forked from OSchip/llvm-project
96 lines
4.4 KiB
C++
96 lines
4.4 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify -fms-extensions %s -Wno-deprecated-declarations
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typedef struct _GUID {
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unsigned long Data1;
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unsigned short Data2;
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unsigned short Data3;
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unsigned char Data4[8];
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} GUID;
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namespace {
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// cl.exe's behavior with merging uuid attributes is a bit erratic:
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// * In []-style attributes, a single [] list must not list a duplicate uuid
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// (even if it's the same uuid), and only a single declaration of a class
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// must have a uuid else the compiler errors out (even if two declarations of
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// a class have the same uuid).
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// * For __declspec(uuid(...)), it's ok if several declarations of a class have
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// an uuid, as long as it's the same uuid each time. If uuids on declarations
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// don't match, the compiler errors out.
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// * If there are several __declspec(uuid(...))s on one declaration, the
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// compiler only warns about this and uses the last uuid. It even warns if
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// the uuids are the same.
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// clang-cl implements the following simpler (but largely compatible) behavior
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// instead:
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// * [] and __declspec uuids have the same behavior.
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// * If there are several uuids on a a class (no matter if on the same decl or
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// on several decls), it is an error if they don't match.
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// * Having several uuids that match is ok.
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// Both cl and clang-cl accept this:
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class __declspec(uuid("000000A0-0000-0000-C000-000000000049")) C1;
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class __declspec(uuid("000000a0-0000-0000-c000-000000000049")) C1;
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class __declspec(uuid("{000000a0-0000-0000-C000-000000000049}")) C1;
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class __declspec(uuid("000000A0-0000-0000-C000-000000000049")) C1 {};
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// Both cl and clang-cl error out on this:
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// expected-note@+1 2{{previous uuid specified here}}
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class __declspec(uuid("000000A0-0000-0000-C000-000000000049")) C2;
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// expected-error@+1 {{uuid does not match previous declaration}}
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class __declspec(uuid("110000A0-0000-0000-C000-000000000049")) C2;
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// expected-error@+1 {{uuid does not match previous declaration}}
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class __declspec(uuid("220000A0-0000-0000-C000-000000000049")) C2 {};
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// expected-note@+1 {{previous uuid specified here}}
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class __declspec(uuid("000000A0-0000-0000-C000-000000000049")) C2_2;
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class C2_2;
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// expected-error@+1 {{uuid does not match previous declaration}}
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class __declspec(uuid("110000A0-0000-0000-C000-000000000049")) C2_2;
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// clang-cl accepts this, but cl errors out:
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[uuid("000000A0-0000-0000-C000-000000000049")] class C3;
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[uuid("000000A0-0000-0000-C000-000000000049")] class C3;
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[uuid("000000A0-0000-0000-C000-000000000049")] class C3 {};
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// Both cl and clang-cl error out on this (but for different reasons):
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// expected-note@+1 2{{previous uuid specified here}}
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[uuid("000000A0-0000-0000-C000-000000000049")] class C4;
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// expected-error@+1 {{uuid does not match previous declaration}}
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[uuid("110000A0-0000-0000-C000-000000000049")] class C4;
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// expected-error@+1 {{uuid does not match previous declaration}}
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[uuid("220000A0-0000-0000-C000-000000000049")] class C4 {};
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// Both cl and clang-cl error out on this:
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// expected-note@+1 {{previous uuid specified here}}
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class __declspec(uuid("000000A0-0000-0000-C000-000000000049"))
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// expected-error@+1 {{uuid does not match previous declaration}}
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__declspec(uuid("110000A0-0000-0000-C000-000000000049")) C5;
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// expected-note@+1 {{previous uuid specified here}}
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[uuid("000000A0-0000-0000-C000-000000000049"),
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// expected-error@+1 {{uuid does not match previous declaration}}
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uuid("110000A0-0000-0000-C000-000000000049")] class C6;
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// cl doesn't diagnose having one uuid each as []-style attributes and as
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// __declspec, even if the uuids differ. clang-cl errors if they differ.
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[uuid("000000A0-0000-0000-C000-000000000049")]
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class __declspec(uuid("000000A0-0000-0000-C000-000000000049")) C7;
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// expected-note@+1 {{previous uuid specified here}}
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[uuid("000000A0-0000-0000-C000-000000000049")]
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// expected-error@+1 {{uuid does not match previous declaration}}
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class __declspec(uuid("110000A0-0000-0000-C000-000000000049")) C8;
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// cl warns on this, but clang-cl is fine with it (which is consistent with
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// e.g. specifying __multiple_inheritance several times, which cl accepts
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// without warning too).
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class __declspec(uuid("000000A0-0000-0000-C000-000000000049"))
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__declspec(uuid("000000A0-0000-0000-C000-000000000049")) C9;
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// cl errors out on this, but clang-cl is fine with it (to be consistent with
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// the previous case).
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[uuid("000000A0-0000-0000-C000-000000000049"),
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uuid("000000A0-0000-0000-C000-000000000049")] class C10;
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}
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