I m really struggling on this one how do I get this to work

Question

I m really struggling on this one how do I get this to work ``` optics data class Bar val stateFlow MutableStateFlow lt Foo gt val foo = Foo val foo2 = Foo val bar = Bar MutableStateFlow foo inline val lt T gt T current arrow optics Iso lt MutableStateFlow lt T gt T gt inline get = arrow optics Iso get = stateFlow MutableStateFlow lt T gt gt stateFlow value reverseGet = value T gt MutableStateFlow value val baz = bar copy Bar stateFlow current set foo2 the IDE says that `set` needs an infix modifier in PIso ``` otherwise am I doing this right

Alejandro Serrano Mena · Answer

interesting I think the IDE is getting confused about where `set` is coming from in this case

Alejandro Serrano Mena · Answer

if you do `Bar stateFlow current set foo2 ` instead does it help

dave08 · Answer

Truth is in my real case T Option lt V gt does that make any difference

dave08 · Answer

gt if you do `Bar stateFlow current set foo2 ` instead does it help nope I think my problem has to do with trying to combine the generated optics with this one and my receiver is T

dave08 · Answer

When I try to compose them it doesn t work and I m struggling to get the types right

dave08 · Answer

Here the compose function is red ```inline val lt S Any T gt arrow optics Lens lt S MutableStateFlow lt T gt gt currentOpt arrow optics Iso lt S Option lt T gt gt inline get = this compose arrow optics Iso get = stateFlow MutableStateFlow lt Option lt T gt gt gt stateFlow value reverseGet = value Option lt T gt gt MutableStateFlow value ```

dave08 · Answer

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dave08 · Answer

I FINALLY got something that works ```inline val lt S T gt Setter lt S MutableStateFlow lt Option lt T gt gt gt value Setter lt S Option lt T gt gt inline get = this compose arrow optics Iso get = stateFlow MutableStateFlow lt Option lt T gt gt gt stateFlow value reverseGet = value Option lt T gt gt MutableStateFlow value ```

stojan · Answer

hm a bit strange to have a `MutableStateFlow` as a property in a data class typically you have the `MutableStateFlow` on the outside and data is inside

dave08 · Answer

This is a statemachine that needs to listen to states from the outside so I can t just pass in the first state on the other hand optics helps me configure my fixtures including that state so I wanted to just do a copy and set the whole fixture with optics