When hover on sizeof keyword show size in bytes.

Alot of bugs are due to sizeof misuse. for ex. if intention is to get size of struct, but missing & character(when variable is pointer of the struct), then sizeof will return pointer size instead.

A way to try to minimize those bugs is qtcreator to have feature that will calculate(get info from clang parser) evaluated size in bytes and show them in tooltip. 

For ex:

Now when I hover over 'sizeof(int) it shows 'Unsigned long (with F1 icon)'

and it can be improved with: 'Unsigned long(evaluated size is 4 bytes) (with F1 icon)'