diff options
| -rw-r--r-- | compiler/src/dotty/tools/dotc/parsing/Parsers.scala | 2 | ||||
| -rw-r--r-- | compiler/src/dotty/tools/dotc/reporting/diagnostic/messages.scala | 27 |
2 files changed, 28 insertions, 1 deletions
diff --git a/compiler/src/dotty/tools/dotc/parsing/Parsers.scala b/compiler/src/dotty/tools/dotc/parsing/Parsers.scala index 18f0b42f5..5604cb9e4 100644 --- a/compiler/src/dotty/tools/dotc/parsing/Parsers.scala +++ b/compiler/src/dotty/tools/dotc/parsing/Parsers.scala @@ -540,7 +540,7 @@ object Parsers { def handleThis(qual: Ident) = { in.nextToken() val t = atPos(start) { This(qual) } - if (!thisOK && in.token != DOT) syntaxError("`.' expected") + if (!thisOK && in.token != DOT) syntaxError(DanglingThisInPath(), start) dotSelectors(t, finish) } def handleSuper(qual: Ident) = { diff --git a/compiler/src/dotty/tools/dotc/reporting/diagnostic/messages.scala b/compiler/src/dotty/tools/dotc/reporting/diagnostic/messages.scala index 25db28e4a..9ba771be9 100644 --- a/compiler/src/dotty/tools/dotc/reporting/diagnostic/messages.scala +++ b/compiler/src/dotty/tools/dotc/reporting/diagnostic/messages.scala @@ -966,4 +966,31 @@ object messages { | ${"val foo: Int = 3"} |""" } + + case class DanglingThisInPath()(implicit ctx: Context) extends Message(36) { + val kind = "Syntax" + val msg = hl"""Expected an additional member selection after the keyword ${"this"}""" + + val importCode = + """import MyClass.this.member + |// ^^^^^^^ + """ + + val typeCode = + """type T = MyClass.this.Member + |// ^^^^^^^ + """ + + val explanation = + hl"""|Paths of imports and type selections must not end with the keyword ${"this"}. + | + |Maybe you forgot to select a member of ${"this"}? + | + |- Example for a valid import expression using a path + |${importCode} + | + |- Example for a valid type using a path + |${typeCode} + |""" + } } |