1 // RUN: %clang_cc1 -fsyntax-only -std=c++14 -verify -fms-extensions %s -Wno-deprecated-declarations
7 unsigned char Data4[8];
11 // cl.exe supports [] attributes on decls like so:
12 [uuid( "000000A0-0000-0000-C000-000000000049" )] struct struct_with_uuid;
14 // Optionally, the uuid can be surrounded by one set of braces.
16 "{000000A0-0000-0000-C000-000000000049}"
17 )] struct struct_with_uuid_brace;
19 // uuids must be ascii string literals.
20 // expected-warning@+1 {{encoding prefix 'u8' on an unevaluated string literal has no effect and is incompatible with c++2c}}
21 [uuid(u8"000000A0-0000-0000-C000-000000000049")] struct struct_with_uuid_u8;
22 // expected-warning@+1 {{encoding prefix 'L' on an unevaluated string literal has no effect and is incompatible with c++2c}}
23 [uuid(L"000000A0-0000-0000-C000-000000000049")] struct struct_with_uuid_L;
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;
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;
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;
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 {};
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.
53 [ uuid (000000A0-0000-0000-C000-000000000049) ] struct struct_with_uuid2;
54 [uuid({000000A0-0000-0000-C000-000000000049})] struct struct_with_uuid2_brace;
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}}
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
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;
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;
83 // Both cl and clang-cl accept trigraphs here (with /Zc:trigraphs, off by
85 // expected-warning@+1 2{{trigraph converted}}
86 [uuid(??<000000A0-0000-0000-C000-000000000049??>)]
87 struct struct_with_uuid2_trigraph;
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;
94 // expected-error@+1 {{uuid attribute contains a malformed GUID}}
95 [uuid(0Z0000A0-0000-0000-C000-000000000049)] struct struct_with_uuid2;
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
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.
112 [uuid(10000000-0000-0000-0000-000000000000)] class OuterClass::InnerClass {};
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);
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);
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);
136 // expected-warning@+1 {{'uuid' attribute only applies to structs, unions, classes, and enums}}
137 [uuid("000000A0-0000-0000-C000-000000000049")] void f();
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
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 {
158 [uuid]() { useit(uuid); }();
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);
168 int message_send(id uuid) {
171 NSObject* uuid(const char*);
172 int message_send2() {
173 [uuid("a5a7bd07-3b14-49bc-9399-de066d4d72cd") retain];