122 lines
3.6 KiB
C++
122 lines
3.6 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 -Wimplicit-fallthrough %s
|
|
// XFAIL: *
|
|
|
|
// NOTE: This test is marked XFAIL until we come up with a good language design
|
|
// for a worfklow to use this warning outside of C++11.
|
|
|
|
int fallthrough(int n) {
|
|
switch (n / 10) {
|
|
if (n - 1) {
|
|
n = 100;
|
|
} else if (n - 2) {
|
|
n = 101;
|
|
} else if (n - 3) {
|
|
n = 102;
|
|
}
|
|
case -1: // expected-warning{{unannotated fall-through between switch labels}} expected-note{{insert 'break;' to avoid fall-through}}
|
|
;
|
|
case 0: {// expected-warning{{unannotated fall-through between switch labels}} expected-note{{insert 'break;' to avoid fall-through}}
|
|
}
|
|
case 1: // expected-warning{{unannotated fall-through between switch labels}} expected-note{{insert 'break;' to avoid fall-through}}
|
|
n += 100 ;
|
|
case 3: // expected-warning{{unannotated fall-through between switch labels}} expected-note{{insert 'break;' to avoid fall-through}}
|
|
if (n > 0)
|
|
n += 200;
|
|
case 4: // expected-warning{{unannotated fall-through between switch labels}} expected-note{{insert 'break;' to avoid fall-through}}
|
|
if (n < 0)
|
|
;
|
|
case 5: // expected-warning{{unannotated fall-through between switch labels}} expected-note{{insert 'break;' to avoid fall-through}}
|
|
switch (n) {
|
|
case 111:
|
|
break;
|
|
case 112:
|
|
break;
|
|
case 113:
|
|
break ;
|
|
}
|
|
case 6: // expected-warning{{unannotated fall-through between switch labels}} expected-note{{insert 'break;' to avoid fall-through}}
|
|
n += 300;
|
|
}
|
|
switch (n / 30) {
|
|
case 11:
|
|
case 12: // no warning here, intended fall-through, no statement between labels
|
|
n += 1600;
|
|
}
|
|
switch (n / 40) {
|
|
case 13:
|
|
if (n % 2 == 0) {
|
|
return 1;
|
|
} else {
|
|
return 2;
|
|
}
|
|
case 15: // no warning here, there's no fall-through
|
|
n += 3200;
|
|
}
|
|
switch (n / 50) {
|
|
case 17: {
|
|
if (n % 2 == 0) {
|
|
return 1;
|
|
} else {
|
|
return 2;
|
|
}
|
|
}
|
|
case 19: { // no warning here, there's no fall-through
|
|
n += 6400;
|
|
return 3;
|
|
}
|
|
case 21: { // no warning here, there's no fall-through
|
|
break;
|
|
}
|
|
case 23: // no warning here, there's no fall-through
|
|
n += 128000;
|
|
break;
|
|
case 25: // no warning here, there's no fall-through
|
|
break;
|
|
}
|
|
|
|
return n;
|
|
}
|
|
|
|
class ClassWithDtor {
|
|
public:
|
|
~ClassWithDtor() {}
|
|
};
|
|
|
|
void fallthrough2(int n) {
|
|
switch (n) {
|
|
case 0:
|
|
{
|
|
ClassWithDtor temp;
|
|
break;
|
|
}
|
|
default: // no warning here, there's no fall-through
|
|
break;
|
|
}
|
|
}
|
|
|
|
#define MY_SWITCH(X, Y, Z, U, V) switch (X) { case Y: Z; case U: V; }
|
|
#define MY_SWITCH2(X, Y, Z) switch (X) { Y; Z; }
|
|
#define MY_CASE(X, Y) case X: Y
|
|
#define MY_CASE2(X, Y, U, V) case X: Y; case U: V
|
|
|
|
int fallthrough_macro1(int n) {
|
|
MY_SWITCH(n, 13, n *= 2, 14, break) // expected-warning{{unannotated fall-through between switch labels}}
|
|
|
|
switch (n + 1) {
|
|
MY_CASE(33, n += 2);
|
|
MY_CASE(44, break); // expected-warning{{unannotated fall-through between switch labels}}
|
|
MY_CASE(55, n += 3);
|
|
}
|
|
|
|
switch (n + 3) {
|
|
MY_CASE(333, return 333);
|
|
MY_CASE2(444, n += 44, 4444, break); // expected-warning{{unannotated fall-through between switch labels}}
|
|
MY_CASE(555, n += 33);
|
|
}
|
|
|
|
MY_SWITCH2(n + 4, MY_CASE(17, n *= 3), MY_CASE(19, break)) // expected-warning{{unannotated fall-through between switch labels}}
|
|
|
|
MY_SWITCH2(n + 5, MY_CASE(21, break), MY_CASE2(23, n *= 7, 25, break)) // expected-warning{{unannotated fall-through between switch labels}}
|
|
|
|
return n;
|
|
}
|