Defining and passing arguments

Question

I would like to pass the arguments

->,line width=1.2pt

to command

\draw [] ...

However, this does not work

\newcommand\newstyle{->,line width=1.2pt}
\draw[\newstyle]

Is there any way to do that?

Answer 1

Tikz options are not handled that way; if you pass a macro to \draw, it will think you meant to call a single key with the name ->,line width=1.2pt. Instead, use a real style:

\tikzset{newstyle/.style = {->,line width=1.2pt}}
\draw[newstyle] ...