| 1 | // RUN: %clang_cc1 %s -fsyntax-only -std=c99 -pedantic -verify -Wundef |
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| 2 | // RUN: %clang_cc1 %s -fsyntax-only -x c++ -pedantic -verify -Wundef |
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| 3 | // RUN: not %clang_cc1 %s -fsyntax-only -std=c99 -pedantic -Wundef 2>&1 | FileCheck -strict-whitespace %s |
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| 4 | |
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| 5 | #define \u00FC |
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| 6 | #define a\u00FD() 0 |
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| 7 | #ifndef \u00FC |
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| 8 | #error "This should never happen" |
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| 9 | #endif |
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| 10 | |
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| 11 | #if a\u00FD() |
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| 12 | #error "This should never happen" |
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| 13 | #endif |
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| 14 | |
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| 15 | #if a\U000000FD() |
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| 16 | #error "This should never happen" |
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| 17 | #endif |
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| 18 | |
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| 19 | #if \uarecool // expected-warning{{incomplete universal character name; treating as '\' followed by identifier}} expected-error {{invalid token at start of a preprocessor expression}} |
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| 20 | #endif |
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| 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}} |
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| 22 | #endif |
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| 23 | #if \U0001000 // expected-warning{{incomplete universal character name; treating as '\' followed by identifier}} expected-error {{invalid token at start of a preprocessor expression}} |
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| 24 | #endif |
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| 25 | |
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| 26 | // Make sure we reject disallowed UCNs |
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| 27 | #define \ufffe // expected-error {{macro name must be an identifier}} |
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| 28 | #define \U10000000 // expected-error {{macro name must be an identifier}} |
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| 29 | #define \u0061 // expected-error {{character 'a' cannot be specified by a universal character name}} expected-error {{macro name must be an identifier}} |
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| 30 | |
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| 31 | // FIXME: Not clear what our behavior should be here; \u0024 is "$". |
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| 32 | #define a\u0024 // expected-warning {{whitespace}} |
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| 33 | |
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| 34 | #if \u0110 // expected-warning {{is not defined, evaluates to 0}} |
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| 35 | #endif |
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| 36 | |
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| 37 | |
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| 38 | #define \u0110 1 / 0 |
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| 39 | #if \u0110 // expected-error {{division by zero in preprocessor expression}} |
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| 40 | #endif |
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| 41 | |
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| 42 | #define STRINGIZE(X) # X |
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| 43 | |
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| 44 | extern int check_size[sizeof(STRINGIZE(\u0112)) == 3 ? 1 : -1]; |
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| 45 | |
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| 46 | // Check that we still diagnose disallowed UCNs in #if 0 blocks. |
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| 47 | // C99 5.1.1.2p1 and C++11 [lex.phases]p1 dictate that preprocessor tokens are |
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| 48 | // formed before directives are parsed. |
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| 49 | // expected-error@+4 {{character 'a' cannot be specified by a universal character name}} |
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| 50 | #if 0 |
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| 51 | #define \ufffe // okay |
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| 52 | #define \U10000000 // okay |
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| 53 | #define \u0061 // error, but -verify only looks at comments outside #if 0 |
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| 54 | #endif |
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| 55 | |
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| 56 | |
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| 57 | // A UCN formed by token pasting is undefined in both C99 and C++. |
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| 58 | // Right now we don't do anything special, which causes us to coincidentally |
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| 59 | // accept the first case below but reject the second two. |
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| 60 | #define PASTE(A, B) A ## B |
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| 61 | extern int PASTE(\, u00FD); |
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| 62 | extern int PASTE(\u, 00FD); // expected-warning{{\u used with no following hex digits}} |
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| 63 | extern int PASTE(\u0, 0FD); // expected-warning{{incomplete universal character name}} |
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| 64 | #ifdef __cplusplus |
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| 65 | // expected-error@-3 {{expected unqualified-id}} |
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| 66 | // expected-error@-3 {{expected unqualified-id}} |
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| 67 | #else |
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| 68 | // expected-error@-6 {{expected identifier}} |
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| 69 | // expected-error@-6 {{expected identifier}} |
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| 70 | #endif |
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| 71 | |
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| 72 | |
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| 73 | // A UCN produced by line splicing is valid in C99 but undefined in C++. |
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| 74 | // Since undefined behavior can do anything including working as intended, |
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| 75 | // we just accept it in C++ as well.; |
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| 76 | #define newline_1_\u00F\ |
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| 77 | C 1 |
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| 78 | #define newline_2_\u00\ |
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| 79 | F\ |
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| 80 | C 1 |
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| 81 | #define newline_3_\u\ |
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| 82 | 00\ |
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| 83 | FC 1 |
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| 84 | #define newline_4_\\ |
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| 85 | u00FC 1 |
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| 86 | #define newline_5_\\ |
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| 87 | u\ |
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| 88 | \ |
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| 89 | 0\ |
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| 90 | 0\ |
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| 91 | F\ |
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| 92 | C 1 |
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| 93 | |
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| 94 | #if (newline_1_\u00FC && newline_2_\u00FC && newline_3_\u00FC && \ |
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| 95 | newline_4_\u00FC && newline_5_\u00FC) |
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| 96 | #else |
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| 97 | #error "Line splicing failed to produce UCNs" |
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| 98 | #endif |
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| 99 | |
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| 100 | |
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| 101 | #define capital_u_\U00FC |
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| 102 | // expected-warning@-1 {{incomplete universal character name}} expected-note@-1 {{did you mean to use '\u'?}} expected-warning@-1 {{whitespace}} |
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| 103 | // CHECK: note: did you mean to use '\u'? |
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| 104 | // CHECK-NEXT: #define capital_u_\U00FC |
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| 105 | // CHECK-NEXT: {{^ \^}} |
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| 106 | // CHECK-NEXT: {{^ u}} |
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| 107 | |
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