llvm-project/ms-iunknown-outofline-def.cpp at 761787d42576751afbaaba5107233ee849f81b6f - llvm-project - Gitea For EOELAB

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Erich Keane 58bd603109 Fix the __interface inheritence rules to work better with IUnknown and IDispatch

__interface objects in MSVC are permitted to inherit from __interface types, 
and interface-like types.

Additionally, there are two default interface-like types 
(IUnknown and IDispatch) that all interface-like
types must inherit from.

Differential Revision: https://reviews.llvm.org/D37308

llvm-svn: 313364

2017-09-15 16:03:35 +00:00

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 // RUN: %clang_cc1 -fsyntax-only -verify -fms-extensions %s
 struct __declspec(uuid("00000000-0000-0000-C000-000000000046")) IUnknown {
   void foo();
 };
 __interface NoError : public IUnknown {};
 void IUnknown::foo() {}
 // expected-error@+1{{interface type cannot inherit from}}
 __interface HasError : public IUnknown {};