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https://github.com/golang/go
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bee2d5b0ad
Implies no embedding of pointer to interface value either. R=gri, iant, ken2, r, r2 CC=golang-dev https://golang.org/cl/2289041
71 lines
1.2 KiB
Go
71 lines
1.2 KiB
Go
// errchk $G -e $D/$F.go
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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 methods derived from embedded interface and *interface values.
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package main
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import "os"
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const Value = 1e12
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type Inter interface { M() int64 }
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type T int64
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func (t T) M() int64 { return int64(t) }
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var t = T(Value)
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var pt = &t
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var ti Inter = t
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var pti = &ti
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type S struct { Inter }
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var s = S{ ti }
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var ps = &s
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type SP struct { *Inter } // ERROR "interface"
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var i Inter
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var pi = &i
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var ok = true
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func check(s string, v int64) {
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if v != Value {
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println(s, v)
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ok = false
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}
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}
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func main() {
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check("t.M()", t.M())
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check("pt.M()", pt.M())
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check("ti.M()", ti.M())
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check("pti.M()", pti.M()) // ERROR "method"
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check("s.M()", s.M())
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check("ps.M()", ps.M())
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i = t
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check("i = t; i.M()", i.M())
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check("i = t; pi.M()", pi.M()) // ERROR "method"
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i = pt
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check("i = pt; i.M()", i.M())
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check("i = pt; pi.M()", pi.M()) // ERROR "method"
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i = s
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check("i = s; i.M()", i.M())
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check("i = s; pi.M()", pi.M()) // ERROR "method"
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i = ps
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check("i = ps; i.M()", i.M())
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check("i = ps; pi.M()", pi.M()) // ERROR "method"
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if !ok {
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println("BUG: interface10")
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os.Exit(1)
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}
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}
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