diff options
Diffstat (limited to 'src/cmd/compile/internal/types2/signature.go')
| -rw-r--r-- | src/cmd/compile/internal/types2/signature.go | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/cmd/compile/internal/types2/signature.go b/src/cmd/compile/internal/types2/signature.go index d28e7b8944..ddad1f0311 100644 --- a/src/cmd/compile/internal/types2/signature.go +++ b/src/cmd/compile/internal/types2/signature.go @@ -132,7 +132,7 @@ func (check *Checker) funcType(sig *Signature, recvPar *syntax.Field, tparams [] // Also: Don't report an error via genericType since it will be reported // again when we type-check the signature. // TODO(gri) maybe the receiver should be marked as invalid instead? - if recv := asNamed(check.genericType(rname, false)); recv != nil { + if recv, _ := check.genericType(rname, false).(*Named); recv != nil { recvTParams = recv.TParams().list() } } @@ -211,6 +211,12 @@ func (check *Checker) funcType(sig *Signature, recvPar *syntax.Field, tparams [] switch T := rtyp.(type) { case *Named: T.expand(nil) + // The receiver type may be an instantiated type referred to + // by an alias (which cannot have receiver parameters for now). + if T.TArgs() != nil && sig.RParams() == nil { + check.errorf(recv.pos, "cannot define methods on instantiated type %s", recv.typ) + break + } // spec: "The type denoted by T is called the receiver base type; it must not // be a pointer or interface type and it must be declared in the same package // as the method." |