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Source file test/declbad.go

Documentation: test

  // errorcheck
  
  // Copyright 2009 The Go Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style
  // license that can be found in the LICENSE file.
  
  // Test that incorrect short declarations and redeclarations are detected.
  // Does not compile.
  
  package main
  
  func f1() int                    { return 1 }
  func f2() (float32, int)         { return 1, 2 }
  func f3() (float32, int, string) { return 1, 2, "3" }
  
  func main() {
  	{
  		// simple redeclaration
  		i := f1()
  		i := f1() // ERROR "redeclared|no new"
  		_ = i
  	}
  	{
  		// change of type for f
  		i, f, s := f3()
  		f, g, t := f3() // ERROR "redeclared|cannot assign|incompatible"
  		_, _, _, _, _ = i, f, s, g, t
  	}
  	{
  		// change of type for i
  		i, f, s := f3()
  		j, i, t := f3() // ERROR "redeclared|cannot assign|incompatible"
  		_, _, _, _, _ = i, f, s, j, t
  	}
  	{
  		// no new variables
  		i, f, s := f3()
  		i, f := f2() // ERROR "redeclared|no new"
  		_, _, _ = i, f, s
  	}
  	{
  		// multiline no new variables
  		i := f1
  		i := func() int { // ERROR "redeclared|no new|incompatible"
  			return 0
  		}
  		_ = i
  	}
  	{
  		// single redeclaration
  		i, f, s := f3()
  		i := 1 // ERROR "redeclared|no new|incompatible"
  		_, _, _ = i, f, s
  	}
  	// double redeclaration
  	{
  		i, f, s := f3()
  		i, f := f2() // ERROR "redeclared|no new"
  		_, _, _ = i, f, s
  	}
  	{
  		// triple redeclaration
  		i, f, s := f3()
  		i, f, s := f3() // ERROR "redeclared|no new"
  		_, _, _ = i, f, s
  	}
  }
  

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