gcc/testsuite/go.test/test/declbad.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 short declarations and redeclarations are detected.
   8 // Does not compile.
   9
  10 package main
  11
  12 func f1() int                    { return 1 }
  13 func f2() (float32, int)         { return 1, 2 }
  14 func f3() (float32, int, string) { return 1, 2, "3" }
  15
  16 func main() {
  17         {
  18                 // simple redeclaration
  19                 i := f1()
  20                 i := f1() // ERROR "redeclared|no new"
  21                 _ = i
  22         }
  23         {
  24                 // change of type for f
  25                 i, f, s := f3()
  26                 f, g, t := f3() // ERROR "redeclared|cannot assign|incompatible"
  27                 _, _, _, _, _ = i, f, s, g, t
  28         }
  29         {
  30                 // change of type for i
  31                 i, f, s := f3()
  32                 j, i, t := f3() // ERROR "redeclared|cannot assign|incompatible"
  33                 _, _, _, _, _ = i, f, s, j, t
  34         }
  35         {
  36                 // no new variables
  37                 i, f, s := f3()
  38                 i, f := f2() // ERROR "redeclared|no new"
  39                 _, _, _ = i, f, s
  40         }
  41         {
  42                 // multiline no new variables
  43                 i := f1
  44                 i := func() int { // ERROR "redeclared|no new|incompatible"
  45                         return 0
  46                 }
  47                 _ = i
  48         }
  49         {
  50                 // single redeclaration
  51                 i, f, s := f3()
  52                 i := 1 // ERROR "redeclared|no new|incompatible"
  53                 _, _, _ = i, f, s
  54         }
  55         // double redeclaration
  56         {
  57                 i, f, s := f3()
  58                 i, f := f2() // ERROR "redeclared|no new"
  59                 _, _, _ = i, f, s
  60         }
  61         {
  62                 // triple redeclaration
  63                 i, f, s := f3()
  64                 i, f, s := f3() // ERROR "redeclared|no new"
  65                 _, _, _ = i, f, s
  66         }
  67 }