c65186c89f
With 118f966b46, Clang matches GCC's behaviour and allows enabling
-Wdeclaration-after-statement with C99 and later.
However, the check for mixing declarations and code is not a constant time
algorithm, and therefore should be guarded with Diags.isIgnored().
Furthermore, improve test coverage with: non-pedantic C89 with the
warning; C11 with the warning; and when using -Wall.
Finally, mention the changed behaviour in ReleaseNotes.rst.
Reviewed By: aaron.ballman
Differential Revision: https://reviews.llvm.org/D117232
39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
/* RUN: %clang_cc1 -fsyntax-only -verify -std=c89 -pedantic %s
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*/
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/* RUN: %clang_cc1 -fsyntax-only -verify -std=c89 -Wdeclaration-after-statement %s
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*/
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/* RUN: %clang_cc1 -fsyntax-only -verify -std=c99 -Wdeclaration-after-statement %s
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*/
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/* RUN: %clang_cc1 -fsyntax-only -verify -std=c11 -Wdeclaration-after-statement %s
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*/
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/* Should not emit diagnostic when not pedantic, not enabled or in C++ Code*/
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/* RUN: %clang_cc1 -fsyntax-only -verify=none -std=c89 %s
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*/
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/* RUN: %clang_cc1 -fsyntax-only -verify=none -std=c99 %s
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*/
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/* RUN: %clang_cc1 -fsyntax-only -verify=none -std=c89 -Wall %s
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*/
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/* RUN: %clang_cc1 -fsyntax-only -verify=none -std=c99 -Wall -pedantic %s
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*/
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/* RUN: %clang_cc1 -fsyntax-only -verify=none -std=c11 -Wall -pedantic %s
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*/
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/* RUN: %clang_cc1 -fsyntax-only -verify=none -x c++ %s
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*/
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/* RUN: %clang_cc1 -fsyntax-only -verify=none -x c++ -Wdeclaration-after-statement %s
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*/
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/* none-no-diagnostics */
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int foo(int i)
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{
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i += 1;
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int f = i;
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#if __STDC_VERSION__ < 199901L
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/* expected-warning@-2 {{mixing declarations and code is a C99 extension}}*/
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#else
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/* expected-warning@-4 {{mixing declarations and code is incompatible with standards before C99}}*/
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#endif
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return f;
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}
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