𐂠:Guides/Tex/Box Registers

## box registers

you don't need these unless you're trying to programmatically inspect and/or rework some written text (or doing tricky things with alignment i guess)

"there are 256 box registers" -- luatex probably doesnt have this limit but wtf do i know

### measure length of some text

so i want to take some text, see how wide it is when typeset, then create a newline and put an hskip of that size an

first try:

\def\breakline#1{
    #1\nl
    \newbox\beforebrk
    \setbox\beforebrk\hbox{#1}
    \hskip\wd\beforebrk}