http://llvm.org/bugs/show_bug.cgi?id=10947
Summary: Discriminated unions miss move operations
Product: clang
Version: trunk
Platform: PC
OS/Version: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: C++0x
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
According to [class.union]p2, a discriminated union cannot contain and move
constructors or move assignments. However, the following code will compile:
// RUN: %clang_cc1 -fsyntax-only -verify -std=c++0x %s
void abort() __attribute__((noreturn));
class clsMC { // expected-note {{because type 'clsMC' has a user-defined
move constructor}}
public:
clsMC( const clsMC&& rhs ) { abort(); }
};
class clsMA { // expected-note {{because type 'clsMA' has a user-defined
move assignment operator}}
public:
clsMA&& operator= (clsMA&& rhs) { abort(); }
};
union u {
clsMC a; // expected-error {{union member 'a' has a non-trivial move
constructor}}
clsMA b; // expected-error {{union member 'b' has a non-trivial move
assignment operator}}
};
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