http://llvm.org/bugs/show_bug.cgi?id=13493
Bug #: 13493
Summary: Explicitly defaulted constructors cannot be declared
constexpr
Product: clang
Version: trunk
Platform: PC
OS/Version: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: C++11
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
As per dcl.fct.def.default/3:
[ Example:
struct S {
constexpr S() = default; // ill-formed: implicit S() is not constexpr
S(int a = 0) = default; // ill-formed: default argument
void operator=(const S&) = default; // ill-formed: non-matching return type
~S() throw(int) = default; // ill-formed: exception specification does not
match
private:
int i;
S(S&); // OK: private copy constructor
};
S::S(S&) = default; // OK: defines copy constructor
Clang happily accepts a constexpr on an explicitly defaulted constructor:
struct A {
constexpr A() = default; // Should emit diagnostic
};
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