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-rw-r--r--test/interface/pointer.go37
1 files changed, 37 insertions, 0 deletions
diff --git a/test/interface/pointer.go b/test/interface/pointer.go
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+++ b/test/interface/pointer.go
@@ -0,0 +1,37 @@
+// errorcheck
+
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Test that interface{M()} = *interface{M()} produces a compiler error.
+// Does not compile.
+
+package main
+
+type Inst interface {
+ Next() *Inst
+}
+
+type Regexp struct {
+ code []Inst
+ start Inst
+}
+
+type Start struct {
+ foo *Inst
+}
+
+func (start *Start) Next() *Inst { return nil }
+
+func AddInst(Inst) *Inst {
+ print("ok in addinst\n")
+ return nil
+}
+
+func main() {
+ print("call addinst\n")
+ var x Inst = AddInst(new(Start)) // ERROR "pointer to interface|incompatible type"
+ print("return from addinst\n")
+ var y *Inst = new(Start) // ERROR "pointer to interface|incompatible type"
+}