71 lines
2.4 KiB
C++
71 lines
2.4 KiB
C++
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// RUN: %clang_cc1 -fsyntax-only -std=c++1z -verify %s
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void f(int n) {
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switch (n) {
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case 0:
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n += 1;
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[[fallthrough]]; // ok
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case 1:
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if (n) {
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[[fallthrough]]; // ok
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} else {
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return;
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}
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case 2:
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for (int n = 0; n != 10; ++n)
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[[fallthrough]]; // expected-error {{does not directly precede switch label}}
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case 3:
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while (true)
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[[fallthrough]]; // expected-error {{does not directly precede switch label}}
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case 4:
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while (false)
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[[fallthrough]]; // expected-error {{does not directly precede switch label}}
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case 5:
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do [[fallthrough]]; while (true); // expected-error {{does not directly precede switch label}}
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case 6:
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do [[fallthrough]]; while (false); // expected-error {{does not directly precede switch label}}
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case 7:
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switch (n) {
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case 0:
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// FIXME: This should be an error, even though the next thing we do is to
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// fall through in an outer switch statement.
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[[fallthrough]];
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}
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case 8:
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[[fallthrough]]; // expected-error {{does not directly precede switch label}}
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goto label;
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label:
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case 9:
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n += 1;
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case 10: // no warning, -Wimplicit-fallthrough is not enabled in this test, and does not need to
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// be enabled for these diagnostics to be produced.
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break;
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}
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}
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[[fallthrough]] typedef int n; // expected-error {{'fallthrough' attribute cannot be applied to a declaration}}
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typedef int [[fallthrough]] n; // expected-error {{'fallthrough' attribute cannot be applied to types}}
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typedef int n [[fallthrough]]; // expected-error {{'fallthrough' attribute cannot be applied to a declaration}}
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enum [[fallthrough]] E {}; // expected-error {{'fallthrough' attribute cannot be applied to a declaration}}
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class [[fallthrough]] C {}; // expected-error {{'fallthrough' attribute cannot be applied to a declaration}}
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[[fallthrough]] // expected-error {{'fallthrough' attribute cannot be applied to a declaration}}
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void g() {
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[[fallthrough]] int n; // expected-error {{'fallthrough' attribute cannot be applied to a declaration}}
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[[fallthrough]] ++n; // expected-error-re {{{{^}}fallthrough attribute is only allowed on empty statements}}
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switch (n) {
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// FIXME: This should be an error.
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[[fallthrough]];
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return;
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case 0:
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[[fallthrough, fallthrough]]; // expected-error {{multiple times}}
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case 1:
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[[fallthrough(0)]]; // expected-error {{argument list}}
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case 2:
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break;
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}
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}
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