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 | // FIXME: Not clear what our behavior should be here; \u0024 is "$". |
32 | #define a\u0024 // expected-warning {{whitespace}} |
33 | |
34 | #if \u0110 // expected-warning {{is not defined, evaluates to 0}} |
35 | #endif |
36 | |
37 | |
38 | #define \u0110 1 / 0 |
39 | #if \u0110 // expected-error {{division by zero in preprocessor expression}} |
40 | #endif |
41 | |
42 | #define STRINGIZE(X) # X |
43 | |
44 | extern int check_size[sizeof(STRINGIZE(\u0112)) == 3 ? 1 : -1]; |
45 | |
46 | // Check that we still diagnose disallowed UCNs in #if 0 blocks. |
47 | // C99 5.1.1.2p1 and C++11 [lex.phases]p1 dictate that preprocessor tokens are |
48 | // formed before directives are parsed. |
49 | // expected-error@+4 {{character 'a' cannot be specified by a universal character name}} |
50 | #if 0 |
51 | #define \ufffe // okay |
52 | #define \U10000000 // okay |
53 | #define \u0061 // error, but -verify only looks at comments outside #if 0 |
54 | #endif |
55 | |
56 | |
57 | // A UCN formed by token pasting is undefined in both C99 and C++. |
58 | // Right now we don't do anything special, which causes us to coincidentally |
59 | // accept the first case below but reject the second two. |
60 | #define PASTE(A, B) A ## B |
61 | extern int PASTE(\, u00FD); |
62 | extern int PASTE(\u, 00FD); // expected-warning{{\u used with no following hex digits}} |
63 | extern int PASTE(\u0, 0FD); // expected-warning{{incomplete universal character name}} |
64 | #ifdef __cplusplus |
65 | // expected-error@-3 {{expected unqualified-id}} |
66 | // expected-error@-3 {{expected unqualified-id}} |
67 | #else |
68 | // expected-error@-6 {{expected identifier}} |
69 | // expected-error@-6 {{expected identifier}} |
70 | #endif |
71 | |
72 | |
73 | // A UCN produced by line splicing is valid in C99 but undefined in C++. |
74 | // Since undefined behavior can do anything including working as intended, |
75 | // we just accept it in C++ as well.; |
76 | #define newline_1_\u00F\ |
77 | C 1 |
78 | #define newline_2_\u00\ |
79 | F\ |
80 | C 1 |
81 | #define newline_3_\u\ |
82 | 00\ |
83 | FC 1 |
84 | #define newline_4_\\ |
85 | u00FC 1 |
86 | #define newline_5_\\ |
87 | u\ |
88 | \ |
89 | 0\ |
90 | 0\ |
91 | F\ |
92 | C 1 |
93 | |
94 | #if (newline_1_\u00FC && newline_2_\u00FC && newline_3_\u00FC && \ |
95 | newline_4_\u00FC && newline_5_\u00FC) |
96 | #else |
97 | #error "Line splicing failed to produce UCNs" |
98 | #endif |
99 | |
100 | |
101 | #define capital_u_\U00FC |
102 | // expected-warning@-1 {{incomplete universal character name}} expected-note@-1 {{did you mean to use '\u'?}} expected-warning@-1 {{whitespace}} |
103 | // CHECK: note: did you mean to use '\u'? |
104 | // CHECK-NEXT: #define capital_u_\U00FC |
105 | // CHECK-NEXT: {{^ \^}} |
106 | // CHECK-NEXT: {{^ u}} |
107 | |