https://llvm.org/bugs/show_bug.cgi?id=25483
Bug ID: 25483
Summary: Injected base class name not available when CRTP base
class is instantiated using a subclass that is itself
a template instantiation.
Product: clang
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: unassignedclangb...@nondot.org
Reporter: paul.ryan.har...@gmail.com
CC: dgre...@apple.com, llvm-bugs@lists.llvm.org
Classification: Unclassified
An injected base class name is not available to be used as a constructor when a
CRTP base class is instantiated using a subclass that is itself a template
instantiation.
The following works as expected:
template <typename>
struct A {};
struct B : public A<B> {
B() : A() {}
};
int main()
{
B b;
}
The following results in: error: member initializer 'A' does not name a
non-static data member or base class
template <typename>
struct A {};
template <typename T>
struct B : public A<B<T>> {
B() : A() {}
};
int main()
{
B<void> b;
}
The following workaround is available:
template <typename T>
struct B : public A<B<T>> {
using A = A<B>;
B() : A() {}
};
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