51 lines
1.0 KiB
C++
51 lines
1.0 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -Wself-assign -verify %s
|
|
|
|
void f() {
|
|
int a = 42, b = 42;
|
|
a = a; // expected-warning{{explicitly assigning}}
|
|
b = b; // expected-warning{{explicitly assigning}}
|
|
a = b;
|
|
b = a = b;
|
|
a = a = a; // expected-warning{{explicitly assigning}}
|
|
a = b = b = a;
|
|
a &= a; // expected-warning{{explicitly assigning}}
|
|
a |= a; // expected-warning{{explicitly assigning}}
|
|
a ^= a;
|
|
}
|
|
|
|
// Dummy type.
|
|
struct S {};
|
|
|
|
void false_positives() {
|
|
#define OP =
|
|
#define LHS a
|
|
#define RHS a
|
|
int a = 42;
|
|
// These shouldn't warn due to the use of the preprocessor.
|
|
a OP a;
|
|
LHS = a;
|
|
a = RHS;
|
|
LHS OP RHS;
|
|
#undef OP
|
|
#undef LHS
|
|
#undef RHS
|
|
|
|
S s;
|
|
s = s; // Not a builtin assignment operator, no warning.
|
|
|
|
// Volatile stores aren't side-effect free.
|
|
volatile int vol_a;
|
|
vol_a = vol_a;
|
|
volatile int &vol_a_ref = vol_a;
|
|
vol_a_ref = vol_a_ref;
|
|
}
|
|
|
|
template <typename T> void g() {
|
|
T a;
|
|
a = a; // May or may not be a builtin assignment operator, no warning.
|
|
}
|
|
void instantiate() {
|
|
g<int>();
|
|
g<S>();
|
|
}
|