Byte-compiler warnings

[Marcin Borkowski <mbork@mbork.pl>]

Hi all,

I remember someone somewhere writing that Emacs byte-compiler is useful
even if you don't want the compiled code, since it issues various
warnings about bad Elisp constructs.  I didn't find much about it in the
manual, which referred to the docstring of the variable
`byte-compile-warnings'.  That docstring gave a list of symbols denoting
various categories of warnings; the most interesting were probably
`mapcar' and `suspicious'.  Grepping the `bytecomp.el' source (GNU Emacs
25.0.50.1) seems to imply that currently the only case where 'suspicious
is used is a combination of `save-excursion' and `set-buffer'.  Am
I right?

Are there other tools that assist in writing good Elisp code?  I know
about checkdoc, is there anything else?

TIA,

-- 
Marcin Borkowski
http://octd.wmi.amu.edu.pl/en/Marcin_Borkowski
Faculty of Mathematics and Computer Science
Adam Mickiewicz University