Author: Aaron Ballman Date: 2025-04-01T11:45:56-04:00 New Revision: 66b540d861ecc5fef0fc398c9c3590c3a7dc6ff9
URL: https://github.com/llvm/llvm-project/commit/66b540d861ecc5fef0fc398c9c3590c3a7dc6ff9 DIFF: https://github.com/llvm/llvm-project/commit/66b540d861ecc5fef0fc398c9c3590c3a7dc6ff9.diff LOG: [C11] Claim conformance to WG14 N1518 (#133749) This paper introduced ranges of valid start and continuation characters for identifiers. C23 made further changes to these sets. Added: clang/test/C/C11/n1518.c Modified: clang/www/c_status.html Removed: ################################################################################ diff --git a/clang/test/C/C11/n1518.c b/clang/test/C/C11/n1518.c new file mode 100644 index 0000000000000..e950d22b20cf9 --- /dev/null +++ b/clang/test/C/C11/n1518.c @@ -0,0 +1,24 @@ +// RUN: %clang_cc1 -verify=c11,both -std=c11 %s +// RUN: %clang_cc1 -verify=c23,both -std=c23 %s + +/* WG14 N1518: Clang 15 + * Recommendations for extended identifier characters for C and C++ + * + * This paper effectively adopts UAX #31, which was later officially adopted + * for C23 via WG14 N2836 and supersedes N1518. + */ + +// This file takes test cases from clang/test/C/C23/n2836_n2939.c. +// This file contains Unicode characters; please do not "fix" them! + +// This was fine in C11, is now an error in C23. +extern int ٢; // c23-error {{character <U+0662> not allowed at the start of an identifier}} \ + c23-warning {{declaration does not declare anything}} + +// This was an error in C11 but is an extension in C23. +extern int ∞; // c11-error {{unexpected character <U+221E>}} \ + c11-warning {{declaration does not declare anything}} \ + c23-warning {{mathematical notation character <U+221E> in an identifier is a Clang extension}} + +int \u1DC0; // both-error {{expected identifier or '('}} +int e\u1DC0; // Ok diff --git a/clang/www/c_status.html b/clang/www/c_status.html index f4f00ac6dd808..8434ed9ecf6f8 100644 --- a/clang/www/c_status.html +++ b/clang/www/c_status.html @@ -1105,7 +1105,7 @@ <h2 id="c11">C11 implementation status</h2> <tr> <td>Recommendations for extended identifier characters for C and C++</td> <td><a href="https://www.open-std.org/jtc1/sc22/wg14/www/docs/n1518.htm";>N1518</a></td> - <td class="unknown" align="center">Unknown</td> + <td class="full" align="center">Clang 15</td> </tr> <tr> <td>Atomic C1x/C++0x compatibility refinements (1st part only)</td> _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
