| Issue |
98878
|
| Summary |
False positive of -Wunused-local-typedef in dependent code.
|
| Labels |
clang:frontend
|
| Assignees |
|
| Reporter |
hokein
|
Given the following code:
```
#define TYPE_OR_NONTYPE typename
template<TYPE_OR_NONTYPE T>
struct BaseT {
static int ff();
void Foo();
};
template<TYPE_OR_NONTYPE T>
struct DerivedT : BaseT<T> {
void Inner();
};
template<TYPE_OR_NONTYPE T>
void DerivedT<T>::Inner() {
using K = BaseT<T>;
this->K::Foo();
}
```
clang emits a unused typedef warning.
```
⇒ ./bin/clang -Xclang -fsyntax-only -Wunused-local-typedef --std=c++20 /tmp/t2.cpp
/tmp/t2.cpp:15:9: warning: unused type alias 'K' [-Wunused-local-typedef]
15 | using K = BaseT<T>;
|
```
This is shown in https://github.com/abseil/abseil-cpp/pull/1711.
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