Initial commit: Go 1.23 release state

test/ken/interfun.go

@@ -0,0 +1,59 @@
+// run
+
+// 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 interfaces and methods.
+
+package main
+
+type S struct {
+	a,b	int;
+}
+
+type I1 interface {
+	f	()int;
+}
+
+type I2 interface {
+	g() int;
+	f() int;
+}
+
+func (this *S) f()int {
+	return this.a;
+}
+
+func (this *S) g()int {
+	return this.b;
+}
+
+func
+main() {
+	var i1 I1;
+	var i2 I2;
+	var g *S;
+
+	s := new(S);
+	s.a = 5;
+	s.b = 6;
+
+	// call structure
+	if s.f() != 5 { panic(11); }
+	if s.g() != 6 { panic(12); }
+
+	i1 = s;		// convert S to I1
+	i2 = i1.(I2);	// convert I1 to I2
+
+	// call interface
+	if i1.f() != 5 { panic(21); }
+	if i2.f() != 5 { panic(22); }
+	if i2.g() != 6 { panic(23); }
+
+	g = i1.(*S);		// convert I1 to S
+	if g != s { panic(31); }
+
+	g = i2.(*S);		// convert I2 to S
+	if g != s { panic(32); }
+}