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https://github.com/golang/go
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4eb7ceba58
if T has pointer methods. this is just a heuristic but it catches the problem robert ran into and lets me put the larger interface issues aside for now. found one bug in pretty. R=ken OCL=26141 CL=26141
76 lines
1.5 KiB
Go
76 lines
1.5 KiB
Go
// $G $D/$F.go && $L $F.$A && ./$A.out
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// check that big vs small, pointer vs not
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// interface methods work.
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package main
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type I interface { M() int64 }
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type BigPtr struct { a, b, c, d int64 }
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func (z *BigPtr) M() int64 { return z.a+z.b+z.c+z.d }
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type SmallPtr struct { a int32 }
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func (z *SmallPtr) M() int64 { return int64(z.a) }
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type IntPtr int32
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func (z *IntPtr) M() int64 { return int64(*z) }
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var bad bool
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func test(name string, i I) {
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m := i.M();
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if m != 12345 {
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println(name, m);
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bad = true;
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}
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}
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func ptrs() {
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var bigptr BigPtr = BigPtr{ 10000, 2000, 300, 45 };
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var smallptr SmallPtr = SmallPtr{ 12345 };
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var intptr IntPtr = 12345;
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// test("bigptr", bigptr);
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test("&bigptr", &bigptr);
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// test("smallptr", smallptr);
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test("&smallptr", &smallptr);
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// test("intptr", intptr);
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test("&intptr", &intptr);
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}
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type Big struct { a, b, c, d int64 }
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func (z Big) M() int64 { return z.a+z.b+z.c+z.d }
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type Small struct { a int32 }
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func (z Small) M() int64 { return int64(z.a) }
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type Int int32
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func (z Int) M() int64 { return int64(z) }
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func nonptrs() {
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var big Big = Big{ 10000, 2000, 300, 45 };
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var small Small = Small{ 12345 };
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var int Int = 12345;
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test("big", big);
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test("&big", &big);
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test("small", small);
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test("&small", &small);
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test("int", int);
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test("&int", &int);
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}
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func main() {
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ptrs();
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nonptrs();
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if bad {
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sys.Exit(1)
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}
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}
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