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Advantages over AnyVal? #42

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CremboC opened this issue Jan 30, 2019 · 2 comments
Open

Advantages over AnyVal? #42

CremboC opened this issue Jan 30, 2019 · 2 comments

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@CremboC
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CremboC commented Jan 30, 2019

The README.md compares this library to Haskell's newtype and to Tagged types. However, more crucially, it doesn't mention how this is any different/better than simply using case class Thing(value: String) extends AnyVal.

From my understand this is an alternative to extends AnyVal, hence this info is crucial.
@markschaake
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See https://docs.scala-lang.org/overviews/core/value-classes.html

@barambani
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@CremboC you might also find this

https://failex.blogspot.com/2017/04/the-high-cost-of-anyval-subclasses.html

and this

https://github.com/barambani/http4s-extend#new-type

interesting on the subject.

ghostbuster91 added a commit to ghostbuster91/scala-newtype that referenced this issue Feb 10, 2022
@ghostbuster91
Add note on value classes vs @newtype
73ed507 
I think that this piece of information is very crucial since value classes are native for scala. I know that there is this issue estatico#42 but I would expect to see that information in the top of the readme.

I mostly copy-pasted what was in the issue and made it more discover-able.
@ghostbuster91 ghostbuster91 mentioned this issue Feb 10, 2022
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@markschaake @barambani @CremboC