Problem building ADIOS2 with C++20 onwards

[mohrmarc]

C++ Language Standard Problem
The constructor and destructor of the Variable class are declared as

• Variable<T>( ... )
• ~Variable<T>()

The redudant <T> part seems to violated newer C++ standards starting with C++20. See e.g. this discussion on stackoverflow.

To Reproduce
I came across this issue, when trying to build ADIOS2 with spack v0.23. The latter passed -std=c++23 as option to my GCC.

Expected behavior
ADIOS2 should build without errors.

Desktop (please complete the following information):

• OS/Platform: Debian GNU/Linux 12 (bookworm)
• GCC 12.0.2 in combination with spack 0.23

[github-actions]

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