1 | // RUN: %clang_cc1 -fsyntax-only -std=c++14 -verify -fms-extensions %s -Wno-deprecated-declarations |
2 | |
3 | typedef struct _GUID { |
4 | unsigned long Data1; |
5 | unsigned short Data2; |
6 | unsigned short Data3; |
7 | unsigned char Data4[8]; |
8 | } GUID; |
9 | |
10 | namespace { |
11 | // cl.exe supports [] attributes on decls like so: |
12 | [uuid( "000000A0-0000-0000-C000-000000000049" )] struct struct_with_uuid; |
13 | |
14 | // Optionally, the uuid can be surrounded by one set of braces. |
15 | [uuid( |
16 | "{000000A0-0000-0000-C000-000000000049}" |
17 | )] struct struct_with_uuid_brace; |
18 | |
19 | // uuids must be ascii string literals. |
20 | // expected-error@+1 {{uuid attribute contains a malformed GUID}} |
21 | [uuid(u8"000000A0-0000-0000-C000-000000000049")] struct struct_with_uuid_u8; |
22 | // expected-error@+1 {{uuid attribute contains a malformed GUID}} |
23 | [uuid(L"000000A0-0000-0000-C000-000000000049")] struct struct_with_uuid_L; |
24 | |
25 | // cl.exe doesn't allow raw string literals in []-style attributes, but does |
26 | // allow it for __declspec(uuid()) (u8 literals etc are not allowed there |
27 | // either). Since raw string literals not being allowed seems like an |
28 | // implementation artifact in cl and not allowing them makes the parse code |
29 | // a bit unnatural, do allow this. |
30 | [uuid(R"(000000A0-0000-0000-C000-000000000049)")] struct struct_with_uuid_raw; |
31 | |
32 | // Likewise, cl supports UCNs in declspec uuid, but not in []-style uuid. |
33 | // clang-cl allows them in both. |
34 | [uuid("000000A0-0000\u002D0000-C000-000000000049")] struct struct_with_uuid_ucn; |
35 | |
36 | // cl doesn't allow string concatenation in []-style attributes, for no good |
37 | // reason. clang-cl allows them. |
38 | [uuid("000000A0-00" "00-0000-C000-000000000049")] struct struct_with_uuid_split; |
39 | |
40 | // expected-error@+1 {{expected ')'}} expected-note@+1 {{to match this '('}} |
41 | [uuid("{000000A0-0000-0000-C000-000000000049}", "1")] struct S {}; |
42 | // expected-error@+1 {{expected '('}} |
43 | [uuid{"000000A0-0000-0000-C000-000000000049"}] struct T {}; |
44 | // expected-error@+1 {{expected ')'}} expected-note@+1 {{to match this '('}} |
45 | [uuid("000000A0-0000-0000-C000-000000000049"}] struct U {}; |
46 | |
47 | |
48 | // In addition to uuids in string literals, cl also allows uuids that are not |
49 | // in a string literal, only delimited by (). The contents of () are almost |
50 | // treated like a literal (spaces there aren't ignored), but macro substitution, |
51 | // \ newline escapes, and so on are performed. |
52 | |
53 | [ uuid (000000A0-0000-0000-C000-000000000049) ] struct struct_with_uuid2; |
54 | [uuid({000000A0-0000-0000-C000-000000000049})] struct struct_with_uuid2_brace; |
55 | |
56 | // The non-quoted form doesn't allow any whitespace inside the parens: |
57 | // expected-error@+1 {{uuid attribute contains a malformed GUID}} |
58 | [uuid( 000000A0-0000-0000-C000-000000000049)] struct struct_with_uuid2; |
59 | // expected-error@+1 {{uuid attribute contains a malformed GUID}} |
60 | [uuid(000000A0-0000 -0000-C000-000000000049)] struct struct_with_uuid2; |
61 | // expected-error@+2 {{uuid attribute contains a malformed GUID}} |
62 | [uuid(000000A0-0000 |
63 | -0000-C000-000000000049)] struct struct_with_uuid2; |
64 | // expected-error@+1 {{uuid attribute contains a malformed GUID}} |
65 | [uuid(000000A0-0000/**/-0000-C000-000000000049)] struct struct_with_uuid2; |
66 | // expected-error@+1 {{uuid attribute contains a malformed GUID}} |
67 | [uuid(000000A0-0000-0000-C000-000000000049 )] struct struct_with_uuid2; |
68 | // expected-error@+2 {{uuid attribute contains a malformed GUID}} |
69 | [uuid(000000A0-0000-0000-C000-000000000049 |
70 | ) |
71 | ] struct struct_with_uuid2; |
72 | // expected-error@+1 {{uuid attribute contains a malformed GUID}} |
73 | [uuid({000000A0-0000-""0000-C000-000000000049})] struct struct_with_uuid2; |
74 | |
75 | // Line continuations and macro substitution are fine though: |
76 | [uuid(000000A0-0000-0000-\ |
77 | C000-000000000049)] struct struct_with_uuid2_cont; |
78 | #define UUID 000000A0-0000-0000-C000-000000000049 |
79 | #define UUID_PART 000000A0-0000 |
80 | [uuid(UUID)] struct struct_with_uuid2_macro; |
81 | [uuid(UUID_PART-0000-C000-000000000049)] struct struct_with_uuid2_macro_part; |
82 | |
83 | // Both cl and clang-cl accept trigraphs here (with /Zc:trigraphs, off by |
84 | // default) |
85 | // expected-warning@+1 2{{trigraph converted}} |
86 | [uuid(??<000000A0-0000-0000-C000-000000000049??>)] |
87 | struct struct_with_uuid2_trigraph; |
88 | |
89 | // UCNs cannot be used in this form because they're prohibited by C99. |
90 | // expected-error@+1 {{character '-' cannot be specified by a universal character name}} |
91 | [uuid(000000A0-0000\u002D0000-C000-000000000049)] struct struct_with_uuid2_ucn; |
92 | |
93 | // Invalid digits. |
94 | // expected-error@+1 {{uuid attribute contains a malformed GUID}} |
95 | [uuid(0Z0000A0-0000-0000-C000-000000000049)] struct struct_with_uuid2; |
96 | |
97 | struct OuterClass { |
98 | // [] uuids and inner classes are weird in cl.exe: It warns that uuid on |
99 | // nested types has undefined behavior, and errors out __uuidof() claiming |
100 | // that the inner type has no assigned uuid. Things work fine if __declspec() |
101 | // is used instead. clang-cl handles this fine. |
102 | [uuid(10000000-0000-0000-0000-000000000000)] class InnerClass1; |
103 | [uuid(10000000-0000-0000-0000-000000000000)] class InnerClass2 {} ic; |
104 | [uuid(10000000-0000-0000-0000-000000000000)] static class InnerClass3 {} sic; |
105 | // Putting `static` in front of [...] causes parse errors in both cl and clang |
106 | |
107 | // This is the only syntax to declare an inner class with []-style attributes |
108 | // that works in cl: Declare the inner class without an attribute, and then |
109 | // have the []-style attribute on the definition. |
110 | class InnerClass; |
111 | }; |
112 | [uuid(10000000-0000-0000-0000-000000000000)] class OuterClass::InnerClass {}; |
113 | |
114 | void use_it() { |
115 | (void)__uuidof(struct_with_uuid); |
116 | (void)__uuidof(struct_with_uuid_brace); |
117 | (void)__uuidof(struct_with_uuid_raw); |
118 | (void)__uuidof(struct_with_uuid_ucn); |
119 | (void)__uuidof(struct_with_uuid_split); |
120 | |
121 | (void)__uuidof(struct_with_uuid2); |
122 | (void)__uuidof(struct_with_uuid2_brace); |
123 | (void)__uuidof(struct_with_uuid2_cont); |
124 | (void)__uuidof(struct_with_uuid2_macro); |
125 | (void)__uuidof(struct_with_uuid2_macro_part); |
126 | (void)__uuidof(struct_with_uuid2_trigraph); |
127 | |
128 | (void)__uuidof(OuterClass::InnerClass); |
129 | (void)__uuidof(OuterClass::InnerClass1); |
130 | (void)__uuidof(OuterClass::InnerClass2); |
131 | (void)__uuidof(OuterClass::InnerClass3); |
132 | (void)__uuidof(OuterClass().ic); |
133 | (void)__uuidof(OuterClass::sic); |
134 | } |
135 | |
136 | // expected-warning@+1 {{'uuid' attribute only applies to structs, unions, classes, and enums}} |
137 | [uuid("000000A0-0000-0000-C000-000000000049")] void f(); |
138 | } |
139 | |
140 | // clang supports these on toplevel decls, but not on local decls since this |
141 | // syntax is ambiguous with lambdas and Objective-C message send expressions. |
142 | // This file documents clang's shortcomings and lists a few constructs that |
143 | // one has to keep in mind when trying to fix this. System headers only seem |
144 | // to use these attributes on toplevel decls, so supporting this is not very |
145 | // important. |
146 | |
147 | void local_class() { |
148 | // FIXME: MSVC accepts, but we reject due to ambiguity. |
149 | // expected-error@+1 {{expected body of lambda expression}} |
150 | [uuid("a5a7bd07-3b14-49bc-9399-de066d4d72cd")] struct Local { |
151 | int x; |
152 | }; |
153 | } |
154 | |
155 | void useit(int); |
156 | int lambda() { |
157 | int uuid = 42; |
158 | [uuid]() { useit(uuid); }(); |
159 | |
160 | // C++14 lambda init captures: |
161 | [uuid(00000000-0000-0000-0000-000000000000)] { return uuid; }(); |
162 | [uuid("00000000-0000-0000-0000-000000000000")](int n) { return uuid[n]; }(3); |
163 | } |
164 | |
165 | @interface NSObject |
166 | - (void)retain; |
167 | @end |
168 | int message_send(id uuid) { |
169 | [uuid retain]; |
170 | } |
171 | NSObject* uuid(const char*); |
172 | int message_send2() { |
173 | [uuid("a5a7bd07-3b14-49bc-9399-de066d4d72cd") retain]; |
174 | } |
175 | |