1 // RUN: %clang_cc1 -x c -std=c2x -fsyntax-only -verify %s 2 // RUN: %clang_cc1 -x c -std=c2x -E -DPP_ONLY=1 %s | FileCheck %s --strict-whitespace 3 4 /* WG14 N2836: Clang 15 5 * Identifier Syntax using Unicode Standard Annex 31 6 */ 7 8 /* WG14 N2939: Clang 15 9 * Identifier Syntax Fixes 10 */ 11 12 // Some of the tests below are derived from clang/test/Lexer/unicode.c. 13 14 // This file contains Unicode characters; please do not "fix" them! 15 16 // No diagnostics for pragma directives. 17 #pragma mark ¡Unicode! 18 19 // lone non-identifier characters are allowed in preprocessing. 20 #define COPYRIGHT Copyright © 2012 21 #define XSTR(X) #X 22 #define STR(X) XSTR(X) 23 24 static const char *copyright = STR(COPYRIGHT); // no-warning 25 // CHECK: static const char *copyright = "Copyright © {{2012}}"; 26 27 #if PP_ONLY 28 COPYRIGHT 29 // CHECK: Copyright © {{2012}} 30 #endif 31 32 // The characters in the following identifiers are no longer valid as either 33 // start or continuation characters as of C23. These are taken from section 1 34 // of N2836. 35 extern int \N{CONSTRUCTION WORKER}; // expected-error {{expected identifier or '('}} 36 extern int X\N{CONSTRUCTION WORKER}; // expected-error {{character <U+1F477> not allowed in an identifier}} 37 extern int \U0001F477; // expected-error {{expected identifier or '('}} 38 extern int X\U0001F477; // expected-error {{character <U+1F477> not allowed in an identifier}} 39 extern int ��; // expected-error {{unexpected character <U+1F477>}} \ 40 // expected-warning {{declaration does not declare anything}} 41 extern int X��; // expected-error {{character <U+1F477> not allowed in an identifier}} 42 extern int ��; // expected-error {{unexpected character <U+1F550>}} \ 43 // expected-warning {{declaration does not declare anything}} 44 extern int X��; // expected-error {{character <U+1F550> not allowed in an identifier}} 45 extern int ��; // expected-error {{unexpected character <U+1F480>}} \ 46 // expected-warning {{declaration does not declare anything}} 47 extern int X��; // expected-error {{character <U+1F480> not allowed in an identifier}} 48 extern int ��; // expected-error {{unexpected character <U+1F44A>}} \ 49 // expected-warning {{declaration does not declare anything}} 50 extern int X��; // expected-error {{character <U+1F44A> not allowed in an identifier}} 51 extern int ��; // expected-error {{unexpected character <U+1F680>}} \ 52 // expected-warning {{declaration does not declare anything}} 53 extern int X��; // expected-error {{character <U+1F680> not allowed in an identifier}} 54 extern int ��; // expected-error {{unexpected character <U+1F600>}} \ 55 // expected-warning {{declaration does not declare anything}} 56 extern int X��; // expected-error {{character <U+1F600> not allowed in an identifier}} 57 58 // The characters in the following identifiers are not allowed as start 59 // characters, but are allowed as continuation characters. 60 extern int \N{ARABIC-INDIC DIGIT ZERO}; // expected-error {{expected identifier or '('}} 61 extern int X\N{ARABIC-INDIC DIGIT ZERO}; 62 extern int \u0661; // expected-error {{expected identifier or '('}} 63 extern int X\u0661; 64 extern int ٢; // expected-error {{character <U+0662> not allowed at the start of an identifier}} \\ 65 // expected-warning {{declaration does not declare anything}} 66 extern int X٠; 67 68 // The characters in the following identifiers are not valid start or 69 // continuation characters in the standard, but are accepted as a conforming 70 // extension. 71 extern int \N{SUPERSCRIPT ZERO}; // expected-error {{expected identifier or '('}} 72 extern int X\N{SUPERSCRIPT ZERO}; // expected-warning {{mathematical notation character <U+2070> in an identifier is a Clang extension}} 73 extern int \u00B9; // expected-error {{expected identifier or '('}} 74 extern int X\u00B9; // expected-warning {{mathematical notation character <U+00B9> in an identifier is a Clang extension}} 75 extern int ²; // expected-error {{character <U+00B2> not allowed at the start of an identifier}} \\ 76 // expected-warning {{declaration does not declare anything}} 77 extern int X²; // expected-warning {{mathematical notation character <U+00B2> in an identifier is a Clang extension}} 78 extern int \N{PARTIAL DIFFERENTIAL}; // expected-warning {{mathematical notation character <U+2202> in an identifier is a Clang extension}} 79 extern int X\N{PARTIAL DIFFERENTIAL}; // expected-warning {{mathematical notation character <U+2202> in an identifier is a Clang extension}} 80 extern int \u2207; // expected-warning {{mathematical notation character <U+2207> in an identifier is a Clang extension}} 81 extern int X\u2207; // expected-warning {{mathematical notation character <U+2207> in an identifier is a Clang extension}} 82 extern int ∞; // expected-warning {{mathematical notation character <U+221E> in an identifier is a Clang extension}} 83 extern int X∞; // expected-warning {{mathematical notation character <U+221E> in an identifier is a Clang extension}} 84