Macro implicits don't work outside package
See original GitHub issueHey. Check this out: https://github.com/japgolly/upickle/commit/9a976af73ed46eeb7364829e457a973719ed9a7b
Eg2
compiles but Eg1
doesn’t.
[error] upickle/jvm/shared/test/scala/upickle/blah/blah.scala:7: uPickle does not know how to read [upickle.elsewhere.YYY]s; define an implicit Reader[upickle.elsewhere.YYY] to teach it how
[error] def blah(j: String): YYY = read[YYY](j)
[error] ^
[warn] one warning found
[error] one error found
[error] upickle/js/shared/test/scala/upickle/blah/blah.scala:7: uPickle does not know how to read [upickle.elsewhere.YYY]s; define an implicit Reader[upickle.elsewhere.YYY] to teach it how
[error] def blah(j: String): YYY = read[YYY](j)
[error] ^
[warn] one warning found
[error] one error found
Issue Analytics
- State:
- Created 9 years ago
- Comments:17 (13 by maintainers)
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I knew that this issue made it so risky to choose upickle for a project and yet I did it again and here I am, chasing this issue for 3 hours… Even though my code is entirely within a single package and I know about a few other tricks that usually solved it like proper ordering and avoiding nested classes… And still god damn :
The incremental compiler in Intellij is the biggest trap because it works works works until you do
sbt clean
and find it doesn’t work god knows why after 2 hours of development…Anyway, rules of thumb :
Btw the @japgolly’s trick with “implicit realization close to data source” doesn’t work for me…
Moot with 0.5.1