// RUN: %clang_cc1 -fsyntax-only -Wall -Wuninitialized -Wno-unused-value -Wno-unused-lambda-capture -Wno-uninitialized-const-reference -std=c++1z -verify %s
// RUN: %clang_cc1 -fsyntax-only -Wall -Wuninitialized -Wno-unused-value -Wno-unused-lambda-capture -Wno-uninitialized-const-reference -std=c++1z -verify %s -fexperimental-new-constant-interpreter
// definitions for std::move
namespace std {
inline namespace foo {
template <class T> struct remove_reference { typedef T type; };
template <class T> struct remove_reference<T&> { typedef T type; };
template <class T> struct remove_reference<T&&> { typedef T type; };
template <class T> typename remove_reference<T>::type&& move(T&& t);
}
}
int foo(int x);
int bar(int* x);
int boo(int& x);
int far(const int& x);
int moved(int&& x);
int &ref(int x);
// Test self-references within initializers which are guaranteed to be
// uninitialized.
int a = a; // no-warning: used to signal intended lack of initialization.
int b = b + 1; // expected-warning {{variable 'b' is uninitialized when used within its own initialization}}
int c = (c + c); // expected-warning 2 {{variable 'c' is uninitialized when used within its own initialization}}
int e = static_cast<long>(e) + 1; // expected-warning {{variable 'e' is uninitialized when used within its own initialization}}
int f = foo(f); // expected-warning {{variable 'f' is uninitialized when used within its own initialization}}
// These don't warn as they don't require the value.
int g = sizeof(g);
void* ptr = &ptr;
int h = bar(&h);
int i = boo(i);
int j = far(j);
int k = __alignof__(k);
int l = k ? l : l; // expected-warning 2{{variable 'l' is uninitialized when used within its own initialization}}
int m = 1 + (k ? m : m); // expected-warning 2{{variable 'm' is uninitialized when used within its own initialization}}
int n = -n; // expected-warning {{variable 'n' is uninitialized when used within its own initialization}}
int o = std::move(o); // expected-warning {{variable 'o' is uninitialized when used within its own initialization}}
const int p = std::move(p); // expected-warning {{variable 'p' is uninitialized when used within its own initialization}}
int q = moved(std::move(q)); // expected-warning {{variable 'q' is uninitialized when used within its own initialization}}
int r = std::move((p ? q : (18, r))); // expected-warning {{variable 'r' is uninitialized when used within its own initialization}}
int s = r ?: s; // expected-warning {{variable 's' is uninitialized when used within its own initialization}}
int t = t ?: s; // expected-warning {{variable 't' is uninitialized when used within its own initialization}}
int u = (foo(u), s); // expected-warning {{variable 'u' is uninitialized when used within its own initialization}}
int v = (u += v); // expected-warning {{variable 'v' is uninitialized when used within its own initialization}}
int w = (w += 10); // expected-warning {{variable 'w' is uninitialized when used within its own initialization}}
int x = x++; // expected-warning {{variable 'x' is uninitialized when used within its own initialization}}
int y = ((s ? (y, v) : (77, y))++, sizeof(y)); // expected-warning {{variable 'y' is uninitialized when used within its own initialization}}
int z = ++ref(z); // expected-warning {{variable 'z' is uninitialized when used within its own initialization}}
int aa = (ref(aa) += 10); // expected-warning {{variable 'aa' is uninitialized when used within its own initialization}}
int bb = bb ? x : y; // expected-warning {{variable 'bb' is uninitialized when used within its own initialization}}
void test_stuff () {
int a = a; // no-warning: used to signal intended lack of initialization.
int b = b + 1; // expected-warning {{variable 'b' is uninitialized when used within its own initialization}}
int c = (c + c); // expected-warning {{variable 'c' is uninitialized when used within its own initialization}}
int d = ({ d + d ;}); // expected-warning {{variable 'd' is uninitialized when used within its own initialization}}
int e = static_cast<long>(e) + 1; // expected-warning {{variable 'e' is uninitialized when used within its own initialization}}
int f = foo(f); // expected-warning {{variable 'f' is uninitialized when used within its own initialization}}
// These don't warn as they don't require the value.
int g = sizeof(g);
void* ptr = &ptr;
int h = bar(&h);
int i = boo(i);
int j = far(j);
int k = __alignof__(k);
int l = k ? l : l; // expected-warning {{variable 'l' is uninitialized when used within its own initialization}}
int m = 1 + (k ? m : m); // expected-warning {{'m' is uninitialized when used within its own initialization}}
int n = -n; // expected-warning {{variable 'n' is uninitialized when used within its own initialization}}
int o = std::move(o); // expected-warning {{variable 'o' is uninitialized when used within its own initialization}}
const int p = std::move(p); // expected-warning {{variable 'p' is uninitialized when used within its own initialization}}
int q = moved(std::move(q)); // expected-warning {{variable 'q' is uninitialized when used within its own initialization}}
int r = std::move((p ? q : (18, r))); // expected-warning {{variable 'r' is uninitialized when used within its own initialization}}
int s = r ?: s; // expected-warning {{variable 's' is uninitialized when used within its own initialization}}
int t = t ?: s; // expected-warning {{variable 't' is uninitialized when used within its own initialization}}
int u = (foo(u), s); // expected-warning {{variable 'u' is uninitialized when used within its own initialization}}
int v = (u += v); // expected-warning {{variable 'v' is uninitialized when used within its own initialization}}
int w = (w += 10); // expected-warning {{variable 'w' is uninitialized when used within its own initialization}}
int x = x++; // expected-warning {{variable 'x' is uninitialized when used within its own initialization}}
int y = ((s ? (y, v) : (77, y))++, sizeof(y)); // expected-warning {{variable 'y' is uninitialized when used within its own initialization}}
int z = ++ref(z); // expected-warning {{variable 'z' is uninitialized when used within its own initialization}}
int aa = (ref(aa) += 10); // expected-warning {{variable 'aa' is uninitialized when used within its own initialization}}
int bb = bb ? x : y; // expected-warning {{variable 'bb' is uninitialized when used within its own initialization}}
for (;;) {
int a = a; // no-warning: used to signal intended lack of initialization.
int b = b + 1; // expected-warning {{variable 'b' is uninitialized when used within its own initialization}}
int c = (c + c); // expected-warning {{variable 'c' is uninitialized when used within its own initialization}}
int d = ({ d + d ;}); // expected-warning {{variable 'd' is uninitialized when used within its own initialization}}
int e = static_cast<long>(e) + 1; // expected-warning {{variable 'e' is uninitialized when used within its own initialization}}
int f = foo(f); // expected-warning {{variable 'f' is uninitialized when used within its own initialization}}
// These don't warn as they don't require the value.
int g = sizeof(g);
void* ptr = &ptr;
int h = bar(&h);
int i = boo(i);
int j = far(j);
int k = __alignof__(k);
int l = k ? l : l; // expected-warning {{variable 'l' is uninitialized when used within its own initialization}}
int m = 1 + (k ? m : m); // expected-warning {{'m' is uninitialized when used within its own initialization}}
int n = -n; // expected-warning {{variable 'n' is uninitialized when used within its own initialization}}
int o = std::move(o); // expected-warning {{variable 'o' is uninitialized when used within its own initialization}}
const int p = std::move(p); // expected-warning {{variable 'p' is uninitialized when used within its own initialization}}
int q = moved(std::move(q)); // expected-warning {{variable 'q' is uninitialized when used within its own initialization}}
int r = std::move((p ? q : (18, r))); // expected-warning {{variable 'r' is uninitialized when used within its own initialization}}
int s = r ?: s; // expected-warning {{variable 's' is uninitialized when used within its own initialization}}
int t = t ?: s; // expected-warning {{variable 't' is uninitialized when used within its own initialization}}
int u = (foo(u), s); // expected-warning {{variable 'u' is uninitialized when used within its own initialization}}
int v = (u += v); // expected-warning {{variable 'v' is uninitialized when used within its own initialization}}
int w = (w += 10); // expected-warning {{variable 'w' is uninitialized when used within its own initialization}}
int x = x++; // expected-warning {{variable 'x' is uninitialized when used within its own initialization}}
int y = ((s ? (y, v) : (77, y))++, sizeof(y)); // expected-warning {{variable 'y' is uninitialized when used within its own initialization}}
int z = ++ref(z); // expected-warning {{variable 'z' is uninitialized when used within its own initialization}}
int aa = (ref(aa) += 10); // expected-warning {{variable 'aa' is uninitialized when used within its own initialization}}
int bb = bb ? x : y; // expected-warning {{variable 'bb' is uninitialized when used within its own initialization}}
}
}
void test_comma() {
int a; // expected-note {{initialize the variable 'a' to silence this warning}}
int b = (a, a ?: 2); // expected-warning {{variable 'a' is uninitialized when used here}}
int c = (a, a, b, c); // expected-warning {{variable 'c' is uninitialized when used within its own initialization}}
int d; // expected-note {{initialize the variable 'd' to silence this warning}}
int e = (foo(d), e, b); // expected-warning {{variable 'd' is uninitialized when used here}}
int f; // expected-note {{initialize the variable 'f' to silence this warning}}
f = f + 1, 2; // expected-warning {{variable 'f' is uninitialized when used here}}
int h;
int g = (h, g, 2); // no-warning: h, g are evaluated but not used.
}
namespace member_ptr {
struct A {
int x;
int y;
A(int x) : x{x} {}
};
void test_member_ptr() {
int A::* px = &A::x;
A a{a.*px}; // expected-warning {{variable 'a' is uninitialized when used within its own initialization}}
A b = b; // expected-warning {{variable 'b' is uninitialized when used within its own initialization}}
}
}
namespace const_ptr {
void foo(int *a);
void bar(const int *a);
void foobar(const int **a);
void test_const_ptr() {
int a;
int b; // expected-note {{initialize the variable 'b' to silence this warning}}
foo(&a);
bar(&b);
b = a + b; // expected-warning {{variable 'b' is uninitialized when used here}}
int *ptr; //expected-note {{initialize the variable 'ptr' to silence this warning}}
const int *ptr2;
foo(ptr); // expected-warning {{variable 'ptr' is uninitialized when used here}}
foobar(&ptr2);
}
}
// Also test similar constructs in a field's initializer.
struct S {
int x;
int y;
const int z = 5;
void *ptr;
S(bool (*)[1]) : x(x) {} // expected-warning {{field 'x' is uninitialized when used here}}
S(bool (*)[2]) : x(x + 1) {} // expected-warning {{field 'x' is uninitialized when used here}}
S(bool (*)[3]) : x(x + x) {} // expected-warning 2{{field 'x' is uninitialized when used here}}
S(bool (*)[4]) : x(static_cast<long>(x) + 1) {} // expected-warning {{field 'x' is uninitialized when used here}}
S(bool (*)[5]) : x(foo(x)) {} // expected-warning {{field 'x' is uninitialized when used here}}
// These don't actually require the value of x and so shouldn't warn.
S(char (*)[1]) : x(sizeof(x)) {}
S(char (*)[2]) : ptr(&ptr) {}
S(char (*)[3]) : x(bar(&x)) {}
S(char (*)[4]) : x(boo(x)) {}
S(char (*)[5]) : x(far(x)) {}
S(char (*)[6]) : x(__alignof__(x)) {}
S(int (*)[1]) : x(0), y(x ? y : y) {} // expected-warning 2{{field 'y' is uninitialized when used here}}
S(int (*)[2]) : x(0), y(1 + (x ? y : y)) {} // expected-warning 2{{field 'y' is uninitialized when used here}}
S(int (*)[3]) : x(-x) {} // expected-warning {{field 'x' is uninitialized when used here}}
S(int (*)[4]) : x(std::move(x)) {} // expected-warning {{field 'x' is uninitialized when used here}}
S(int (*)[5]) : z(std::move(z)) {} // expected-warning {{field 'z' is uninitialized when used here}}
S(int (*)[6]) : x(moved(std::move(x))) {} // expected-warning {{field 'x' is uninitialized when used here}}
S(int (*)[7]) : x(0), y(std::move((x ? x : (18, y)))) {} // expected-warning {{field 'y' is uninitialized when used here}}
S(int (*)[8]) : x(0), y(x ?: y) {} // expected-warning {{field 'y' is uninitialized when used here}}
S(int (*)[9]) : x(0), y(y ?: x) {} // expected-warning {{field 'y' is uninitialized when used here}}
S(int (*)[10]) : x(0), y((foo(y), x)) {} // expected-warning {{field 'y' is uninitialized when used here}}
S(int (*)[11]) : x(0), y(x += y) {} // expected-warning {{field 'y' is uninitialized when used here}}
S(int (*)[12]) : x(x += 10) {} // expected-warning {{field 'x' is uninitialized when used here}}
S(int (*)[13]) : x(x++) {} // expected-warning {{field 'x' is uninitialized when used here}}
S(int (*)[14]) : x(0), y(((x ? (y, x) : (77, y))++, sizeof(y))) {} // expected-warning {{field 'y' is uninitialized when used here}}
S(int (*)[15]) : x(++ref(x)) {} // expected-warning {{field 'x' is uninitialized when used here}}
S(int (*)[16]) : x((ref(x) += 10)) {} // expected-warning {{field 'x' is uninitialized when used here}}
S(int (*)[17]) : x(0), y(y ? x : x) {} // expected-warning {{field 'y' is uninitialized when used here}}
};
// Test self-references with record types.
class A {
// Non-POD class.
public:
enum count { ONE, TWO, THREE };
int num;
static int count;
int get() const { return num; }
int get2() { return num; }
int set(int x) { num = x; return num; }
static int zero() { return 0; }
A() {}
A(A const &a) {}
A(int x) {}
A(int *x) {}
A(A *a) {}
A(A &&a) {}
~A();
bool operator!();
bool operator!=(const A&);
};
bool operator!=(int, const A&);
A getA() { return A(); }
A getA(int x) { return A(); }
A getA(A* a) { return A(); }
A getA(A a) { return A(); }
A moveA(A&& a) { return A(); }
A const_refA(const A& a) { return A(); }
void setupA(bool x) {
A a1;
a1.set(a1.get());
A a2(a1.get());
A a3(a1);
A a4(&a4);
A a5(a5.zero());
A a6(a6.ONE);
A a7 = getA();
A a8 = getA(a8.TWO);
A a9 = getA(&a9);
A a10(a10.count);
A a11(a11); // expected-warning {{variable 'a11' is uninitialized when used within its own initialization}}
A a12(a12.get()); // expected-warning {{variable 'a12' is uninitialized when used within its own initialization}}
A a13(a13.num); // expected-warning {{variable 'a13' is uninitialized when used within its own initialization}}
A a14 = A(a14); // expected-warning {{variable 'a14' is uninitialized when used within its own initialization}}
A a15 = getA(a15.num); // expected-warning {{variable 'a15' is uninitialized when used within its own initialization}}
A a16(&a16.num); // expected-warning {{variable 'a16' is uninitialized when used within its own initialization}}
A a17(a17.get2()); // expected-warning {{variable 'a17' is uninitialized when used within its own initialization}}
A a18 = x ? a18 : a17; // expected-warning {{variable 'a18' is uninitialized when used within its own initialization}}
A a19 = getA(x ? a19 : a17); // expected-warning {{variable 'a19' is uninitialized when used within its own initialization}}
A a20{a20}; // expected-warning {{variable 'a20' is uninitialized when used within its own initialization}}
A a21 = {a21}; // expected-warning {{variable 'a21' is uninitialized when used within its own initialization}}
// FIXME: Make the local uninitialized warning consistent with the global
// uninitialized checking.
A *a22 = new A(a22->count); // expected-warning {{variable 'a22' is uninitialized when used within its own initialization}}
A *a23 = new A(a23->ONE); // expected-warning {{variable 'a23' is uninitialized when used within its own initialization}}
A *a24 = new A(a24->TWO); // expected-warning {{variable 'a24' is uninitialized when used within its own initialization}}
A *a25 = new A(a25->zero()); // expected-warning {{variable 'a25' is uninitialized when used within its own initialization}}
A *a26 = new A(a26->get()); // expected-warning {{variable 'a26' is uninitialized when used within its own initialization}}
A *a27 = new A(a27->get2()); // expected-warning {{variable 'a27' is uninitialized when used within its own initialization}}
A *a28 = new A(a28->num); // expected-warning {{variable 'a28' is uninitialized when used within its own initialization}}
const A a29(a29); // expected-warning {{variable 'a29' is uninitialized when used within its own initialization}}
const A a30 = a30; // expected-warning {{variable 'a30' is uninitialized when used within its own initialization}}
A a31 = std::move(a31); // expected-warning {{variable 'a31' is uninitialized when used within its own initialization}}
A a32 = moveA(std::move(a32)); // expected-warning {{variable 'a32' is uninitialized when used within its own initialization}}
A a33 = A(std::move(a33)); // expected-warning {{variable 'a33' is uninitialized when used within its own initialization}}
A a34(std::move(a34)); // expected-warning {{variable 'a34' is uninitialized when used within its own initialization}}
A a35 = std::move(x ? a34 : (37, a35)); // expected-warning {{variable 'a35' is uninitialized when used within its own initialization}}
A a36 = const_refA(a36);
A a37(const_refA(a37));
A a38({a38}); // expected-warning {{variable 'a38' is uninitialized when used within its own initialization}}
A a39 = {a39}; // expected-warning {{variable 'a39' is uninitialized when used within its own initialization}}
A a40 = A({a40}); // expected-warning {{variable 'a40' is uninitialized when used within its own initialization}}
A a41 = !a41; // expected-warning {{variable 'a41' is uninitialized when used within its own initialization}}
A a42 = !(a42); // expected-warning {{variable 'a42' is uninitialized when used within its own initialization}}
A a43 = a43 != a42; // expected-warning {{variable 'a43' is uninitialized when used within its own initialization}}
A a44 = a43 != a44; // expected-warning {{variable 'a44' is uninitialized when used within its own initialization}}
A a45 = a45 != a45; // expected-warning 2{{variable 'a45' is uninitialized when used within its own initialization}}
A a46 = 0 != a46; // expected-warning {{variable 'a46' is uninitialized when used within its own initialization}}
A a47(a47.set(a47.num)); // expected-warning 2{{variable 'a47' is uninitialized when used within its own initialization}}
A a48(a47.set(a48.num)); // expected-warning {{variable 'a48' is uninitialized when used within its own initialization}}
A a49(a47.set(a48.num));
}
bool cond;
A a1;
A a2(a1.get());
A a3(a1);
A a4(&a4);
A a5(a5.zero());
A a6(a6.ONE);
A a7 = getA();
A a8 = getA(a8.TWO);
A a9 = getA(&a9);
A a10(a10.count);
A a11(a11); // expected-warning {{variable 'a11' is uninitialized when used within its own initialization}}
A a12(a12.get()); // expected-warning {{variable 'a12' is uninitialized when used within its own initialization}}
A a13(a13.num); // expected-warning {{variable 'a13' is uninitialized when used within its own initialization}}
A a14 = A(a14); // expected-warning {{variable 'a14' is uninitialized when used within its own initialization}}
A a15 = getA(a15.num); // expected-warning {{variable 'a15' is uninitialized when used within its own initialization}}
A a16(&a16.num); // expected-warning {{variable 'a16' is uninitialized when used within its own initialization}}
A a17(a17.get2()); // expected-warning {{variable 'a17' is uninitialized when used within its own initialization}}
A a18 = cond ? a18 : a17; // expected-warning {{variable 'a18' is uninitialized when used within its own initialization}}
A a19 = getA(cond ? a19 : a17); // expected-warning {{variable 'a19' is uninitialized when used within its own initialization}}
A a20{a20}; // expected-warning {{variable 'a20' is uninitialized when used within its own initialization}}
A a21 = {a21}; // expected-warning {{variable 'a21' is uninitialized when used within its own initialization}}
A *a22 = new A(a22->count);
A *a23 = new A(a23->ONE);
A *a24 = new A(a24->TWO);
A *a25 = new A(a25->zero());
A *a26 = new A(a26->get()); // expected-warning {{variable 'a26' is uninitialized when used within its own initialization}}
A *a27 = new A(a27->get2()); // expected-warning {{variable 'a27' is uninitialized when used within its own initialization}}
A *a28 = new A(a28->num); // expected-warning {{variable 'a28' is uninitialized when used within its own initialization}}
const A a29(a29); // expected-warning {{variable 'a29' is uninitialized when used within its own initialization}}
const A a30 = a30; // expected-warning {{variable 'a30' is uninitialized when used within its own initialization}}
A a31 = std::move(a31); // expected-warning {{variable 'a31' is uninitialized when used within its own initialization}}
A a32 = moveA(std::move(a32)); // expected-warning {{variable 'a32' is uninitialized when used within its own initialization}}
A a33 = A(std::move(a33)); // expected-warning {{variable 'a33' is uninitialized when used within its own initialization}}
A a34(std::move(a34)); // expected-warning {{variable 'a34' is uninitialized when used within its own initialization}}
A a35 = std::move(x ? a34 : (37, a35)); // expected-warning {{variable 'a35' is uninitialized when used within its own initialization}}
A a36 = const_refA(a36);
A a37(const_refA(a37));
A a38({a38}); // expected-warning {{variable 'a38' is uninitialized when used within its own initialization}}
A a39 = {a39}; // expected-warning {{variable 'a39' is uninitialized when used within its own initialization}}
A a40 = A({a40}); // expected-warning {{variable 'a40' is uninitialized when used within its own initialization}}
A a41 = !a41; // expected-warning {{variable 'a41' is uninitialized when used within its own initialization}}
A a42 = !(a42); // expected-warning {{variable 'a42' is uninitialized when used within its own initialization}}
A a43 = a43 != a42; // expected-warning {{variable 'a43' is uninitialized when used within its own initialization}}
A a44 = a43 != a44; // expected-warning {{variable 'a44' is uninitialized when used within its own initialization}}
A a45 = a45 != a45; // expected-warning 2{{variable 'a45' is uninitialized when used within its own initialization}}
A a46 = 0 != a46; // expected-warning {{variable 'a46' is uninitialized when used within its own initialization}}
A a47(a47.set(a47.num)); // expected-warning 2{{variable 'a47' is uninitialized when used within its own initialization}}
A a48(a47.set(a48.num)); // expected-warning {{variable 'a48' is uninitialized when used within its own initialization}}
A a49(a47.set(a48.num));
class T {
A a, a2;
const A c_a;
A* ptr_a;
T() {}
T(bool (*)[1]) : a() {}
T(bool (*)[2]) : a2(a.get()) {}
T(bool (*)[3]) : a2(a) {}
T(bool (*)[4]) : a(&a) {}
T(bool (*)[5]) : a(a.zero()) {}
T(bool (*)[6]) : a(a.ONE) {}
T(bool (*)[7]) : a(getA()) {}
T(bool (*)[8]) : a2(getA(a.TWO)) {}
T(bool (*)[9]) : a(getA(&a)) {}
T(bool (*)[10]) : a(a.count) {}
T(bool (*)[11]) : a(a) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[12]) : a(a.get()) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[13]) : a(a.num) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[14]) : a(A(a)) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[15]) : a(getA(a.num)) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[16]) : a(&a.num) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[17]) : a(a.get2()) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[18]) : a2(cond ? a2 : a) {} // expected-warning {{field 'a2' is uninitialized when used here}}
T(bool (*)[19]) : a2(cond ? a2 : a) {} // expected-warning {{field 'a2' is uninitialized when used here}}
T(bool (*)[20]) : a{a} {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[21]) : a({a}) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[22]) : ptr_a(new A(ptr_a->count)) {}
T(bool (*)[23]) : ptr_a(new A(ptr_a->ONE)) {}
T(bool (*)[24]) : ptr_a(new A(ptr_a->TWO)) {}
T(bool (*)[25]) : ptr_a(new A(ptr_a->zero())) {}
T(bool (*)[26]) : ptr_a(new A(ptr_a->get())) {} // expected-warning {{field 'ptr_a' is uninitialized when used here}}
T(bool (*)[27]) : ptr_a(new A(ptr_a->get2())) {} // expected-warning {{field 'ptr_a' is uninitialized when used here}}
T(bool (*)[28]) : ptr_a(new A(ptr_a->num)) {} // expected-warning {{field 'ptr_a' is uninitialized when used here}}
T(bool (*)[29]) : c_a(c_a) {} // expected-warning {{field 'c_a' is uninitialized when used here}}
T(bool (*)[30]) : c_a(A(c_a)) {} // expected-warning {{field 'c_a' is uninitialized when used here}}
T(bool (*)[31]) : a(std::move(a)) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[32]) : a(moveA(std::move(a))) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[33]) : a(A(std::move(a))) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[34]) : a(A(std::move(a))) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[35]) : a2(std::move(x ? a : (37, a2))) {} // expected-warning {{field 'a2' is uninitialized when used here}}
T(bool (*)[36]) : a(const_refA(a)) {}
T(bool (*)[37]) : a(A(const_refA(a))) {}
T(bool (*)[38]) : a({a}) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[39]) : a{a} {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[40]) : a({a}) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[41]) : a(!a) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[42]) : a(!(a)) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[43]) : a(), a2(a2 != a) {} // expected-warning {{field 'a2' is uninitialized when used here}}
T(bool (*)[44]) : a(), a2(a != a2) {} // expected-warning {{field 'a2' is uninitialized when used here}}
T(bool (*)[45]) : a(a != a) {} // expected-warning 2{{field 'a' is uninitialized when used here}}
T(bool (*)[46]) : a(0 != a) {} // expected-warning {{field 'a' is uninitialized when used here}}
T(bool (*)[47]) : a2(a2.set(a2.num)) {} // expected-warning 2{{field 'a2' is uninitialized when used here}}
T(bool (*)[48]) : a2(a.set(a2.num)) {} // expected-warning {{field 'a2' is uninitialized when used here}}
T(bool (*)[49]) : a2(a.set(a.num)) {}
};
struct B {
// POD struct.
int x;
int *y;
};
B getB() { return B(); };
B getB(int x) { return B(); };
B getB(int *x) { return B(); };
B getB(B *b) { return B(); };
B moveB(B &&b) { return B(); };
B* getPtrB() { return 0; };
B* getPtrB(int x) { return 0; };
B* getPtrB(int *x) { return 0; };
B* getPtrB(B **b) { return 0; };
void setupB(bool x) {
B b1;
B b2(b1);
B b3 = { 5, &b3.x };
B b4 = getB();
B b5 = getB(&b5);
B b6 = getB(&b6.x);
// Silence unused warning
(void) b2;
(void) b4;
B b7(b7); // expected-warning {{variable 'b7' is uninitialized when used within its own initialization}}
B b8 = getB(b8.x); // expected-warning {{variable 'b8' is uninitialized when used within its own initialization}}
B b9 = getB(b9.y); // expected-warning {{variable 'b9' is uninitialized when used within its own initialization}}
B b10 = getB(-b10.x); // expected-warning {{variable 'b10' is uninitialized when used within its own initialization}}
B* b11 = 0;
B* b12(b11);
B* b13 = getPtrB();
B* b14 = getPtrB(&b14);
(void) b12;
(void) b13;
B* b15 = getPtrB(b15->x); // expected-warning {{variable 'b15' is uninitialized when used within its own initialization}}
B* b16 = getPtrB(b16->y); // expected-warning {{variable 'b16' is uninitialized when used within its own initialization}}
B b17 = { b17.x = 5, b17.y = 0 };
B b18 = { b18.x + 1, b18.y }; // expected-warning 2{{variable 'b18' is uninitialized when used within its own initialization}}
const B b19 = b19; // expected-warning {{variable 'b19' is uninitialized when used within its own initialization}}
const B b20(b20); // expected-warning {{variable 'b20' is uninitialized when used within its own initialization}}
B b21 = std::move(b21); // expected-warning {{variable 'b21' is uninitialized when used within its own initialization}}
B b22 = moveB(std::move(b22)); // expected-warning {{variable 'b22' is uninitialized when used within its own initialization}}
B b23 = B(std::move(b23)); // expected-warning {{variable 'b23' is uninitialized when used within its own initialization}}
B b24 = std::move(x ? b23 : (18, b24)); // expected-warning {{variable 'b24' is uninitialized when used within its own initialization}}
}
B b1;
B b2(b1);
B b3 = { 5, &b3.x };
B b4 = getB();
B b5 = getB(&b5);
B b6 = getB(&b6.x);
B b7(b7); // expected-warning {{variable 'b7' is uninitialized when used within its own initialization}}
B b8 = getB(b8.x); // expected-warning {{variable 'b8' is uninitialized when used within its own initialization}}
B b9 = getB(b9.y); // expected-warning {{variable 'b9' is uninitialized when used within its own initialization}}
B b10 = getB(-b10.x); // expected-warning {{variable 'b10' is uninitialized when used within its own initialization}}
B* b11 = 0;
B* b12(b11);
B* b13 = getPtrB();
B* b14 = getPtrB(&b14);
B* b15 = getPtrB(b15->x); // expected-warning {{variable 'b15' is uninitialized when used within its own initialization}}
B* b16 = getPtrB(b16->y); // expected-warning {{variable 'b16' is uninitialized when used within its own initialization}}
B b17 = { b17.x = 5, b17.y = 0 };
B b18 = { b18.x + 1, b18.y }; // expected-warning 2{{variable 'b18' is uninitialized when used within its own initialization}}
const B b19 = b19; // expected-warning {{variable 'b19' is uninitialized when used within its own initialization}}
const B b20(b20); // expected-warning {{variable 'b20' is uninitialized when used within its own initialization}}
B b21 = std::move(b21); // expected-warning {{variable 'b21' is uninitialized when used within its own initialization}}
B b22 = moveB(std::move(b22)); // expected-warning {{variable 'b22' is uninitialized when used within its own initialization}}
B b23 = B(std::move(b23)); // expected-warning {{variable 'b23' is uninitialized when used within its own initialization}}
B b24 = std::move(x ? b23 : (18, b24)); // expected-warning {{variable 'b24' is uninitialized when used within its own initialization}}
class U {
B b1, b2;
B *ptr1, *ptr2;
const B constb = {};
U() {}
U(bool (*)[1]) : b1() {}
U(bool (*)[2]) : b2(b1) {}
U(bool (*)[3]) : b1{ 5, &b1.x } {}
U(bool (*)[4]) : b1(getB()) {}
U(bool (*)[5]) : b1(getB(&b1)) {}
U(bool (*)[6]) : b1(getB(&b1.x)) {}
U(bool (*)[7]) : b1(b1) {} // expected-warning {{field 'b1' is uninitialized when used here}}
U(bool (*)[8]) : b1(getB(b1.x)) {} // expected-warning {{field 'b1' is uninitialized when used here}}
U(bool (*)[9]) : b1(getB(b1.y)) {} // expected-warning {{field 'b1' is uninitialized when used here}}
U(bool (*)[10]) : b1(getB(-b1.x)) {} // expected-warning {{field 'b1' is uninitialized when used here}}
U(bool (*)[11]) : ptr1(0) {}
U(bool (*)[12]) : ptr1(0), ptr2(ptr1) {}
U(bool (*)[13]) : ptr1(getPtrB()) {}
U(bool (*)[14]) : ptr1(getPtrB(&ptr1)) {}
U(bool (*)[15]) : ptr1(getPtrB(ptr1->x)) {} // expected-warning {{field 'ptr1' is uninitialized when used here}}
U(bool (*)[16]) : ptr2(getPtrB(ptr2->y)) {} // expected-warning {{field 'ptr2' is uninitialized when used here}}
U(bool (*)[17]) : b1 { b1.x = 5, b1.y = 0 } {}
U(bool (*)[18]) : b1 { b1.x + 1, b1.y } {} // expected-warning 2{{field 'b1' is uninitialized when used here}}
U(bool (*)[19]) : constb(constb) {} // expected-warning {{field 'constb' is uninitialized when used here}}
U(bool (*)[20]) : constb(B(constb)) {} // expected-warning {{field 'constb' is uninitialized when used here}}
U(bool (*)[21]) : b1(std::move(b1)) {} // expected-warning {{field 'b1' is uninitialized when used here}}
U(bool (*)[22]) : b1(moveB(std::move(b1))) {} // expected-warning {{field 'b1' is uninitialized when used here}}
U(bool (*)[23]) : b1(B(std::move(b1))) {} // expected-warning {{field 'b1' is uninitialized when used here}}
U(bool (*)[24]) : b2(std::move(x ? b1 : (18, b2))) {} // expected-warning {{field 'b2' is uninitialized when used here}}
};
struct C { char a[100], *e; } car = { .e = car.a };
namespace rdar10398199 {
class FooBase { protected: ~FooBase() {} };
class Foo : public FooBase {
public:
operator int&() const;
};
void stuff();
template <typename T> class FooImpl : public Foo {
T val;
public:
FooImpl(const T &x) : val(x) {}
~FooImpl() { stuff(); }
};
template <typename T> FooImpl<T> makeFoo(const T& x) {
return FooImpl<T>(x);
}
void test() {
const Foo &x = makeFoo(42);
const int&y = makeFoo(42u);
(void)x;
(void)y;
};
}
// PR 12325 - this was a false uninitialized value warning due to
// a broken CFG.
int pr12325(int params) {
int x = ({
while (false)
;
int _v = params;
if (false)
;
_v; // no-warning
});
return x;
}
// Test lambda expressions with -Wuninitialized
int test_lambda() {
auto f1 = [] (int x, int y) { int z; return x + y + z; }; // expected-warning{{variable 'z' is uninitialized when used here}} expected-note {{initialize the variable 'z' to silence this warning}}
return f1(1, 2);
}
namespace {
struct A {
enum { A1 };
static int A2() {return 5;}
int A3;
int A4() { return 5;}
};
struct B {
A a;
};
struct C {
C() {}
C(int x) {}
static A a;
B b;
};
A C::a = A();
// Accessing non-static members will give a warning.
struct D {
C c;
D(char (*)[1]) : c(c.b.a.A1) {}
D(char (*)[2]) : c(c.b.a.A2()) {}
D(char (*)[3]) : c(c.b.a.A3) {} // expected-warning {{field 'c' is uninitialized when used here}}
D(char (*)[4]) : c(c.b.a.A4()) {} // expected-warning {{field 'c' is uninitialized when used here}}
// c::a is static, so it is already initialized
D(char (*)[5]) : c(c.a.A1) {}
D(char (*)[6]) : c(c.a.A2()) {}
D(char (*)[7]) : c(c.a.A3) {}
D(char (*)[8]) : c(c.a.A4()) {}
};
struct E {
int b = 1;
int c = 1;
int a; // This field needs to be last to prevent the cross field
// uninitialized warning.
E(char (*)[1]) : a(a ? b : c) {} // expected-warning {{field 'a' is uninitialized when used here}}
E(char (*)[2]) : a(b ? a : a) {} // expected-warning 2{{field 'a' is uninitialized when used here}}
E(char (*)[3]) : a(b ? (a) : c) {} // expected-warning {{field 'a' is uninitialized when used here}}
E(char (*)[4]) : a(b ? c : (a+c)) {} // expected-warning {{field 'a' is uninitialized when used here}}
E(char (*)[5]) : a(b ? c : b) {}
E(char (*)[6]) : a(a ?: a) {} // expected-warning 2{{field 'a' is uninitialized when used here}}
E(char (*)[7]) : a(b ?: a) {} // expected-warning {{field 'a' is uninitialized when used here}}
E(char (*)[8]) : a(a ?: c) {} // expected-warning {{field 'a' is uninitialized when used here}}
E(char (*)[9]) : a(b ?: c) {}
E(char (*)[10]) : a((a, a, b)) {}
E(char (*)[11]) : a((c + a, a + 1, b)) {} // expected-warning 2{{field 'a' is uninitialized when used here}}
E(char (*)[12]) : a((b + c, c, a)) {} // expected-warning {{field 'a' is uninitialized when used here}}
E(char (*)[13]) : a((a, a, a, a)) {} // expected-warning {{field 'a' is uninitialized when used here}}
E(char (*)[14]) : a((b, c, c)) {}
E(char (*)[15]) : a(b ?: a) {} // expected-warning {{field 'a' is uninitialized when used here}}
E(char (*)[16]) : a(a ?: b) {} // expected-warning {{field 'a' is uninitialized when used here}}
};
struct F {
int a;
F* f;
F(int) {}
F() {}
};
int F::*ptr = &F::a;
F* F::*f_ptr = &F::f;
struct G {
F f1, f2;
F *f3, *f4;
G(char (*)[1]) : f1(f1) {} // expected-warning {{field 'f1' is uninitialized when used here}}
G(char (*)[2]) : f2(f1) {}
G(char (*)[3]) : f2(F()) {}
G(char (*)[4]) : f1(f1.*ptr) {} // expected-warning {{field 'f1' is uninitialized when used here}}
G(char (*)[5]) : f2(f1.*ptr) {}
G(char (*)[6]) : f3(f3) {} // expected-warning {{field 'f3' is uninitialized when used here}}
G(char (*)[7]) : f3(f3->*f_ptr) {} // expected-warning {{field 'f3' is uninitialized when used here}}
G(char (*)[8]) : f3(new F(f3->*ptr)) {} // expected-warning {{field 'f3' is uninitialized when used here}}
};
struct H {
H() : a(a) {} // expected-warning {{field 'a' is uninitialized when used here}}
const A a;
};
}
namespace statics {
static int a = a; // no-warning: used to signal intended lack of initialization.
static int b = b + 1; // expected-warning {{variable 'b' is uninitialized when used within its own initialization}}
static int c = (c + c); // expected-warning 2{{variable 'c' is uninitialized when used within its own initialization}}
static int e = static_cast<long>(e) + 1; // expected-warning {{variable 'e' is uninitialized when used within its own initialization}}
static int f = foo(f); // expected-warning {{variable 'f' is uninitialized when used within its own initialization}}
// These don't warn as they don't require the value.
static int g = sizeof(g);
int gg = g; // Silence unneeded warning
static void* ptr = &ptr;
static int h = bar(&h);
static int i = boo(i);
static int j = far(j);
static int k = __alignof__(k);
static int l = k ? l : l; // expected-warning 2{{variable 'l' is uninitialized when used within its own initialization}}
static int m = 1 + (k ? m : m); // expected-warning 2{{variable 'm' is uninitialized when used within its own initialization}}
static int n = -n; // expected-warning {{variable 'n' is uninitialized when used within its own initialization}}
static int o = std::move(o); // expected-warning {{variable 'o' is uninitialized when used within its own initialization}}
static const int p = std::move(p); // expected-warning {{variable 'p' is uninitialized when used within its own initialization}}
static int q = moved(std::move(q)); // expected-warning {{variable 'q' is uninitialized when used within its own initialization}}
static int r = std::move((p ? q : (18, r))); // expected-warning {{variable 'r' is uninitialized when used within its own initialization}}
static int s = r ?: s; // expected-warning {{variable 's' is uninitialized when used within its own initialization}}
static int t = t ?: s; // expected-warning {{variable 't' is uninitialized when used within its own initialization}}
static int u = (foo(u), s); // expected-warning {{variable 'u' is uninitialized when used within its own initialization}}
static int v = (u += v); // expected-warning {{variable 'v' is uninitialized when used within its own initialization}}
static int w = (w += 10); // expected-warning {{variable 'w' is uninitialized when used within its own initialization}}
static int x = x++; // expected-warning {{variable 'x' is uninitialized when used within its own initialization}}
static int y = ((s ? (y, v) : (77, y))++, sizeof(y)); // expected-warning {{variable 'y' is uninitialized when used within its own initialization}}
static int z = ++ref(z); // expected-warning {{variable 'z' is uninitialized when used within its own initialization}}
static int aa = (ref(aa) += 10); // expected-warning {{variable 'aa' is uninitialized when used within its own initialization}}
static int bb = bb ? x : y; // expected-warning {{variable 'bb' is uninitialized when used within its own initialization}}
void test() {
static int a = a; // no-warning: used to signal intended lack of initialization.
static int b = b + 1; // expected-warning {{static variable 'b' is suspiciously used within its own initialization}}
static int c = (c + c); // expected-warning 2{{static variable 'c' is suspiciously used within its own initialization}}
static int d = ({ d + d ;}); // expected-warning 2{{static variable 'd' is suspiciously used within its own initialization}}
static int e = static_cast<long>(e) + 1; // expected-warning {{static variable 'e' is suspiciously used within its own initialization}}
static int f = foo(f); // expected-warning {{static variable 'f' is suspiciously used within its own initialization}}
// These don't warn as they don't require the value.
static int g = sizeof(g);
static void* ptr = &ptr;
static int h = bar(&h);
static int i = boo(i);
static int j = far(j);
static int k = __alignof__(k);
static int l = k ? l : l; // expected-warning 2{{static variable 'l' is suspiciously used within its own initialization}}
static int m = 1 + (k ? m : m); // expected-warning 2{{static variable 'm' is suspiciously used within its own initialization}}
static int n = -n; // expected-warning {{static variable 'n' is suspiciously used within its own initialization}}
static int o = std::move(o); // expected-warning {{static variable 'o' is suspiciously used within its own initialization}}
static const int p = std::move(p); // expected-warning {{static variable 'p' is suspiciously used within its own initialization}}
static int q = moved(std::move(q)); // expected-warning {{static variable 'q' is suspiciously used within its own initialization}}
static int r = std::move((p ? q : (18, r))); // expected-warning {{static variable 'r' is suspiciously used within its own initialization}}
static int s = r ?: s; // expected-warning {{static variable 's' is suspiciously used within its own initialization}}
static int t = t ?: s; // expected-warning {{static variable 't' is suspiciously used within its own initialization}}
static int u = (foo(u), s); // expected-warning {{static variable 'u' is suspiciously used within its own initialization}}
static int v = (u += v); // expected-warning {{static variable 'v' is suspiciously used within its own initialization}}
static int w = (w += 10); // expected-warning {{static variable 'w' is suspiciously used within its own initialization}}
static int x = x++; // expected-warning {{static variable 'x' is suspiciously used within its own initialization}}
static int y = ((s ? (y, v) : (77, y))++, sizeof(y)); // expected-warning {{static variable 'y' is suspiciously used within its own initialization}}
static int z = ++ref(z); // expected-warning {{static variable 'z' is suspiciously used within its own initialization}}
static int aa = (ref(aa) += 10); // expected-warning {{static variable 'aa' is suspiciously used within its own initialization}}
static int bb = bb ? x : y; // expected-warning {{static variable 'bb' is suspiciously used within its own initialization}}
for (;;) {
static int a = a; // no-warning: used to signal intended lack of initialization.
static int b = b + 1; // expected-warning {{static variable 'b' is suspiciously used within its own initialization}}
static int c = (c + c); // expected-warning 2{{static variable 'c' is suspiciously used within its own initialization}}
static int d = ({ d + d ;}); // expected-warning 2{{static variable 'd' is suspiciously used within its own initialization}}
static int e = static_cast<long>(e) + 1; // expected-warning {{static variable 'e' is suspiciously used within its own initialization}}
static int f = foo(f); // expected-warning {{static variable 'f' is suspiciously used within its own initialization}}
// These don't warn as they don't require the value.
static int g = sizeof(g);
static void* ptr = &ptr;
static int h = bar(&h);
static int i = boo(i);
static int j = far(j);
static int k = __alignof__(k);
static int l = k ? l : l; // expected-warning 2{{static variable 'l' is suspiciously used within its own initialization}}
static int m = 1 + (k ? m : m); // expected-warning 2{{static variable 'm' is suspiciously used within its own initialization}}
static int n = -n; // expected-warning {{static variable 'n' is suspiciously used within its own initialization}}
static int o = std::move(o); // expected-warning {{static variable 'o' is suspiciously used within its own initialization}}
static const int p = std::move(p); // expected-warning {{static variable 'p' is suspiciously used within its own initialization}}
static int q = moved(std::move(q)); // expected-warning {{static variable 'q' is suspiciously used within its own initialization}}
static int r = std::move((p ? q : (18, r))); // expected-warning {{static variable 'r' is suspiciously used within its own initialization}}
static int s = r ?: s; // expected-warning {{static variable 's' is suspiciously used within its own initialization}}
static int t = t ?: s; // expected-warning {{static variable 't' is suspiciously used within its own initialization}}
static int u = (foo(u), s); // expected-warning {{static variable 'u' is suspiciously used within its own initialization}}
static int v = (u += v); // expected-warning {{static variable 'v' is suspiciously used within its own initialization}}
static int w = (w += 10); // expected-warning {{static variable 'w' is suspiciously used within its own initialization}}
static int x = x++; // expected-warning {{static variable 'x' is suspiciously used within its own initialization}}
static int y = ((s ? (y, v) : (77, y))++, sizeof(y)); // expected-warning {{static variable 'y' is suspiciously used within its own initialization}}
static int z = ++ref(z); // expected-warning {{static variable 'z' is suspiciously used within its own initialization}}
static int aa = (ref(aa) += 10); // expected-warning {{static variable 'aa' is suspiciously used within its own initialization}}
static int bb = bb ? x : y; // expected-warning {{static variable 'bb' is suspiciously used within its own initialization}}
}
}
}
namespace in_class_initializers {
struct S {
S() : a(a + 1) {} // expected-warning{{field 'a' is uninitialized when used here}}
int a = 42; // Note: because a is in a member initializer list, this initialization is ignored.
};
struct T {
T() : b(a + 1) {} // No-warning.
int a = 42;
int b;
};
struct U {
U() : a(b + 1), b(a + 1) {} // expected-warning{{field 'b' is uninitialized when used here}}
int a = 42; // Note: because a and b are in the member initializer list, these initializers are ignored.
int b = 1;
};
}
namespace references {
int &a = a; // expected-warning{{reference 'a' is not yet bound to a value when used within its own initialization}}
int &b(b); // expected-warning{{reference 'b' is not yet bound to a value when used within its own initialization}}
int &c = a ? b : c; // expected-warning{{reference 'c' is not yet bound to a value when used within its own initialization}}
int &d{d}; // expected-warning{{reference 'd' is not yet bound to a value when used within its own initialization}}
int &e = d ?: e; // expected-warning{{reference 'e' is not yet bound to a value when used within its own initialization}}
int &f = f ?: d; // expected-warning{{reference 'f' is not yet bound to a value when used within its own initialization}}
int &return_ref1(int);
int &return_ref2(int&);
int &g = return_ref1(g); // expected-warning{{reference 'g' is not yet bound to a value when used within its own initialization}}
int &h = return_ref2(h); // expected-warning{{reference 'h' is not yet bound to a value when used within its own initialization}}
struct S {
S() : a(a) {} // expected-warning{{reference 'a' is not yet bound to a value when used here}}
int &a;
};
void test() {
int &a = a; // expected-warning{{reference 'a' is not yet bound to a value when used within its own initialization}}
int &b(b); // expected-warning{{reference 'b' is not yet bound to a value when used within its own initialization}}
int &c = a ? b : c; // expected-warning{{reference 'c' is not yet bound to a value when used within its own initialization}}
int &d{d}; // expected-warning{{reference 'd' is not yet bound to a value when used within its own initialization}}
}
struct T {
T() // expected-note{{during field initialization in this constructor}}
: a(b), b(a) {} // expected-warning{{reference 'b' is not yet bound to a value when used here}}
int &a, &b;
int &c = c; // expected-warning{{reference 'c' is not yet bound to a value when used here}}
};
int x;
struct U {
U() : b(a) {} // No-warning.
int &a = x;
int &b;
};
}
namespace operators {
struct A {
A(bool);
bool operator==(A);
};
A makeA();
A a1 = a1 = makeA(); // expected-warning{{variable 'a1' is uninitialized when used within its own initialization}}
A a2 = a2 == a1; // expected-warning{{variable 'a2' is uninitialized when used within its own initialization}}
A a3 = a2 == a3; // expected-warning{{variable 'a3' is uninitialized when used within its own initialization}}
int x = x = 5;
}
namespace lambdas {
struct A {
template<typename T> A(T) {}
int x;
};
A a0([] { return a0.x; }); // ok
void f() {
A a1([=] { // expected-warning{{variable 'a1' is uninitialized when used within its own initialization}}
return a1.x;
});
A a2([&] { return a2.x; }); // ok
}
}
namespace record_fields {
bool x;
struct A {
A() {}
A get();
static A num();
static A copy(A);
static A something(A&);
};
A ref(A&);
A const_ref(const A&);
A pointer(A*);
A normal(A);
A rref(A&&);
struct B {
A a;
B(char (*)[1]) : a(a) {} // expected-warning {{uninitialized}}
B(char (*)[2]) : a(a.get()) {} // expected-warning {{uninitialized}}
B(char (*)[3]) : a(a.num()) {}
B(char (*)[4]) : a(a.copy(a)) {} // expected-warning {{uninitialized}}
B(char (*)[5]) : a(a.something(a)) {}
B(char (*)[6]) : a(ref(a)) {}
B(char (*)[7]) : a(const_ref(a)) {}
B(char (*)[8]) : a(pointer(&a)) {}
B(char (*)[9]) : a(normal(a)) {} // expected-warning {{uninitialized}}
B(char (*)[10]) : a(std::move(a)) {} // expected-warning {{uninitialized}}
B(char (*)[11]) : a(A(std::move(a))) {} // expected-warning {{uninitialized}}
B(char (*)[12]) : a(rref(std::move(a))) {} // expected-warning {{uninitialized}}
B(char (*)[13]) : a(std::move(x ? a : (25, a))) {} // expected-warning 2{{uninitialized}}
};
struct C {
C() {} // expected-note9{{in this constructor}}
A a1 = a1; // expected-warning {{uninitialized}}
A a2 = a2.get(); // expected-warning {{uninitialized}}
A a3 = a3.num();
A a4 = a4.copy(a4); // expected-warning {{uninitialized}}
A a5 = a5.something(a5);
A a6 = ref(a6);
A a7 = const_ref(a7);
A a8 = pointer(&a8);
A a9 = normal(a9); // expected-warning {{uninitialized}}
const A a10 = a10; // expected-warning {{uninitialized}}
A a11 = std::move(a11); // expected-warning {{uninitialized}}
A a12 = A(std::move(a12)); // expected-warning {{uninitialized}}
A a13 = rref(std::move(a13)); // expected-warning {{uninitialized}}
A a14 = std::move(x ? a13 : (22, a14)); // expected-warning {{uninitialized}}
};
struct D { // expected-note9{{in the implicit default constructor}}
A a1 = a1; // expected-warning {{uninitialized}}
A a2 = a2.get(); // expected-warning {{uninitialized}}
A a3 = a3.num();
A a4 = a4.copy(a4); // expected-warning {{uninitialized}}
A a5 = a5.something(a5);
A a6 = ref(a6);
A a7 = const_ref(a7);
A a8 = pointer(&a8);
A a9 = normal(a9); // expected-warning {{uninitialized}}
const A a10 = a10; // expected-warning {{uninitialized}}
A a11 = std::move(a11); // expected-warning {{uninitialized}}
A a12 = A(std::move(a12)); // expected-warning {{uninitialized}}
A a13 = rref(std::move(a13)); // expected-warning {{uninitialized}}
A a14 = std::move(x ? a13 : (22, a14)); // expected-warning {{uninitialized}}
};
D d; // expected-note {{in implicit default constructor for 'record_fields::D' first required here}}
struct E {
A a1 = a1;
A a2 = a2.get();
A a3 = a3.num();
A a4 = a4.copy(a4);
A a5 = a5.something(a5);
A a6 = ref(a6);
A a7 = const_ref(a7);
A a8 = pointer(&a8);
A a9 = normal(a9);
const A a10 = a10;
A a11 = std::move(a11);
A a12 = A(std::move(a12));
A a13 = rref(std::move(a13));
A a14 = std::move(x ? a13 : (22, a14));
};
}
namespace cross_field_warnings {
struct A {
int a, b;
A() {}
A(char (*)[1]) : b(a) {} // expected-warning{{field 'a' is uninitialized when used here}}
A(char (*)[2]) : a(b) {} // expected-warning{{field 'b' is uninitialized when used here}}
};
struct B {
int a = b; // expected-warning{{field 'b' is uninitialized when used here}}
int b;
B() {} // expected-note{{during field initialization in this constructor}}
};
struct C {
int a;
int b = a; // expected-warning{{field 'a' is uninitialized when used here}}
C(char (*)[1]) : a(5) {}
C(char (*)[2]) {} // expected-note{{during field initialization in this constructor}}
};
struct D {
int a;
int &b;
int &c = a;
int d = b;
D() : b(a) {}
};
struct E {
int a;
int get();
static int num();
E() {}
E(int) {}
};
struct F {
int a;
E e;
int b;
F(char (*)[1]) : a(e.get()) {} // expected-warning{{field 'e' is uninitialized when used here}}
F(char (*)[2]) : a(e.num()) {}
F(char (*)[3]) : e(a) {} // expected-warning{{field 'a' is uninitialized when used here}}
F(char (*)[4]) : a(4), e(a) {}
F(char (*)[5]) : e(b) {} // expected-warning{{field 'b' is uninitialized when used here}}
F(char (*)[6]) : e(b), b(4) {} // expected-warning{{field 'b' is uninitialized when used here}}
};
struct G {
G(const A&) {};
};
struct H {
A a1;
G g;
A a2;
H() : g(a1) {}
H(int) : g(a2) {}
};
struct I {
I(int*) {}
};
struct J : public I {
int *a;
int *b;
int c;
J() : I((a = new int(5))), b(a), c(*a) {}
};
struct K {
int a = (b = 5);
int b = b + 5;
};
struct L {
int a = (b = 5);
int b = b + 5; // expected-warning{{field 'b' is uninitialized when used here}}
L() : a(5) {} // expected-note{{during field initialization in this constructor}}
};
struct M { };
struct N : public M {
int a;
int b;
N() : b(a) { } // expected-warning{{field 'a' is uninitialized when used here}}
};
struct O {
int x = 42;
int get() { return x; }
};
struct P {
O o;
int x = o.get();
P() : x(o.get()) { }
};
struct Q {
int a;
int b;
int &c;
Q() :
a(c = 5), // expected-warning{{reference 'c' is not yet bound to a value when used here}}
b(c), // expected-warning{{reference 'c' is not yet bound to a value when used here}}
c(a) {}
};
struct R {
int a;
int b;
int c;
int d = a + b + c;
R() : a(c = 5), b(c), c(a) {}
};
// FIXME: Use the CFG-based analysis to give a sometimes uninitialized
// warning on y.
struct T {
int x;
int y;
T(bool b)
: x(b ? (y = 5) : (1 + y)), // expected-warning{{field 'y' is uninitialized when used here}}
y(y + 1) {}
T(int b)
: x(!b ? (1 + y) : (y = 5)), // expected-warning{{field 'y' is uninitialized when used here}}
y(y + 1) {}
};
}
namespace base_class {
struct A {
A (int) {}
};
struct B : public A {
int x;
B() : A(x) {} // expected-warning{{field 'x' is uninitialized when used here}}
};
struct C : public A {
int x;
int y;
C() : A(y = 4), x(y) {}
};
}
namespace delegating_constructor {
struct A {
A(int);
A(int&, int);
A(char (*)[1]) : A(x) {}
// expected-warning@-1 {{field 'x' is uninitialized when used here}}
A(char (*)[2]) : A(x, x) {}
// expected-warning@-1 {{field 'x' is uninitialized when used here}}
A(char (*)[3]) : A(x, 0) {}
int x;
};
}
namespace init_list {
int num = 5;
struct A { int i1, i2; };
struct B { A a1, a2; };
A a1{1,2};
A a2{a2.i1 + 2}; // expected-warning{{uninitialized}}
A a3 = {a3.i1 + 2}; // expected-warning{{uninitialized}}
A a4 = A{a4.i2 + 2}; // expected-warning{{uninitialized}}
B b1 = { {}, {} };
B b2 = { {}, b2.a1 };
B b3 = { b3.a1 }; // expected-warning{{uninitialized}}
B b4 = { {}, b4.a2} ; // expected-warning{{uninitialized}}
B b5 = { b5.a2 }; // expected-warning{{uninitialized}}
B b6 = { {b6.a1.i1} }; // expected-warning{{uninitialized}}
B b7 = { {0, b7.a1.i1} };
B b8 = { {}, {b8.a1.i1} };
B b9 = { {}, {0, b9.a1.i1} };
B b10 = { {b10.a1.i2} }; // expected-warning{{uninitialized}}
B b11 = { {0, b11.a1.i2} }; // expected-warning{{uninitialized}}
B b12 = { {}, {b12.a1.i2} };
B b13 = { {}, {0, b13.a1.i2} };
B b14 = { {b14.a2.i1} }; // expected-warning{{uninitialized}}
B b15 = { {0, b15.a2.i1} }; // expected-warning{{uninitialized}}
B b16 = { {}, {b16.a2.i1} }; // expected-warning{{uninitialized}}
B b17 = { {}, {0, b17.a2.i1} };
B b18 = { {b18.a2.i2} }; // expected-warning{{uninitialized}}
B b19 = { {0, b19.a2.i2} }; // expected-warning{{uninitialized}}
B b20 = { {}, {b20.a2.i2} }; // expected-warning{{uninitialized}}
B b21 = { {}, {0, b21.a2.i2} }; // expected-warning{{uninitialized}}
B b22 = { {b18.a2.i2 + 5} };
struct C {int a; int& b; int c; };
C c1 = { 0, num, 0 };
C c2 = { 1, num, c2.b };
C c3 = { c3.b, num }; // expected-warning{{uninitialized}}
C c4 = { 0, c4.b, 0 }; // expected-warning{{uninitialized}}
C c5 = { 0, c5.c, 0 };
C c6 = { c6.b, num, 0 }; // expected-warning{{uninitialized}}
C c7 = { 0, c7.a, 0 };
struct D {int &a; int &b; };
D d1 = { num, num };
D d2 = { num, d2.a };
D d3 = { d3.b, num }; // expected-warning{{uninitialized}}
// Same as above in member initializer form.
struct Awrapper {
A a1{1,2};
A a2{a2.i1 + 2}; // expected-warning{{uninitialized}}
A a3 = {a3.i1 + 2}; // expected-warning{{uninitialized}}
A a4 = A{a4.i2 + 2}; // expected-warning{{uninitialized}}
Awrapper() {} // expected-note 3{{in this constructor}}
Awrapper(int) :
a1{1,2},
a2{a2.i1 + 2}, // expected-warning{{uninitialized}}
a3{a3.i1 + 2}, // expected-warning{{uninitialized}}
a4{a4.i2 + 2} // expected-warning{{uninitialized}}
{}
};
struct Bwrapper {
B b1 = { {}, {} };
B b2 = { {}, b2.a1 };
B b3 = { b3.a1 }; // expected-warning{{uninitialized}}
B b4 = { {}, b4.a2} ; // expected-warning{{uninitialized}}
B b5 = { b5.a2 }; // expected-warning{{uninitialized}}
B b6 = { {b6.a1.i1} }; // expected-warning{{uninitialized}}
B b7 = { {0, b7.a1.i1} };
B b8 = { {}, {b8.a1.i1} };
B b9 = { {}, {0, b9.a1.i1} };
B b10 = { {b10.a1.i2} }; // expected-warning{{uninitialized}}
B b11 = { {0, b11.a1.i2} }; // expected-warning{{uninitialized}}
B b12 = { {}, {b12.a1.i2} };
B b13 = { {}, {0, b13.a1.i2} };
B b14 = { {b14.a2.i1} }; // expected-warning{{uninitialized}}
B b15 = { {0, b15.a2.i1} }; // expected-warning{{uninitialized}}
B b16 = { {}, {b16.a2.i1} }; // expected-warning{{uninitialized}}
B b17 = { {}, {0, b17.a2.i1} };
B b18 = { {b18.a2.i2} }; // expected-warning{{uninitialized}}
B b19 = { {0, b19.a2.i2} }; // expected-warning{{uninitialized}}
B b20 = { {}, {b20.a2.i2} }; // expected-warning{{uninitialized}}
B b21 = { {}, {0, b21.a2.i2} }; // expected-warning{{uninitialized}}
B b22 = { {b18.a2.i2 + 5} };
Bwrapper() {} // expected-note 13{{in this constructor}}
Bwrapper(int) :
b1{ {}, {} },
b2{ {}, b2.a1 },
b3{ b3.a1 }, // expected-warning{{uninitialized}}
b4{ {}, b4.a2}, // expected-warning{{uninitialized}}
b5{ b5.a2 }, // expected-warning{{uninitialized}}
b6{ {b6.a1.i1} }, // expected-warning{{uninitialized}}
b7{ {0, b7.a1.i1} },
b8{ {}, {b8.a1.i1} },
b9{ {}, {0, b9.a1.i1} },
b10{ {b10.a1.i2} }, // expected-warning{{uninitialized}}
b11{ {0, b11.a1.i2} }, // expected-warning{{uninitialized}}
b12{ {}, {b12.a1.i2} },
b13{ {}, {0, b13.a1.i2} },
b14{ {b14.a2.i1} }, // expected-warning{{uninitialized}}
b15{ {0, b15.a2.i1} }, // expected-warning{{uninitialized}}
b16{ {}, {b16.a2.i1} }, // expected-warning{{uninitialized}}
b17{ {}, {0, b17.a2.i1} },
b18{ {b18.a2.i2} }, // expected-warning{{uninitialized}}
b19{ {0, b19.a2.i2} }, // expected-warning{{uninitialized}}
b20{ {}, {b20.a2.i2} }, // expected-warning{{uninitialized}}
b21{ {}, {0, b21.a2.i2} }, // expected-warning{{uninitialized}}
b22{ {b18.a2.i2 + 5} }
{}
};
struct Cwrapper {
C c1 = { 0, num, 0 };
C c2 = { 1, num, c2.b };
C c3 = { c3.b, num }; // expected-warning{{uninitialized}}
C c4 = { 0, c4.b, 0 }; // expected-warning{{uninitialized}}
C c5 = { 0, c5.c, 0 };
C c6 = { c6.b, num, 0 }; // expected-warning{{uninitialized}}
C c7 = { 0, c7.a, 0 };
Cwrapper() {} // expected-note 3{{in this constructor}}
Cwrapper(int) :
c1{ 0, num, 0 },
c2{ 1, num, c2.b },
c3{ c3.b, num }, // expected-warning{{uninitialized}}
c4{ 0, c4.b, 0 }, // expected-warning{{uninitialized}}
c5{ 0, c5.c, 0 },
c6{ c6.b, num, 0 }, // expected-warning{{uninitialized}}
c7{ 0, c7.a, 0 }
{}
};
struct Dwrapper {
D d1 = { num, num };
D d2 = { num, d2.a };
D d3 = { d3.b, num }; // expected-warning{{uninitialized}}
Dwrapper() {} // expected-note{{in this constructor}}
Dwrapper(int) :
d1{ num, num },
d2{ num, d2.a },
d3{ d3.b, num } // expected-warning{{uninitialized}}
{}
};
struct E {
E();
E foo();
E* operator->();
};
struct F { F(E); };
struct EFComposed {
F f;
E e;
EFComposed() : f{ e->foo() }, e() {} // expected-warning{{uninitialized}}
};
}
namespace template_class {
class Foo {
public:
int *Create() { return nullptr; }
};
template <typename T>
class A {
public:
// Don't warn on foo here.
A() : ptr(foo->Create()) {}
private:
Foo *foo = new Foo;
int *ptr;
};
template <typename T>
class B {
public:
// foo is uninitialized here, but class B is never instantiated.
B() : ptr(foo->Create()) {}
private:
Foo *foo;
int *ptr;
};
template <typename T>
class C {
public:
C() : ptr(foo->Create()) {}
// expected-warning@-1 {{field 'foo' is uninitialized when used here}}
private:
Foo *foo;
int *ptr;
};
C<int> c;
// expected-note@-1 {{in instantiation of member function 'template_class::C<int>::C' requested here}}
}
namespace base_class_access {
struct A {
A();
A(int);
int i;
int foo();
static int bar();
};
struct B : public A {
B(int (*)[1]) : A() {}
B(int (*)[2]) : A(bar()) {}
B(int (*)[3]) : A(i) {}
// expected-warning@-1 {{base class 'base_class_access::A' is uninitialized when used here to access 'base_class_access::A::i'}}
B(int (*)[4]) : A(foo()) {}
// expected-warning@-1 {{base_class_access::A' is uninitialized when used here to access 'base_class_access::A::foo'}}
};
struct C {
C(int) {}
};
struct D : public C, public A {
D(int (*)[1]) : C(0) {}
D(int (*)[2]) : C(bar()) {}
D(int (*)[3]) : C(i) {}
// expected-warning@-1 {{base class 'base_class_access::A' is uninitialized when used here to access 'base_class_access::A::i'}}
D(int (*)[4]) : C(foo()) {}
// expected-warning@-1 {{base_class_access::A' is uninitialized when used here to access 'base_class_access::A::foo'}}
};
}
namespace value {
template <class T> T move(T t);
template <class T> T notmove(T t);
}
namespace lvalueref {
template <class T> T move(T& t);
template <class T> T notmove(T& t);
}
namespace rvalueref {
template <class T> T move(T&& t);
template <class T> T notmove(T&& t);
}
namespace move_test {
int a1 = std::move(a1); // expected-warning {{uninitialized}}
int a2 = value::move(a2); // expected-warning {{uninitialized}}
int a3 = value::notmove(a3); // expected-warning {{uninitialized}}
int a4 = lvalueref::move(a4);
int a5 = lvalueref::notmove(a5);
int a6 = rvalueref::move(a6);
int a7 = rvalueref::notmove(a7);
void test() {
int a1 = std::move(a1); // expected-warning {{uninitialized}}
int a2 = value::move(a2); // expected-warning {{uninitialized}}
int a3 = value::notmove(a3); // expected-warning {{uninitialized}}
int a4 = lvalueref::move(a4);
int a5 = lvalueref::notmove(a5);
int a6 = rvalueref::move(a6);
int a7 = rvalueref::notmove(a7);
}
class A {
int a;
A(int (*) [1]) : a(std::move(a)) {} // expected-warning {{uninitialized}}
A(int (*) [2]) : a(value::move(a)) {} // expected-warning {{uninitialized}}
A(int (*) [3]) : a(value::notmove(a)) {} // expected-warning {{uninitialized}}
A(int (*) [4]) : a(lvalueref::move(a)) {}
A(int (*) [5]) : a(lvalueref::notmove(a)) {}
A(int (*) [6]) : a(rvalueref::move(a)) {}
A(int (*) [7]) : a(rvalueref::notmove(a)) {}
};
}
void array_capture(bool b) {
const char fname[] = "array_capture";
if (b) {
int unused; // expected-warning {{unused variable}}
} else {
[fname]{};
}
}
void if_switch_init_stmt(int k) {
if (int n = 0; (n == k || k > 5)) {}
if (int n; (n == k || k > 5)) {} // expected-warning {{uninitialized}} expected-note {{initialize}}
switch (int n = 0; (n == k || k > 5)) {} // expected-warning {{boolean}}
switch (int n; (n == k || k > 5)) {} // expected-warning {{uninitialized}} expected-note {{initialize}} expected-warning {{boolean}}
}
template<typename T> struct Outer {
struct Inner {
int a = 1;
int b;
Inner() : b(a) {}
};
};
Outer<int>::Inner outerinner;
Codebase Browser
llvm