Scala 3 Macro. Symbols of all classes in classpath

FelixSelter · June 14, 2023, 4:20pm

When writing a macro I can access its Symbol using Symbol.classSymbol(“ClassName”). Is it possible to access all available class Symbols? Find the names of all classes?

Thank you

chuwy · June 18, 2023, 6:47pm

Not exactly what you’re looking for, but the closest thing I’ve seen is this tutorial:

github.com

Lumintorious/Scala-3-Macros-Deep-Dive/blob/main/2. PackageWideSearch.md

# Package-wide Search
### Intention
Have you ever been in a situation where you have a main file or a central control file where you add entries to a list, entries that you define all over the codebase?   Wouldn't it be great if we could generate a macro that scans the whole code for static values of a certain type to return to our main/control module in a list?  

These are just a couple of entities you would want gathered from all over your packages:
- Endpoints for HTTP servers
- Page components for React router
- Tests for a testing framework to run
- Stories for Storybook
- Articles for Documentation

### Example
Here is an example of what we want to accomplish, code-wise:

##### FrontendPage.scala:
```scala
trait FrontendPage {
  def render: Component
}
```

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FelixSelter · June 18, 2023, 7:25pm

Thank you alot. This might even be better than what I was looking for.

bishabosha · June 19, 2023, 8:38am

you can also use quotes.reflect.defn.RootClass to get the class that represents the _root_ package and from there access its declarations, which will contain all packages on the classpath.