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