KDevelop 5.x shows sizes of classes in tooltip when hovering their names. E.g. when I type in "typedef std::type_info x;" and hover "type_info", the tooltip says:
    size: 16 Bytes
    aligned to: 8 Bytes

But:
 1. The same info is how displayed when I hover "x" in the above line.
 2. There's no way to get the size of a class template instance because you can't trigger the hover event for the whole expression "std::vector<int>". Even if I write "typedef std::vector<int> vector_int;", the tooltip for vector_int does not have size/alignment information because it's a typedef.

Reproducible: Always