interface method tests

R=r
DELTA=134  (134 added, 0 deleted, 0 changed)
OCL=28373
CL=28380

test/interface8.go

+// 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.
+
+// $G $F.go && $L $F.$A && ./$A.out
+
+package main
+
+type T int
+var nv, np int
+
+func (t T) V() {
+	if t != 42 {
+		panic(t)
+	}
+	nv++
+}
+
+func (t *T) P() {
+	if *t != 42 {
+		panic(t, *t)
+	}
+	np++
+}
+
+type V interface { V() }
+type P interface { P(); V() }
+
+type S struct {
+	T;
+}
+
+type SP struct {
+	*T;
+}
+
+func main() {
+	var t T;
+	var v V;
+	var p P;
+
+	t = 42;
+
+	t.P();
+	t.V();
+
+	v = t;
+	v.V();
+
+	p = &t;
+	p.P();
+	p.V();
+
+	v = &t;
+	v.V();
+
+//	p = t;	// ERROR
+
+//	println("--struct--");
+	var s S;
+	s.T = 42;
+	s.P();
+	s.V();
+
+	v = s;
+	s.V();
+
+	p = &s;
+	p.P();
+	p.V();
+
+	v = &s;
+	v.V();
+
+//	p = s;	// ERROR
+
+//	println("--struct pointer--");
+	var sp SP;
+	sp.T = &t;
+	sp.P();
+	sp.V();
+
+	v = sp;
+	sp.V();
+
+	p = &sp;
+	p.P();
+	p.V();
+
+	v = &sp;
+	v.V();
+
+	p = sp;	// not error
+	p.P();
+	p.V();
+
+	if nv != 13 || np != 7 {
+		panicln("bad count", nv, np)
+	}
+}
+

test/interface9.go

+// 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.
+
+// errchk $G $F.go
+
+package main
+
+type T int
+func (t T) V()
+func (t *T) P()
+
+type V interface { V() }
+type P interface { P(); V() }
+
+type S struct { T; }
+type SP struct { *T; }
+
+func main() {
+	var t T;
+	var v V;
+	var p P;
+	var s S;
+	var sp SP;
+
+	v = t;
+	p = t;	// ERROR "is not"
+	v = &t;
+	p = &t;
+
+	v = s;
+	p = s;	// ERROR "is not"
+	v = &s;
+	p = &s;
+
+	v = sp;
+	p = sp;	// no error!
+	v = &sp;
+	p = &sp;
+}
+