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Oct 21, 2021
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3.1 release blogpost #1284

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17437a4
Draft of 3.1 release blogpost
Kordyjan Oct 15, 2021
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Apply some suggestions from code review
Kordyjan Oct 18, 2021
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Grammar fixes
Kordyjan Oct 18, 2021
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Some clarifications in the 3.1 blogpost
Kordyjan Oct 18, 2021
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Add compatibility notice
Kordyjan Oct 19, 2021
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Update other files related to the 3.1.0 release
Kordyjan Oct 19, 2021
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Add a paragraph about Mirrors for hierarchical sum types
Kordyjan Oct 20, 2021
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Update blog/_posts/2021-10-19-scala-3.1.0-released.md
Kordyjan Oct 20, 2021
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Kordyjan Oct 20, 2021
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New Compatibility Notice
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Two small clarifications
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Kordyjan Oct 20, 2021
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Kordyjan Oct 20, 2021
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Last clarifications
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9 changes: 8 additions & 1 deletion blog/_posts/2021-10-19-scala-3.1.0-released.md
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Expand Up @@ -6,7 +6,14 @@ title: Scala 3.1.0 released!
---
Hello from the Scala 3 team! It has already been six weeks since we have announced the release candidate for the first minor version after the initial release of Scala 3. Now, after two more RCs, we can confidently promote Scala 3.1.0-RC3 to a new stable release of the language. In other words, Scala 3.1.0 is officially out!

Thanks to Scala 3 strong compatibility guarantees, all code working in 3.0.2 will also work in 3.1. On the other hand, switching to Scala 3.1 allows you to use many improvements and a handful of newly stabilized APIs.
## Compatibility notcie

This is a first *minor* release after the initial release of Scala 3.0. This has following consequences:

- Scala 3.1 is backward source compatible: any code that was working in 3.0 will also work in 3.1.
- Scala 3.1 is backward binary compatible: you can use dependencies compiled with Scala 3.0 in 3.1 projects.
- Scala 3.1 is _not_ forward binary compatible: you _cannot_ use dependencies compiled with Scala 3.1 in Scala 3.0 projects.
- Updating Scala to 3.1 is not forward compatible change. If you are a library maintainer you should only do that in minor release of your project.

## What's new in 3.1

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