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https://github.com/golang/go
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62 lines
1.1 KiB
Go
62 lines
1.1 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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// Test that basic operations on named types are valid
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// and preserve the type.
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package main
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type Bool bool
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type Map map[int]int
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func (Map) M() {}
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type Slice []byte
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var slice Slice
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func asBool(Bool) {}
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func asString(String) {}
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type String string
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func main() {
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var (
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b Bool = true
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i, j int
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c = make(chan int)
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m = make(Map)
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)
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asBool(b)
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asBool(!b)
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asBool(true)
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asBool(*&b)
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asBool(Bool(true))
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asBool(1 != 2) // ERROR "cannot use.*type bool.*as type Bool"
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asBool(i < j) // ERROR "cannot use.*type bool.*as type Bool"
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_, b = m[2] // ERROR "cannot .* bool.*type Bool"
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var inter interface{}
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_, b = inter.(Map) // ERROR "cannot .* bool.*type Bool"
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_ = b
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var minter interface {
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M()
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}
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_, b = minter.(Map) // ERROR "cannot .* bool.*type Bool"
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_ = b
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_, bb := <-c
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asBool(bb) // ERROR "cannot use.*type bool.*as type Bool"
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_, b = <-c // ERROR "cannot .* bool.*type Bool"
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_ = b
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asString(String(slice)) // ok
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}
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