diff options
Diffstat (limited to 'compiler/src/dotty/tools/dotc/ast')
| -rw-r--r-- | compiler/src/dotty/tools/dotc/ast/Desugar.scala | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/compiler/src/dotty/tools/dotc/ast/Desugar.scala b/compiler/src/dotty/tools/dotc/ast/Desugar.scala index 8499330fb..5f9d48798 100644 --- a/compiler/src/dotty/tools/dotc/ast/Desugar.scala +++ b/compiler/src/dotty/tools/dotc/ast/Desugar.scala @@ -242,6 +242,12 @@ object desugar { * class C { type v C$T; type v T = C$T } */ def typeDef(tdef: TypeDef)(implicit ctx: Context): Tree = { + val name = + if (tdef.name.hasVariance && tdef.mods.is(Param)) { + ctx.error(em"type parameter name may not start with `+' or `-'", tdef.pos) + ("$" + tdef.name).toTypeName + } + else tdef.name if (tdef.mods is PrivateLocalParam) { val tparam = cpy.TypeDef(tdef)(name = tdef.name.expandedName(ctx.owner)) .withMods(tdef.mods &~ PrivateLocal | ExpandedName) |