gcc/testsuite/go.test/test/blank1.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 incorrect uses of the blank identifier are caught.
   8 // Does not compile.
   9
  10 package _       // ERROR "invalid package name"
  11
  12 var t struct {
  13         _ int
  14 }
  15
  16 func (x int) _() { // ERROR "methods on non-local type"
  17         println(x)
  18 }
  19
  20 type T struct {
  21       _ []int
  22 }
  23
  24 func main() {
  25         _()     // ERROR "cannot use .* as value"
  26         x := _+1        // ERROR "cannot use .* as value"
  27         _ = x
  28         _ = t._ // ERROR "cannot refer to blank field|invalid use of"
  29
  30       var v1, v2 T
  31       _ = v1 == v2 // ERROR "cannot be compared|non-comparable"
  32 }