diff options
| -rw-r--r-- | src/dotty/tools/dotc/parsing/Parsers.scala | 2 | ||||
| -rw-r--r-- | src/dotty/tools/dotc/reporting/diagnostic/messages.scala | 13 |
2 files changed, 14 insertions, 1 deletions
diff --git a/src/dotty/tools/dotc/parsing/Parsers.scala b/src/dotty/tools/dotc/parsing/Parsers.scala index 6871916dd..754db3d3b 100644 --- a/src/dotty/tools/dotc/parsing/Parsers.scala +++ b/src/dotty/tools/dotc/parsing/Parsers.scala @@ -1623,7 +1623,7 @@ object Parsers { val mod = atPos(in.skipToken()) { Mod.Type() } (mods | Param | ParamAccessor).withAddedMod(mod) } else { - if (mods.hasFlags) syntaxError("`type' expected") + if (mods.hasFlags) syntaxError(TypeParamsTypeExpected(mods, ident())) mods | Param | PrivateLocal } } diff --git a/src/dotty/tools/dotc/reporting/diagnostic/messages.scala b/src/dotty/tools/dotc/reporting/diagnostic/messages.scala index 2913f4f4c..67d53fd22 100644 --- a/src/dotty/tools/dotc/reporting/diagnostic/messages.scala +++ b/src/dotty/tools/dotc/reporting/diagnostic/messages.scala @@ -677,5 +677,18 @@ object messages { | |$fixedVarInAlternative""".stripMargin } + } + + case class TypeParamsTypeExpected(mods: Modifiers, identifier: TermName)(implicit ctx: Context) extends Message(24) { + val kind = "Syntax" + + val msg = hl"""Expected ${"type"} keyword for type parameter $identifier""" + + val explanation = hl"""|This happens when you add modifiers like ${"private"} or ${"protected"} + |to your type parameter definition without adding the ${"type"} keyword. + | + |Add ${"type"} to your code, e.g.: + |${s"trait A[${mods.flags} type $identifier]"} + |""".stripMargin } } |