scalameta/scalameta

Library to read, analyze, transform and generate Scala programs

Siddhant Sanyam

@siddhant3s

I have a runtime.universe.Symbol for object Foo which is a companion object of a case class. Is it possible to get the object Foo so that I can call a field from it ?

Dmytro Mitin

@DmytroMitin

@lgirault You can use tokens.

@siddhant3s I guess it's not about Scalameta. https://gitter.im/scala/scala

Loïc Girault

@lgirault

thanks @DmytroMitin

Luciano

@lJoublanc

Hey @lgirault how did you manage this? Which term did you use?

Loïc Girault

@lgirault

haha It was something nice to have but not required so I have not taken the time to try it yet

James Koch

@jameskoch

First-time contributor looking for some feedback - scalameta/scalameta#1886

vito-c

@vito-c

I'm writing some macros for an annotation. Is there an example project somewhere I can take a look at that uses scalameta?

Gabriele Petronella

@gabro

@vito-c scalameta macros are an abandoned project. You should use regular macro annotations instead

vito-c

@vito-c

@gabro ah thank you for letting me know so quasiquotes?

finding examples of macros at all has been tough :(

Gabriele Petronella

@gabro

you can use quasiquotes in Scala macros

as per examples, yeah, I know. There's a project that uses macro annotations that I maintain called enumero

and also cats-tagless is a good starting point

vito-c

@vito-c

@gabro thanks! :)

Tomasz Godzik

@tgodzik

Hi, should we release for Scala 2.12.9? Seems that every dependency is already released, but I am not sure how to release for just 2.12.9

and people are pinging us already in Metals :O

Gabriele Petronella

@gabro

I’ll take a look

Tomasz Godzik

@tgodzik

@gabro thanks!

Gabriele Petronella

@gabro

@tgodzik the fix is more involved than expected, due to a change in scalap scalameta/scalameta#1893

Tomasz Godzik

@tgodzik

@gabro damn, I was hoping it would just be a matter of updating the version, will try to take a look, but I know nothing, so my help might not be helpful :O

Martijn Hoekstra

@martijnhoekstra

scala/scala#8282 may have an impact on scalameta (hopefully making your life easier, but...)

should I ping anyone for that?

Lorenzo Testa

@kklorenzotesta

Hi, I can't find anything in the doc about metacp, I understood that generate semanticdb files from libraries, is it correct?

Ilya Kachalsky

@IlyaHalsky

Hi, I'm just starting with scalameta and I'm trying to build code analyzer, is there a way to get current line number from original file while traversing structure?

Dmytro Mitin

@DmytroMitin

@kklorenzotesta now we have compiler plugin https://scalameta.org/docs/semanticdb/guide.html#sbt

Dmytro Mitin

@DmytroMitin

@IlyaHalsky SymbolOccurrence includes range (start_line, start_character, end_line, end_character) https://scalameta.org/docs/semanticdb/specification.html#symboloccurrence

Lorenzo Testa

@kklorenzotesta

@DmytroMitin with the compiler plugin if I want to generate the semanticdb files from a jar I should use InteractiveSemanticdb to get a compiler and then use the compiler api, right? And this is preferred over using metacp?

Dmytro Mitin

@DmytroMitin

@kklorenzotesta https://olafurpg.github.io/scalameta/docs/semanticdb/guide.html#metacp scala.meta.cli.Metacp

Lorenzo Testa

@kklorenzotesta

thank you very much, this is perfect

Ilya Kachalsky

@IlyaHalsky

@DmytroMitin thank you very much!

Siddhant Sanyam

@siddhant3s

Can IntelliJ expand macro-paradise macros (annotation macros) without me having to write a plugin?

Actually, I should probably ask this in scala

P. Oscar Boykin

@johnynek

hi all, does anyone know if the scaladocs are published anywhere? I can't seem to find them.

P. Oscar Boykin

@johnynek

https://oss.sonatype.org/service/local/repositories/releases/archive/org/scalameta/scalameta_2.12/4.2.3/scalameta_2.12-4.2.3-javadoc.jar/!/index.html

there is a trick to get sonatype to serve it.

P. Oscar Boykin

@johnynek

although, it doesn't seem to have types like Source, Defn, etc...

https://oss.sonatype.org/service/local/repositories/releases/archive/org/scalameta/trees_2.12/4.2.3/trees_2.12-4.2.3-javadoc.jar/!/scala/meta/Source.html

okay... jackpot. those are in trees....

Ólafur Páll Geirsson

@olafurpg

@johnynek cool, I didn't know oss.sonatype.org served javadocs, I normally use static.javadoc.io https://static.javadoc.io/org.scalameta/trees_2.12/4.2.3/scala/meta/index.html

it would be nice to unidoc all the modules, but it's quite a hassle to setup

I personally prefer browing the Trees.scala source instead of the javadocs however, https://github.com/scalameta/scalameta/blob/4a920ebc2f7b45aff2fc7492e8d2841f61c0a847/scalameta/trees/shared/src/main/scala/scala/meta/Trees.scala

Along with a REPL

@ import $ivy.`org.scalameta::scalameta:4.2.3`, scala.meta._
import $ivy.$                               , scala.meta._

@ q"val x = 2"
res1: Defn.Val = Defn.Val(List(), List(Pat.Var(Term.Name("x"))), None, Lit.Int(2))

There's also ast explorer https://astexplorer.net/#/gist/1eef12317a449c79a21ce65c68d65d99/9ddae259a2cab4badae68010ccaf2d0b6910cc51

Zoë Frances Weil

@wanderlustzoe

hello everyone! quick question:
I’m porting over my project (which heavily relies on scalameta) to dotty. Does scalameta support being a dependency in a dotty project? I.e is it being built for dotty?

Guillaume Martres

@smarter

It's not, but you can use Scala 2.13 dependencies from a Dotty project as long as you don't call any Scala 2 macro

see https://github.com/lampepfl/dotty-example-project#getting-your-project-to-compile-with-dotty

Zoë Frances Weil

@wanderlustzoe

@smarter <3

Guillaume Martres

@smarter

this might not be ideal for scalameta since I think you need macros for the quasiquotes ?

Zoë Frances Weil

@wanderlustzoe

also, does this mean that i shouldn’t build a project that relies heavily on scalameta in dotty, because there will be no longterm support?

Guillaume Martres

@smarter

so the plan is for Scala 3.0 to be able to use libraries from 2.14 (or 2.13, TBD) in this way

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