Add missing language experimental settings (#24513)

WojciechMazur · web-flow · commit 5066dcac7b72 · 2025-11-24T14:04:23.000+01:00
Add missing language experimental settings for multipleStead, subCases
and relaxedLambdaSyntax

These were omitted and not made available as setting `-language:`
settings
diff --git a/compiler/src/dotty/tools/dotc/config/Feature.scala b/compiler/src/dotty/tools/dotc/config/Feature.scala
@@ -70,6 +70,9 @@ object Feature:
     (into, "Allow into modifier on parameter types"),
     (modularity, "Enable experimental modularity features"),
     (packageObjectValues, "Enable experimental package objects as values"),
+    (multiSpreads, "Enable experimental varargs with multi-spreads"),
+    (subCases, "Enable experimental match expressions with sub-cases"),
+    (relaxedLambdaSyntax, "Enable experimental relaxed lambda syntax"),
   )
 
   // legacy language features from Scala 2 that are no longer supported.

Original file line number	Diff line number	Diff line change
`@@ -70,6 +70,9 @@ object Feature:`
`70`	`70`	`(into, "Allow into modifier on parameter types"),`
`71`	`71`	`(modularity, "Enable experimental modularity features"),`
`72`	`72`	`(packageObjectValues, "Enable experimental package objects as values"),`
	`73`	`+ (multiSpreads, "Enable experimental varargs with multi-spreads"),`
	`74`	`+ (subCases, "Enable experimental match expressions with sub-cases"),`
	`75`	`+ (relaxedLambdaSyntax, "Enable experimental relaxed lambda syntax"),`
`73`	`76`	`)`
`74`	`77`
`75`	`78`	`// legacy language features from Scala 2 that are no longer supported.`