Detector for unused variables

[bearophile]

Jonathan M Davis:

> This is the sort of thing that's
> better left to a lint-like tool IMHO.

Putting it in a lint means people have to know what a lint is, 
desire to search it, install, and add its running to their 
compilation ways. It also means the lint needs to contain part of 
a D compiler. Most people I know don't use lints for their C/C++ 
code. On the other the C# programmers see such errors on default, 
with no lint. So this idea is good if the lint is built in the 
compiler, as the analysis option of Clang, do you know about it?

Bye,
bearophile