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

   1 // errchk $G -e $D/$F.go
   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
  10 package main
  11
  12 type Bool bool
  13
  14 type Map map[int]int
  15
  16 func (Map) M() {}
  17
  18 type Slice []byte
  19
  20 var slice Slice
  21
  22 func asBool(Bool)     {}
  23 func asString(String) {}
  24
  25 type String string
  26
  27 func main() {
  28         var (
  29                 b    Bool = true
  30                 i, j int
  31                 c    = make(chan int)
  32                 m    = make(Map)
  33         )
  34
  35         asBool(b)
  36         asBool(!b)
  37         asBool(true)
  38         asBool(*&b)
  39         asBool(Bool(true))
  40         asBool(1 != 2) // ok now
  41         asBool(i < j)  // ok now
  42
  43         _, b = m[2] // ERROR "cannot .* bool.*type Bool"
  44
  45         var inter interface{}
  46         _, b = inter.(Map) // ERROR "cannot .* bool.*type Bool"
  47         _ = b
  48
  49         var minter interface {
  50                 M()
  51         }
  52         _, b = minter.(Map) // ERROR "cannot .* bool.*type Bool"
  53         _ = b
  54
  55         _, bb := <-c
  56         asBool(bb) // ERROR "cannot use.*type bool.*as type Bool"
  57         _, b = <-c // ERROR "cannot .* bool.*type Bool"
  58         _ = b
  59
  60         asString(String(slice)) // ok
  61 }