fix #12981 add REPL show diagnostics level warn | err

compiler/src/dotty/tools/repl/Rendering.scala

@@ -33,7 +33,8 @@ private[repl] class Rendering(parentClassLoader: Option[ClassLoader] = None) {
 
   /** A `MessageRenderer` for the REPL without file positions */
   private val messageRenderer = new MessageRendering {
-    override def posStr(pos: SourcePosition, diagnosticLevel: String, message: Message)(using Context): String = ""
+    override def posStr(pos: SourcePosition, diagnosticLevel: String, message: Message)(using Context): String =
+      s"-- $diagnosticLevel:"
   }
 
   private var myClassLoader: ClassLoader = _

compiler/test-resources/repl/1379

@@ -1,4 +1,5 @@
 scala>  object Foo { val bar = new Object { def baz = 1 }; bar.baz }
+-- Error:
 1 |  object Foo { val bar = new Object { def baz = 1 }; bar.baz }
   |                                                     ^^^^^^^
   |                                       value baz is not a member of Object

compiler/test-resources/repl/errmsgs

@@ -1,42 +1,50 @@
 scala> class Inv[T](x: T)
 // defined class Inv
 scala> val x: List[String] = List(1)
+-- Error:
 1 | val x: List[String] = List(1)
   |                            ^
   |                            Found:    (1 : Int)
   |                            Required: String
 scala> val y: List[List[String]] = List(List(1))
+-- Error:
 1 | val y: List[List[String]] = List(List(1))
   |                                       ^
   |                                       Found:    (1 : Int)
   |                                       Required: String
 scala> val z: (List[String], List[Int]) = (List(1), List("a"))
+-- Error:
 1 | val z: (List[String], List[Int]) = (List(1), List("a"))
   |                                          ^
   |                                          Found:    (1 : Int)
   |                                          Required: String
+-- Error:
 1 | val z: (List[String], List[Int]) = (List(1), List("a"))
   |                                                   ^^^
   |                                                  Found:    ("a" : String)
   |                                                  Required: Int
 scala> val a: Inv[String] = new Inv(new Inv(1))
+-- Error:
 1 | val a: Inv[String] = new Inv(new Inv(1))
   |                              ^^^^^^^^^^
   |                              Found:    Inv[Int]
   |                              Required: String
 scala> val b: Inv[String] = new Inv(1)
+-- Error:
 1 | val b: Inv[String] = new Inv(1)
   |                              ^
   |                              Found:    (1 : Int)
   |                              Required: String
 scala> abstract class C { type T; val x: T; val s: Unit = { type T = String; var y: T = x; locally { def f() = { type T = Int; val z: T = y }; f() } }; }
+-- Error:
 1 | abstract class C { type T; val x: T; val s: Unit = { type T = String; var y: T = x; locally { def f() = { type T = Int; val z: T = y }; f() } }; }
   |                                                                                  ^
   |Found:    (C.this.x : C.this.T)
   |Required: T²
   |
   |where:    T  is a type in class C
   |          T² is a type in the initializer of value s which is an alias of String
+-- Error:
 1 | abstract class C { type T; val x: T; val s: Unit = { type T = String; var y: T = x; locally { def f() = { type T = Int; val z: T = y }; f() } }; }
   |                                                                                                                                    ^
   |Found:    (y : T)
@@ -45,27 +53,33 @@ scala> abstract class C { type T; val x: T; val s: Unit = { type T = String; var
   |where:    T  is a type in the initializer of value s which is an alias of String
   |          T² is a type in method f which is an alias of Int
 scala> class Foo() { def bar: Int = 1 }; val foo = new Foo(); foo.barr
+-- Error:
 1 | class Foo() { def bar: Int = 1 }; val foo = new Foo(); foo.barr
   |                                                        ^^^^^^^^
   |                 value barr is not a member of Foo - did you mean foo.bar?
 scala> val x: List[Int] = "foo" :: List(1)
+-- Error:
 1 | val x: List[Int] = "foo" :: List(1)
   |                    ^^^^^
   |                    Found:    ("foo" : String)
   |                    Required: Int
 scala> while (((  foo ))) {}
+-- Error:
 1 | while (((  foo ))) {}
   |            ^^^
   |            Not found: foo
 scala> val a: iDontExist = 1
+-- Error:
 1 | val a: iDontExist = 1
   |        ^^^^^^^^^^
   |        Not found: type iDontExist
 scala> def foo1(x: => Int) = x _
+-- Error:
 1 | def foo1(x: => Int) = x _
   |                       ^^^
   |Only function types can be followed by _ but the current expression has type Int
 scala> def foo2(x: => Int): () => Int = x _
+-- Error:
 1 | def foo2(x: => Int): () => Int = x _
   |                                  ^^^
   |Only function types can be followed by _ but the current expression has type Int

compiler/test-resources/repl/errorThenValid

@@ -1,4 +1,5 @@
 scala> val xs = scala.collection.mutable.ListBuffer[Int]
+-- Error:
 1 | val xs = scala.collection.mutable.ListBuffer[Int]
   |          ^
   |          Missing parameter type

compiler/test-resources/repl/i1370

@@ -1,4 +1,5 @@
 scala> object Lives { class Private { def foo1: Any = new Private.C1; def foo2: Any = new Private.C2 };  object Private { class C1 private {}; private class C2 {} } }
+-- Error:
 1 | object Lives { class Private { def foo1: Any = new Private.C1; def foo2: Any = new Private.C2 };  object Private { class C1 private {}; private class C2 {} } }
   |                                                    ^^^^^^^^^^
   |constructor C1 cannot be accessed as a member of Lives.Private.C1 from class Private.

compiler/test-resources/repl/i2063

@@ -1,12 +1,15 @@
 scala> 	class Foo extends Bar // with one tab
+-- Error:
 1 | 	class Foo extends Bar // with one tab
   | 	                  ^^^
   | 	                  Not found: type Bar
 scala>                                                                               class Foo extends Bar // with spaces
+-- Error:
 1 |                                                                               class Foo extends Bar // with spaces
   |                                                                                                 ^^^
   |                                                       Not found: type Bar
 scala>                                                                                  class Foo extends Bar // with tabs
+-- Error:
 1 |                                                                                  class Foo extends Bar // with tabs
   |                                                                                                    ^^^
   |                                                       Not found: type Bar

compiler/test-resources/repl/i2213

@@ -1,9 +1,10 @@
 scala> def x
+-- Error:
 1 | def x
   |      ^
   |      Missing return type
-
 scala> def x: Int
+-- Error:
 1 | def x: Int
   |     ^
   |Declaration of method x not allowed here: only classes can have declared but undefined members

compiler/test-resources/repl/i2631

@@ -1,4 +1,5 @@
 scala> class Foo(x : Any) { val foo : Integer = 0; def this() = { this(foo) } }
+-- Error:
 1 | class Foo(x : Any) { val foo : Integer = 0; def this() = { this(foo) } }
   |                                                                 ^^^
   |                          foo is not accessible from constructor arguments

compiler/test-resources/repl/i4184

@@ -5,6 +5,7 @@ scala> object bar { class Foo }
 scala> implicit def eqFoo: CanEqual[foo.Foo, foo.Foo] = CanEqual.derived
 def eqFoo: CanEqual[foo.Foo, foo.Foo]
 scala> object Bar { new foo.Foo == new bar.Foo }
+-- Error:
 1 | object Bar { new foo.Foo == new bar.Foo }
   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^
   |      Values of types foo.Foo and bar.Foo cannot be compared with == or !=

compiler/test-resources/repl/i4217

@@ -1,4 +1,5 @@
 scala> def foo(x: Option[Int]) = x match { case None => }
+-- Warning:
 1 | def foo(x: Option[Int]) = x match { case None => }
   |                           ^
   |                           match may not be exhaustive.

compiler/test-resources/repl/i4566

@@ -1,4 +1,5 @@
 scala> object test { type ::[A, B]; def a: Int :: Int = ???; def b: Int = a }
+-- Error:
 1 | object test { type ::[A, B]; def a: Int :: Int = ???; def b: Int = a }
   |                                                                    ^
   |                                                      Found:    Int :: Int

compiler/test-resources/repl/i5733

@@ -1,7 +1,8 @@
 scala> abstract class F { def f(arg: Any): Unit; override def toString = "F" }
 // defined class F
 scala> val f: F = println
+-- Warning:
 1 | val f: F = println
   |            ^^^^^^^
   |method println is eta-expanded even though F does not have the @FunctionalInterface annotation.
-val f: F = F
+val f: F = F

compiler/test-resources/repl/i6474

@@ -9,6 +9,7 @@ val res0: (Any, Int) = (1,2)
 scala> ((1, 2): Foo2.T[Int][Int]): Foo2.T[Any][Int]
 val res1: (Any, Int) = (1,2)
 scala> (1, 2): Foo3.T[Int][Int]
+-- Error:
 1 | (1, 2): Foo3.T[Int][Int]
   |         ^^^^^^^^^^^^^^^^
   |         Missing type parameter for Foo3.T[Int][Int]

compiler/test-resources/repl/i6676

@@ -1,19 +1,24 @@
 scala> xml"
+-- Error:
 1 | xml"
   |    ^
   |    unclosed string literal
 scala> xml""
+-- Error:
 1 | xml""
   | ^^^^^
   | value xml is not a member of StringContext
 scala> xml"""
+-- Error:
 1 | xml"""
   |    ^
   |    unclosed multi-line string literal
+-- Error:
 1 | xml"""
   |       ^
   |       unclosed multi-line string literal
 scala> s"
+-- Error:
 1 | s"
   |  ^
   |  unclosed string literal

compiler/test-resources/repl/i7644

@@ -1,14 +1,18 @@
 scala> class T extends CanEqual
+-- Error:
 1 | class T extends CanEqual
   |       ^
   |       Cannot extend sealed trait CanEqual in a different source file
+-- Error:
 1 | class T extends CanEqual
   |                 ^^^^^^^^
   |                 Missing type parameter for CanEqual
 scala> class T extends CanEqual
+-- Error:
 1 | class T extends CanEqual
   |       ^
   |       Cannot extend sealed trait CanEqual in a different source file
+-- Error:
 1 | class T extends CanEqual
   |                 ^^^^^^^^
   |                 Missing type parameter for CanEqual

compiler/test-resources/repl/i9227

@@ -1,4 +1,5 @@
 scala> import scala.quoted._; inline def myMacro[T]: Unit = ${ myMacroImpl[T] }; def myMacroImpl[T](using Quotes): Expr[Unit] = '{}; println(myMacro[Int])
+-- Error:
 1 | import scala.quoted._; inline def myMacro[T]: Unit = ${ myMacroImpl[T] }; def myMacroImpl[T](using Quotes): Expr[Unit] = '{}; println(myMacro[Int])
   |                                                                                                                                       ^^^^^^^^^^^^
   |      Cannot call macro method myMacroImpl defined in the same source file

compiler/test-resources/repl/importFromObj

@@ -5,17 +5,20 @@ scala> object o { val xs = List(1, 2, 3) }
 // defined object o
 scala> import o._
 scala> buf += xs
+-- Error:
 1 | buf += xs
   |        ^^
   |        Found:    (o.xs : List[Int])
   |        Required: Int
 scala> buf ++= xs
 val res0: scala.collection.mutable.ListBuffer[Int] = ListBuffer(1, 2, 3)
 scala> import util.foobar
+-- Error:
 1 | import util.foobar
   |             ^^^^^^
   |             value foobar is not a member of util
 scala> import util.foobar.bar
+-- Error:
 1 | import util.foobar.bar
   |        ^^^^^^^^^^^
   |        value foobar is not a member of util

compiler/test-resources/repl/notFound

@@ -1,8 +1,10 @@
 scala>  Foo
+-- Error:
 1 |  Foo
   |  ^^^
   |  Not found: Foo
 scala>  Bar
+-- Error:
 1 |  Bar
   |  ^^^
-  |  Not found: Bar
+  |  Not found: Bar

compiler/test-resources/repl/overrides

@@ -1,10 +1,12 @@
 scala> class B { override def foo(i: Int): Unit = {}; }
+-- Error:
 1 | class B { override def foo(i: Int): Unit = {}; }
   |                        ^
   |                        method foo overrides nothing
 scala> class A { def foo: Unit = {}; }
 // defined class A
 scala> class B extends A { override def foo(i: Int): Unit = {}; }
+-- Error:
 1 | class B extends A { override def foo(i: Int): Unit = {}; }
   |                                  ^
   |      method foo has a different signature than the overridden declaration

compiler/test-resources/repl/parsing

@@ -1,14 +1,15 @@
-scala> ; 
-scala> ;; 
-scala> 1; 2 
+scala> ;
+scala> ;;
+scala> 1; 2
 val res0: Int = 1
 val res1: Int = 2
-scala> 1; 
+scala> 1;
 val res2: Int = 1
-scala> 1;; 2 
+scala> 1;; 2
 val res3: Int = 1
 val res4: Int = 2
-scala> } 
+scala> }
+-- Error:
 1 | }
   | ^
   | eof expected, but '}' found

compiler/test-resources/type-printer/type-mismatch

@@ -3,6 +3,7 @@ scala> case class Foo[A](a: A)
 scala> Foo(1)
 val res0: Foo[Int] = Foo(1)
 scala> val x: Foo[String] = res0
+-- Error:
 1 | val x: Foo[String] = res0
   |                      ^^^^
   |                      Found:    (res0 : Foo[Int])

compiler/test/dotty/tools/repl/ShadowingTests.scala

@@ -78,6 +78,7 @@ class ShadowingTests extends ReplTest(options = ShadowingTests.options):
     shadowed = "class C(val c: Int)",
     script =
       """|scala> new C().c
+         |-- Error:
          |1 | new C().c
          |  | ^^^^^^^
          |  | missing argument for parameter c of constructor C in class C: (c: Int): C