softwaremill / softwaremill/quicklens
Composing or extend PathModify[U,V]
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- Dominant language
- Scala
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- 852
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Description
Is there any way to compose only PathModifies?
Something like following:
case class A(b:B)
case class B(c:C)
case class C(value:Int)
val a = A(B(C(0)))
val mod1 = a.modify(_.b)
val mod2 = mod1.somecomposefunction(_.c)
mod2.setTo(C(1))
I know that you can compose functions of U => PathModify[U, V] but I want to know if there is a way to compose PathModifys directly.
Contributor guide
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by locating the PathModify type and its existing composition support, then compare it with the known composition of functions from U to PathModify[U,V]. Use the nested A, B, and C example in the issue to define what direct composition should support and verify that the composed modifier can set C(1).
Written by the indexing model from the issue text.
Assessment
- Tech stack
- scala
- Domain
- backend-api-design
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 30/100