Hi, what does `with(LocalDensity.current){sizeDp.toPx()}` really do?

# compose

[Mehdi Haghgoo]

Hi, what does with(LocalDensity.current){sizeDp.toPx()} really do?

[Filip Wiesner]

You can look at the implementation

[Mehdi Haghgoo]

I know, but what is the effect of calling Dp.toPx() inside with(){}?

[Filip Wiesner]

You can't call it otherwise. You have to be in Density context (this is Density) to access this conversion extension function. You could also do LocalDensity.current.run { sizeDp.toPx() }

[Filip Wiesner]

It's because this extension function is defined in Density interface so it has two receivers (contexts). One is Density and one is Dp defined on the function