efriedma-quic wrote:
Looking a bit more, I'm not sure I buy the premise that we don't need to mangle
lambdas written in unevaluated contexts. Consider the following related
example:
```
template<class Tp>
using simd_vector = Tp;
template<class VecT>
using simd_vector_underlying_type_t
= decltype([]<class Tp>(simd_vector<Tp>) { return 3; });
template<class VecT>
auto temp() {
return [](simd_vector_underlying_type_t<VecT> x) { return x(10); };
}
int call() {
return temp<simd_vector<char>>()({});
}
```
Both gcc and MSVC seem perfectly happy with this.
https://github.com/llvm/llvm-project/pull/124572
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