scala - What API for optional case class creation matches common developer expectations -

what api best use point of view of obviousness optional case class creation?

suppose have case class

case class position(position: int) 

and position should never outside range [0, 18]. additionally want fp friendly argument cannot rejected exception when constraint have been violated.

is there better approach uses factory method result in option,

object position {    def apply(position: int): option[position] =     if (in range) some(position(position)) else none  } 

when called not clear option returned

val p = position(99) 

would better?

object position {    def maybe(position: int): option[position] =     if(in range) some(position(position)) else none  } 

then usage becomes,

val p = position.maybe(99) 

but maybe boilerplate clarify result type.

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this solution went based on linked duplicate answer,

case class port private(portnumber: int)  object port {    private val validrange = range(0, 65535+1)    def opt(portnumber: int): option[port] =     if (validrange contains portnumber)       some(port(portnumber))     else       none } 

opt selected instead of fromint, make or create because gives hint result option[t].