1 files changed, 74 insertions, 0 deletions
diff --git a/test/interface/bigdata.go b/test/interface/bigdata.go
new file mode 100644
index 0000000..0f2e9a9
--- /dev/null
+++ b/test/interface/bigdata.go
@@ -0,0 +1,74 @@
+// 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 big vs. small, pointer vs. value interface methods.
+
+package main
+
+type I interface { M() int64 }
+
+type BigPtr struct { a, b, c, d int64 }
+func (z *BigPtr) M() int64 { return z.a+z.b+z.c+z.d }
+
+type SmallPtr struct { a int32 }
+func (z *SmallPtr) M() int64 { return int64(z.a) }
+
+type IntPtr int32
+func (z *IntPtr) M() int64 { return int64(*z) }
+
+var bad bool
+
+func test(name string, i I) {
+	m := i.M()
+	if m != 12345 {
+		println(name, m)
+		bad = true
+	}
+}
+
+func ptrs() {
+	var bigptr BigPtr = BigPtr{ 10000, 2000, 300, 45 }
+	var smallptr SmallPtr = SmallPtr{ 12345 }
+	var intptr IntPtr = 12345
+
+//	test("bigptr", bigptr)
+	test("&bigptr", &bigptr)
+//	test("smallptr", smallptr)
+	test("&smallptr", &smallptr)
+//	test("intptr", intptr)
+	test("&intptr", &intptr)
+}
+
+type Big struct { a, b, c, d int64 }
+func (z Big) M() int64 { return z.a+z.b+z.c+z.d }
+
+type Small struct { a int32 }
+func (z Small) M() int64 { return int64(z.a) }
+
+type Int int32
+func (z Int) M() int64 { return int64(z) }
+
+func nonptrs() {
+	var big Big = Big{ 10000, 2000, 300, 45 }
+	var small Small = Small{ 12345 }
+	var int Int = 12345
+
+	test("big", big)
+	test("&big", &big)
+	test("small", small)
+	test("&small", &small)
+	test("int", int)
+	test("&int", &int)
+}
+
+func main() {
+	ptrs()
+	nonptrs()
+
+	if bad {
+		println("BUG: interface4")
+	}
+}