Author: Aaron Ballman Date: 2025-03-06T16:21:40-05:00 New Revision: f3effc24004a99c6167680a66b1f95bde3c268f4
URL: https://github.com/llvm/llvm-project/commit/f3effc24004a99c6167680a66b1f95bde3c268f4 DIFF: https://github.com/llvm/llvm-project/commit/f3effc24004a99c6167680a66b1f95bde3c268f4.diff LOG: [C2y] Claim conformance to N3347 This paper made it a constraint violation to have a tentative definition with internal linkage which is not completed by the end of the translation unit. This has been diagnosed as an error since at least Clang 3.0, so no changes are needed. Added: clang/test/C/C2y/n3347.c Modified: clang/www/c_status.html Removed: ################################################################################ diff --git a/clang/test/C/C2y/n3347.c b/clang/test/C/C2y/n3347.c new file mode 100644 index 0000000000000..ed816f3941725 --- /dev/null +++ b/clang/test/C/C2y/n3347.c @@ -0,0 +1,23 @@ +// RUN: %clang_cc1 -verify -std=c2y -Wall -pedantic %s + +/* WG14 N3347: Yes + * Slay Some Earthly Demons IX + * + * Declarations of a tentative definition with internal linkage must be + * complete by the end of the translation unit. + */ + +struct foo; // #foo +static struct foo f1; /* expected-warning {{tentative definition of variable with internal linkage has incomplete non-array type 'struct foo'}} + expected-error {{tentative definition has type 'struct foo' that is never completed}} + expected-note@#foo 2 {{forward declaration of 'struct foo'}} + */ + +extern struct foo f2; // Ok, does not have internal linkage + +struct bar; // #bar +static struct bar b; /* expected-warning {{tentative definition of variable with internal linkage has incomplete non-array type 'struct bar'}} + expected-note@#bar {{forward declaration of 'struct bar'}} + */ +struct bar { int x; }; + diff --git a/clang/www/c_status.html b/clang/www/c_status.html index 41643f6d13913..4e912987b69c6 100644 --- a/clang/www/c_status.html +++ b/clang/www/c_status.html @@ -258,7 +258,7 @@ <h2 id="c2y">C2y implementation status</h2> <tr> <td>Slay Some Earthly Demons IX</td> <td><a href="https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3347.pdf";>N3347</a></td> - <td class="unknown" align="center">Unknown</td> + <td class="full" align="center">Yes</td> </tr> <tr> <td>stdarg.h wording... v3</td> _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
