Dictionary generation fails for typedef to template specialization with default parameters

[jblomer]

• Checked for duplicates

Describe the bug

See forum post for details and a reproducer.

Expected behavior

Loading the dictionary in the ROOT prompt should not fail.

To Reproduce

1. Follow instructions in the forum post to build the dictionary.
2. Open ROOT
3. .L libdict.so

Setup

ROOT master build on Arch Linux

[valerioformato]

Any news on this issue? (This is currently blocking a Merge Request on our project)

[pcanal]

A possible workaround

#ifndef __CLING__                                                                                                                                    
using MyClass = SpTmpl<float>;
#else                                                                                                                                               
using MyClass = Tmpl<float, int, int, int>;                                                                                                          
#endif                                                                                                                                              

[valerioformato]

The real case is a bit more convoluted than the example so, if this is a temporary workaround, we'd prefer to wait a little bit more to avoid heavily refactoring the code.
Unless this is a "won't fix" :)