1 // RUN: %clang_cc1 %s -fsyntax-only -std=c99 -pedantic -verify -Wundef 2 // RUN: %clang_cc1 %s -fsyntax-only -x c++ -pedantic -verify -Wundef 3 // RUN: not %clang_cc1 %s -fsyntax-only -std=c99 -pedantic -Wundef 2>&1 | FileCheck -strict-whitespace %s 4 5 #define \u00FC 6 #define a\u00FD() 0 7 #ifndef \u00FC 8 #error "This should never happen" 9 #endif 10 11 #if a\u00FD() 12 #error "This should never happen" 13 #endif 14 15 #if a\U000000FD() 16 #error "This should never happen" 17 #endif 18 19 #if \uarecool // expected-warning{{incomplete universal character name; treating as '\' followed by identifier}} expected-error {{invalid token at start of a preprocessor expression}} 20 #endif 21 #if \uwerecool // expected-warning{{\u used with no following hex digits; treating as '\' followed by identifier}} expected-error {{invalid token at start of a preprocessor expression}} 22 #endif 23 #if \U0001000 // expected-warning{{incomplete universal character name; treating as '\' followed by identifier}} expected-error {{invalid token at start of a preprocessor expression}} 24 #endif 25 26 // Make sure we reject disallowed UCNs 27 #define \ufffe // expected-error {{macro name must be an identifier}} 28 #define \U10000000 // expected-error {{macro name must be an identifier}} 29 #define \u0061 // expected-error {{character 'a' cannot be specified by a universal character name}} expected-error {{macro name must be an identifier}} 30 31 #define a\u0024 32 33 #if \u0110 // expected-warning {{is not defined, evaluates to 0}} 34 #endif 35 36 37 #define \u0110 1 / 0 38 #if \u0110 // expected-error {{division by zero in preprocessor expression}} 39 #endif 40 41 #define STRINGIZE(X) # X 42 43 extern int check_size[sizeof(STRINGIZE(\u0112)) == 3 ? 1 : -1]; 44 45 // Check that we still diagnose disallowed UCNs in #if 0 blocks. 46 // C99 5.1.1.2p1 and C++11 [lex.phases]p1 dictate that preprocessor tokens are 47 // formed before directives are parsed. 48 // expected-error@+4 {{character 'a' cannot be specified by a universal character name}} 49 #if 0 50 #define \ufffe // okay 51 #define \U10000000 // okay 52 #define \u0061 // error, but -verify only looks at comments outside #if 0 53 #endif 54 55 56 // A UCN formed by token pasting is undefined in both C99 and C++. 57 // Right now we don't do anything special, which causes us to coincidentally 58 // accept the first case below but reject the second two. 59 #define PASTE(A, B) A ## B 60 extern int PASTE(\, u00FD); 61 extern int PASTE(\u, 00FD); // expected-warning{{\u used with no following hex digits}} 62 extern int PASTE(\u0, 0FD); // expected-warning{{incomplete universal character name}} 63 #ifdef __cplusplus 64 // expected-error@-3 {{expected unqualified-id}} 65 // expected-error@-3 {{expected unqualified-id}} 66 #else 67 // expected-error@-6 {{expected identifier}} 68 // expected-error@-6 {{expected identifier}} 69 #endif 70 71 72 // A UCN produced by line splicing is valid in C99 but undefined in C++. 73 // Since undefined behavior can do anything including working as intended, 74 // we just accept it in C++ as well.; 75 #define newline_1_\u00F\ 76 C 1 77 #define newline_2_\u00\ 78 F\ 79 C 1 80 #define newline_3_\u\ 81 00\ 82 FC 1 83 #define newline_4_\\ 84 u00FC 1 85 #define newline_5_\\ 86 u\ 87 \ 88 0\ 89 0\ 90 F\ 91 C 1 92 93 #if (newline_1_\u00FC && newline_2_\u00FC && newline_3_\u00FC && \ 94 newline_4_\u00FC && newline_5_\u00FC) 95 #else 96 #error "Line splicing failed to produce UCNs" 97 #endif 98 99 100 #define capital_u_\U00FC 101 // expected-warning@-1 {{incomplete universal character name}} expected-note@-1 {{did you mean to use '\u'?}} expected-warning@-1 {{whitespace}} 102 // CHECK: note: did you mean to use '\u'? 103 // CHECK-NEXT: #define capital_u_\U00FC 104 // CHECK-NEXT: {{^ \^}} 105 // CHECK-NEXT: {{^ u}} 106