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added Warning options to the list of scala3 compiler options #2959

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added Warning options to the list of scala3 compiler options #2959

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added Warning options to the list of scala3 compiler options
rssh Jan 30, 2024
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Merge branch 'scala:main' into patch-1
rssh Mar 11, 2024
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Update options-new.md
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15 changes: 15 additions & 0 deletions _overviews/scala3-migration/options-new.md
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Expand Up @@ -40,6 +40,21 @@ The current page only contains the options that were added in Scala 3.0.x.
| `-Vprofile-sorted-by:<column-name>` | Show metrics about sources and internal representations sorted by given column name. |
| `-Vprofile-details N` | Like -Vprofile, but also show metrics about sources and internal representations of the N most complex methods |

## Warning settings

| 3.3.x | description |
|-|-|
| `-Wunused:imports` | Warn about unused imports |
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weren't all -Wunused present in Scala 2? The same for value-discard.Wnonunit-statement seems to be new, same for Wimplausible-patterns and some others.

ScalaSettings.scala#L169-L170
https://docs.scala-lang.org/overviews/compiler-options/

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Scala 2 has -Wnonunit-statement

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Ok, deleted options that were presented in scala-2

By the way, we need another page with all scala3 options in some other document, but this would be another issue.

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But -Wnounit-statement for scala2 is not documented in https://docs.scala-lang.org/overviews/compiler-options/

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@SethTisue SethTisue Mar 11, 2024 •
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That page has long been in a grievous state of unmaintainedness, I'm ashamed to say: #1711

| `-Wunused:privates` | Warn about unused private definitions |
| `-Wunused:locals` | Warn about unused local definitions |
| `-Wunused:explicits` | Warn about unused explicit parameters |
| `-Wunused:implicits` | Warn about unused implicit parameters |
| `-Wunused:params` | Warn about all unused parameters |
| `-Wunused:all` | Enable all warnings |
| `-Wvalue-discard` | Warn about discarding values |
| `-Wnonunit-statement` | Warn when block statements are non-Unit expressions (added in 3.3.1) |


## Advanced settings

| 3.0.x | description |
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