Source file test/assign.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  // Verify simple assignment errors are caught by the compiler.
     8  // Does not compile.
     9  
    10  package main
    11  
    12  import (
    13  	"sync"
    14  	"time"
    15  )
    16  
    17  type T struct {
    18  	int
    19  	sync.Mutex
    20  }
    21  
    22  func main() {
    23  	{
    24  		var x, y sync.Mutex
    25  		x = y // ok
    26  		_ = x
    27  	}
    28  	{
    29  		var x, y T
    30  		x = y // ok
    31  		_ = x
    32  	}
    33  	{
    34  		var x, y [2]sync.Mutex
    35  		x = y // ok
    36  		_ = x
    37  	}
    38  	{
    39  		var x, y [2]T
    40  		x = y // ok
    41  		_ = x
    42  	}
    43  	{
    44  		x := time.Time{0, 0, nil} // ERROR "assignment.*Time"
    45  		_ = x
    46  	}
    47  	{
    48  		x := sync.Mutex{key: 0} // ERROR "(unknown|assignment).*Mutex"
    49  		_ = x
    50  	}
    51  	{
    52  		x := &sync.Mutex{} // ok
    53  		var y sync.Mutex   // ok
    54  		y = *x             // ok
    55  		*x = y             // ok
    56  		_ = x
    57  		_ = y
    58  	}
    59  	{
    60  		var x = 1
    61  		{
    62  			x, x := 2, 3 // ERROR ".*x.* repeated on left side of :=|x redeclared in this block"
    63  			_ = x
    64  		}
    65  		_ = x
    66  	}
    67  	{
    68  		a, a := 1, 2 // ERROR ".*a.* repeated on left side of :=|a redeclared in this block"
    69  		_ = a
    70  	}
    71  }
    72  

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