Fix REPL: Handle :: operator correctly to allow multi-line input (Fixes #24142)

vaibhav410 · vaibhav410 · commit ed4ae7295248 · 2025-11-11T13:36:32.000+05:30
diff --git a/repl/src/dotty/tools/repl/ReplDriver.scala b/repl/src/dotty/tools/repl/ReplDriver.scala
@@ -317,7 +317,7 @@ class ReplDriver(settings: Array[String],
 
   /** Extract possible completions at the index of `cursor` in `expr` */
   protected final def completions(cursor: Int, expr: String, state0: State): List[Completion] =
-    if expr.startsWith(":") then
+    if expr.startsWith("::") then
       ParseResult.commands.collect {
         case command if command._1.startsWith(expr) => Completion(command._1, "", List())
       }

Original file line number	Diff line number	Diff line change
`@@ -317,7 +317,7 @@ class ReplDriver(settings: Array[String],`
`317`	`317`
`318`	`318`	/** Extract possible completions at the index of `cursor` in `expr` */
`319`	`319`	`protected final def completions(cursor: Int, expr: String, state0: State): List[Completion] =`
`320`		`- if expr.startsWith(":") then`
	`320`	`+ if expr.startsWith("::") then`
`321`	`321`	`ParseResult.commands.collect {`
`322`	`322`	`case command if command._1.startsWith(expr) => Completion(command._1, "", List())`
`323`	`323`	`}`