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comparison clang/test/Preprocessor/ucn-pp-identifier.c @ 150:1d019706d866

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LLVM10
author anatofuz
date Thu, 13 Feb 2020 15:10:13 +0900
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children c4bab56944e8
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147:c2174574ed3a 150:1d019706d866
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}}