4f902c7ecc
exactly the same as clang's existing [[clang::fallthrough]] attribute, which has been updated to have the same semantics. The one significant difference is that [[fallthrough]] is ill-formed if it's not used immediately before a switch label (even when -Wimplicit-fallthrough is disabled). To support that, we now build a CFG of any function that uses a '[[fallthrough]];' statement to check. In passing, fix some bugs with our support for statement attributes -- in particular, diagnose their use on declarations, rather than asserting. llvm-svn: 262881
17 lines
1.1 KiB
C++
17 lines
1.1 KiB
C++
// Sanity check.
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// RUN: %clang_cc1 -include %S/Inputs/cxx11-statement-attributes.h -std=c++11 -Wimplicit-fallthrough -fsyntax-only %s -o - -verify
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// RUN: %clang_cc1 -include %S/Inputs/cxx11-statement-attributes.h -std=c++1z -Wimplicit-fallthrough -fsyntax-only %s -o - -verify
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// Run the same tests, this time with the attributes loaded from the PCH file.
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// RUN: %clang_cc1 -x c++-header -emit-pch -std=c++11 -o %t %S/Inputs/cxx11-statement-attributes.h
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// RUN: %clang_cc1 -include-pch %t -std=c++11 -Wimplicit-fallthrough -fsyntax-only %s -o - -verify
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// RUN: %clang_cc1 -x c++-header -emit-pch -std=c++1z -o %t %S/Inputs/cxx11-statement-attributes.h
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// RUN: %clang_cc1 -include-pch %t -std=c++1z -Wimplicit-fallthrough -fsyntax-only %s -o - -verify
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// expected-warning@Inputs/cxx11-statement-attributes.h:10 {{unannotated fall-through}}
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// expected-note-re@Inputs/cxx11-statement-attributes.h:10 {{insert '[[{{(clang::)?}}fallthrough]];'}}
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// expected-note@Inputs/cxx11-statement-attributes.h:10 {{insert 'break;'}}
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void g(int n) {
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f<1>(n); // expected-note {{in instantiation of function template specialization 'f<1>' requested here}}
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}
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