| // 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 |
