std::array and enum issue #20181
Description
// 2025-10-23
#ifndef RFOO
#define RFOO
// without effect
// #pragma link C++ enum Foo::EState;
// #pragma link C++ enum EState;
#include <array>
class Foo : public TObject {
public:
enum EState { kS1, kS2, kS3 };
Foo() = default;
~Foo() override = default;
private:
EState array[100] = {}; // correct
std::array<EState, 100> array2 = {}; // wrong
ClassDefOverride(Foo, 1) // Foo class
};
#endif$ root
ROOT Version: 6.37.01
Built for linuxx8664gcc on Oct 23 2025, 07:01:03
From heads/master@v6-37-01-8542-g01185f03c
root [0] .L Foo.h+
root [1] TFile f("test.root", "RECREATE"); TTree t("t", "test"); Foo *event = new Foo();
root [2] t.Branch("Foo", &event)
Error in <TStreamerInfo::Build>: Foo, unknown type: Foo::EState array2
(TBranch *) 0x1545e7d0
root [3]
Where is the problem ?