gcc/testsuite/go.test/test/named1.go

   1 // errorcheck
   2
   3 // Copyright 2009 The Go Authors. All rights reserved.
   4 // Use of this source code is governed by a BSD-style
   5 // license that can be found in the LICENSE file.
   6
   7 // Test that basic operations on named types are valid
   8 // and preserve the type.
   9 // Does not compile.
  10
  11 package main
  12
  13 type Bool bool
  14
  15 type Map map[int]int
  16
  17 func (Map) M() {}
  18
  19 type Slice []byte
  20
  21 var slice Slice
  22
  23 func asBool(Bool)     {}
  24 func asString(String) {}
  25
  26 type String string
  27
  28 func main() {
  29         var (
  30                 b    Bool = true
  31                 i, j int
  32                 c    = make(chan int)
  33                 m    = make(Map)
  34         )
  35
  36         asBool(b)
  37         asBool(!b)
  38         asBool(true)
  39         asBool(*&b)
  40         asBool(Bool(true))
  41         asBool(1 != 2) // ok now
  42         asBool(i < j)  // ok now
  43
  44         _, b = m[2] // ok now
  45
  46         var inter interface{}
  47         _, b = inter.(Map) // ok now
  48         _ = b
  49
  50         var minter interface {
  51                 M()
  52         }
  53         _, b = minter.(Map) // ok now
  54         _ = b
  55
  56         _, bb := <-c
  57         asBool(bb) // ERROR "cannot use.*type bool.*as type Bool"
  58         _, b = <-c // ok now
  59         _ = b
  60
  61         asString(String(slice)) // ok
  62 }