}}
|
|
// expected-note@-1 {{Left side of '&&' is false}} expected-note@-1 {{Left side of '&&' is false}}
|
|
//expected-note@-2 {{Taking false branch}} expected-note@-2 {{Taking false branch}}
|
|
A().bar();
|
|
}
|
|
}
|
|
// A variation: Negate the result of the && (which pushes the && further down
|
|
// into the AST).
|
|
{
|
|
A a;
|
|
if (!(a.foo() > 0 && A(std::move(a)).foo() > 0)) { // expected-note {{Assuming the condition is false}} expected-note {{Assuming the condition is false}}
|
|
// expected-note@-1 {{Left side of '&&' is false}} expected-note@-1 {{Left side of '&&' is false}}
|
|
// expected-note@-2 {{Taking true branch}} expected-note@-2 {{Taking true branch}}
|
|
A().bar();
|
|
}
|
|
}
|
|
{
|
|
A a;
|
|
if (A(std::move(a)).foo() > 0 && a.foo() > 0) { // expected-warning {{Method call on a 'moved-from' object 'a'}} expected-note {{Method call on a 'moved-from' object 'a'}}
|
|
// expected-note@-1 {{'a' became 'moved-from' here}} expected-note@-1 {{Assuming the condition is true}} expected-note@-1 {{Assuming the condition is false}}
|
|
// expected-note@-2 {{Left side of '&&' is false}} expected-note@-2 {{Left side of '&&' is true}}
|
|
// expected-note@-3 {{Taking false branch}}
|
|
A().bar();
|
|
}
|
|
}
|
|
{
|
|
A a;
|
|
if (a.foo() > 0 || A(std::move(a)).foo() > 0) { // expected-note {{Assuming the condition is true}}
|
|
//expected-note@-1 {{Left side of '||' is true}}
|
|
//expected-note@-2 {{Taking true branch}}
|
|
A().bar();
|
|
}
|
|
}
|
|
{
|
|
A a;
|
|
if (A(std::move(a)).foo() > 0 || a.foo() > 0) { // expected-warning {{Method call on a 'moved-from' object 'a'}} expected-note {{Method call on a 'moved-from' object 'a'}}
|
|
// expected-note@-1 {{'a' became 'moved-from' here}} expected-note@-1 {{Assuming the condition is false}} expected-note@-1 {{Left side of '||' is false}}
|
|
A().bar();
|
|
}
|
|
}
|
|
}
|
|
|
|
// A range-based for sequences the loop variable declaration before the body.
|
|
void forRangeSequencesTest() {
|
|
A v[2] = {A(), A()};
|
|
for (A &a : v) {
|
|
A b;
|
|
b = std::move(a); // no-warning
|
|
}
|
|
}
|
|
|
|
// If a variable is declared in an if statement, the declaration of the variable
|
|
// (which is treated like a reinitialization by the check) is sequenced before
|
|
// the evaluation of the condition (which constitutes a use).
|
|
void ifStmtSequencesDeclAndConditionTest() {
|
|
for (int i = 0; i < 3; ++i) {
|
|
if (A a = A()) {
|
|
A b;
|
|
b = std::move(a); // no-warning
|
|
}
|
|
}
|
|
}
|
|
|
|
class C : public A {};
|
|
void subRegionMoveTest() {
|
|
{
|
|
A a;
|
|
B b = std::move(a.b); // expected-note {{'b' became 'moved-from' here}}
|
|
a.b.foo(); // expected-warning {{Method call on a 'moved-from' object 'b'}} expected-note {{Method call on a 'moved-from' object 'b'}}
|
|
}
|
|
{
|
|
A a;
|
|
A a1 = std::move(a); // expected-note {{Calling move constructor for 'A'}} expected-note {{Returning from move constructor for 'A'}}
|
|
a.b.foo(); // expected-warning {{Method call on a 'moved-from' object 'b'}} expected-note {{Method call on a 'moved-from' object 'b'}}
|
|
}
|
|
// Don't report a misuse if any SuperRegion is already reported.
|
|
{
|
|
A a;
|
|
A a1 = std::move(a); // expected-note {{'a' became 'moved-from' here}}
|
|
a.foo(); // expected-warning {{Method call on a 'moved-from' object 'a'}} expected-note {{Method call on a 'moved-from' object 'a'}}
|
|
a.b.foo(); // no-warning
|
|
}
|
|
{
|
|
C c;
|
|
C c1 = std::move(c); // expected-note {{'c' became 'moved-from' here}}
|
|
c.foo(); // expected-warning {{Method call on a 'moved-from' object 'c'}} expected-note {{Method call on a 'moved-from' object 'c'}}
|
|
c.b.foo(); // no-warning
|
|
}
|
|
}
|
|
|
|
void resetSuperClass() {
|
|
C c;
|
|
C c1 = std::move(c);
|
|
c.clear();
|
|
C c2 = c; // no-warning
|
|
}
|
|
|
|
void reportSuperClass() {
|
|
C c;
|
|
C c1 = std::move(c); // expected-note {{'c' became 'moved-from' here}}
|
|
c.foo(); // expected-warning {{Method call on a 'moved-from' object 'c'}} expected-note {{Method call on a 'moved-from' object 'c'}}
|
|
C c2 = c; // no-warning
|
|
}
|