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// RUN: %clang_cc1 -fsyntax-only -fblocks -verify %s
// FIXME: Only the stack-address checking in Sema catches this right now, and
// the stack analyzer doesn't handle the ImplicitCastExpr (lvalue).
const int& g() {
int s;
return s; // expected-warning{{reference to stack memory associated with local variable 's' returned}}
}
const int& g2() {
int s1;
int &s2 = s1; // expected-note {{binding reference variable 's2' here}}
return s2; // expected-warning {{reference to stack memory associated with local variable 's1' returned}}
}
const int& g3() {
int s1;
int &s2 = s1; // expected-note {{binding reference variable 's2' here}}
int &s3 = s2; // expected-note {{binding reference variable 's3' here}}
return s3; // expected-warning {{reference to stack memory associated with local variable 's1' returned}}
}
int get_value();
const int &get_reference1() { return get_value(); } // expected-warning {{returning reference to local temporary}}
const int &get_reference2() {
const int &x = get_value(); // expected-note {{binding reference variable 'x' here}}
return x; // expected-warning {{returning reference to local temporary}}
}
const int &get_reference3() {
const int &x1 = get_value(); // expected-note {{binding reference variable 'x1' here}}
const int &x2 = x1; // expected-note {{binding reference variable 'x2' here}}
return x2; // expected-warning {{returning reference to local temporary}}
}
int global_var;
int *f1() {
int &y = global_var;
return &y;
}
int *f2() {
int x1;
int &x2 = x1; // expected-note {{binding reference variable 'x2' here}}
return &x2; // expected-warning {{address of stack memory associated with local variable 'x1' returned}}
}
int *f3() {
int x1;
int *const &x2 = &x1; // expected-note {{binding reference variable 'x2' here}}
return x2; // expected-warning {{address of stack memory associated with local variable 'x1' returned}}
}
const int *f4() {
const int &x1 = get_value(); // expected-note {{binding reference variable 'x1' here}}
const int &x2 = x1; // expected-note {{binding reference variable 'x2' here}}
return &x2; // expected-warning {{returning address of local temporary}}
}
struct S {
int x;
};
int *mf() {
S s1;
S &s2 = s1; // expected-note {{binding reference variable 's2' here}}
int &x = s2.x; // expected-note {{binding reference variable 'x' here}}
return &x; // expected-warning {{address of stack memory associated with local variable 's1' returned}}
}
void *lf() {
label:
void *const &x = &&label; // expected-note {{binding reference variable 'x' here}}
return x; // expected-warning {{returning address of label, which is local}}
}
typedef void (^bptr)(void);
bptr bf(int j) {
__block int i;
const bptr &qq = ^{ i=0; }; // expected-note {{binding reference variable 'qq' here}}
return qq; // expected-error {{returning block that lives on the local stack}}
}
template <typename T>
struct TS {
int *get();
int *m() {
int *&x = get();
return x;
}
};
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