github.com/zach-klippenstein/go@v0.0.0-20150108044943-fcfbeb3adf58/test/assign1.go (about)

     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 assignment rules are enforced by the compiler.
     8  // Does not compile.
     9  
    10  package main
    11  
    12  type (
    13  	A [10]int
    14  	B []int
    15  	C chan int
    16  	F func() int
    17  	I interface {
    18  		m() int
    19  	}
    20  	M map[int]int
    21  	P *int
    22  	S struct {
    23  		X int
    24  	}
    25  
    26  	A1 [10]int
    27  	B1 []int
    28  	C1 chan int
    29  	F1 func() int
    30  	I1 interface {
    31  		m() int
    32  	}
    33  	M1 map[int]int
    34  	P1 *int
    35  	S1 struct {
    36  		X int
    37  	}
    38  )
    39  
    40  var (
    41  	a0 [10]int
    42  	b0 []int
    43  	c0 chan int
    44  	f0 func() int
    45  	i0 interface {
    46  		m() int
    47  	}
    48  	m0 map[int]int
    49  	p0 *int
    50  	s0 struct {
    51  		X int
    52  	}
    53  
    54  	a A
    55  	b B
    56  	c C
    57  	f F
    58  	i I
    59  	m M
    60  	p P
    61  	s S
    62  
    63  	a1 A1
    64  	b1 B1
    65  	c1 C1
    66  	f1 F1
    67  	i1 I1
    68  	m1 M1
    69  	p1 P1
    70  	s1 S1
    71  
    72  	pa0 *[10]int
    73  	pb0 *[]int
    74  	pc0 *chan int
    75  	pf0 *func() int
    76  	pi0 *interface {
    77  		m() int
    78  	}
    79  	pm0 *map[int]int
    80  	pp0 **int
    81  	ps0 *struct {
    82  		X int
    83  	}
    84  
    85  	pa *A
    86  	pb *B
    87  	pc *C
    88  	pf *F
    89  	pi *I
    90  	pm *M
    91  	pp *P
    92  	ps *S
    93  
    94  	pa1 *A1
    95  	pb1 *B1
    96  	pc1 *C1
    97  	pf1 *F1
    98  	pi1 *I1
    99  	pm1 *M1
   100  	pp1 *P1
   101  	ps1 *S1
   102  )
   103  
   104  func main() {
   105  	a0 = a
   106  	a0 = a1
   107  	a = a0
   108  	a = a1 // ERROR "cannot use"
   109  	a1 = a0
   110  	a1 = a // ERROR "cannot use"
   111  
   112  	b0 = b
   113  	b0 = b1
   114  	b = b0
   115  	b = b1 // ERROR "cannot use"
   116  	b1 = b0
   117  	b1 = b // ERROR "cannot use"
   118  
   119  	c0 = c
   120  	c0 = c1
   121  	c = c0
   122  	c = c1 // ERROR "cannot use"
   123  	c1 = c0
   124  	c1 = c // ERROR "cannot use"
   125  
   126  	f0 = f
   127  	f0 = f1
   128  	f = f0
   129  	f = f1 // ERROR "cannot use"
   130  	f1 = f0
   131  	f1 = f // ERROR "cannot use"
   132  
   133  	i0 = i
   134  	i0 = i1
   135  	i = i0
   136  	i = i1
   137  	i1 = i0
   138  	i1 = i
   139  
   140  	m0 = m
   141  	m0 = m1
   142  	m = m0
   143  	m = m1 // ERROR "cannot use"
   144  	m1 = m0
   145  	m1 = m // ERROR "cannot use"
   146  
   147  	p0 = p
   148  	p0 = p1
   149  	p = p0
   150  	p = p1 // ERROR "cannot use"
   151  	p1 = p0
   152  	p1 = p // ERROR "cannot use"
   153  
   154  	s0 = s
   155  	s0 = s1
   156  	s = s0
   157  	s = s1 // ERROR "cannot use"
   158  	s1 = s0
   159  	s1 = s // ERROR "cannot use"
   160  
   161  	pa0 = pa  // ERROR "cannot use|incompatible"
   162  	pa0 = pa1 // ERROR "cannot use|incompatible"
   163  	pa = pa0  // ERROR "cannot use|incompatible"
   164  	pa = pa1  // ERROR "cannot use|incompatible"
   165  	pa1 = pa0 // ERROR "cannot use|incompatible"
   166  	pa1 = pa  // ERROR "cannot use|incompatible"
   167  
   168  	pb0 = pb  // ERROR "cannot use|incompatible"
   169  	pb0 = pb1 // ERROR "cannot use|incompatible"
   170  	pb = pb0  // ERROR "cannot use|incompatible"
   171  	pb = pb1  // ERROR "cannot use|incompatible"
   172  	pb1 = pb0 // ERROR "cannot use|incompatible"
   173  	pb1 = pb  // ERROR "cannot use|incompatible"
   174  
   175  	pc0 = pc  // ERROR "cannot use|incompatible"
   176  	pc0 = pc1 // ERROR "cannot use|incompatible"
   177  	pc = pc0  // ERROR "cannot use|incompatible"
   178  	pc = pc1  // ERROR "cannot use|incompatible"
   179  	pc1 = pc0 // ERROR "cannot use|incompatible"
   180  	pc1 = pc  // ERROR "cannot use|incompatible"
   181  
   182  	pf0 = pf  // ERROR "cannot use|incompatible"
   183  	pf0 = pf1 // ERROR "cannot use|incompatible"
   184  	pf = pf0  // ERROR "cannot use|incompatible"
   185  	pf = pf1  // ERROR "cannot use|incompatible"
   186  	pf1 = pf0 // ERROR "cannot use|incompatible"
   187  	pf1 = pf  // ERROR "cannot use|incompatible"
   188  
   189  	pi0 = pi  // ERROR "cannot use|incompatible"
   190  	pi0 = pi1 // ERROR "cannot use|incompatible"
   191  	pi = pi0  // ERROR "cannot use|incompatible"
   192  	pi = pi1  // ERROR "cannot use|incompatible"
   193  	pi1 = pi0 // ERROR "cannot use|incompatible"
   194  	pi1 = pi  // ERROR "cannot use|incompatible"
   195  
   196  	pm0 = pm  // ERROR "cannot use|incompatible"
   197  	pm0 = pm1 // ERROR "cannot use|incompatible"
   198  	pm = pm0  // ERROR "cannot use|incompatible"
   199  	pm = pm1  // ERROR "cannot use|incompatible"
   200  	pm1 = pm0 // ERROR "cannot use|incompatible"
   201  	pm1 = pm  // ERROR "cannot use|incompatible"
   202  
   203  	pp0 = pp  // ERROR "cannot use|incompatible"
   204  	pp0 = pp1 // ERROR "cannot use|incompatible"
   205  	pp = pp0  // ERROR "cannot use|incompatible"
   206  	pp = pp1  // ERROR "cannot use|incompatible"
   207  	pp1 = pp0 // ERROR "cannot use|incompatible"
   208  	pp1 = pp  // ERROR "cannot use|incompatible"
   209  
   210  	ps0 = ps  // ERROR "cannot use|incompatible"
   211  	ps0 = ps1 // ERROR "cannot use|incompatible"
   212  	ps = ps0  // ERROR "cannot use|incompatible"
   213  	ps = ps1  // ERROR "cannot use|incompatible"
   214  	ps1 = ps0 // ERROR "cannot use|incompatible"
   215  	ps1 = ps  // ERROR "cannot use|incompatible"
   216  
   217  
   218  	a0 = [10]int(a)
   219  	a0 = [10]int(a1)
   220  	a = A(a0)
   221  	a = A(a1)
   222  	a1 = A1(a0)
   223  	a1 = A1(a)
   224  
   225  	b0 = []int(b)
   226  	b0 = []int(b1)
   227  	b = B(b0)
   228  	b = B(b1)
   229  	b1 = B1(b0)
   230  	b1 = B1(b)
   231  
   232  	c0 = chan int(c)
   233  	c0 = chan int(c1)
   234  	c = C(c0)
   235  	c = C(c1)
   236  	c1 = C1(c0)
   237  	c1 = C1(c)
   238  
   239  	f0 = func() int(f)
   240  	f0 = func() int(f1)
   241  	f = F(f0)
   242  	f = F(f1)
   243  	f1 = F1(f0)
   244  	f1 = F1(f)
   245  
   246  	i0 = interface {
   247  		m() int
   248  	}(i)
   249  	i0 = interface {
   250  		m() int
   251  	}(i1)
   252  	i = I(i0)
   253  	i = I(i1)
   254  	i1 = I1(i0)
   255  	i1 = I1(i)
   256  
   257  	m0 = map[int]int(m)
   258  	m0 = map[int]int(m1)
   259  	m = M(m0)
   260  	m = M(m1)
   261  	m1 = M1(m0)
   262  	m1 = M1(m)
   263  
   264  	p0 = (*int)(p)
   265  	p0 = (*int)(p1)
   266  	p = P(p0)
   267  	p = P(p1)
   268  	p1 = P1(p0)
   269  	p1 = P1(p)
   270  
   271  	s0 = struct {
   272  		X int
   273  	}(s)
   274  	s0 = struct {
   275  		X int
   276  	}(s1)
   277  	s = S(s0)
   278  	s = S(s1)
   279  	s1 = S1(s0)
   280  	s1 = S1(s)
   281  
   282  	pa0 = (*[10]int)(pa)
   283  	pa0 = (*[10]int)(pa1)
   284  	pa = (*A)(pa0)
   285  	pa = (*A)(pa1)
   286  	pa1 = (*A1)(pa0)
   287  	pa1 = (*A1)(pa)
   288  
   289  	pb0 = (*[]int)(pb)
   290  	pb0 = (*[]int)(pb1)
   291  	pb = (*B)(pb0)
   292  	pb = (*B)(pb1)
   293  	pb1 = (*B1)(pb0)
   294  	pb1 = (*B1)(pb)
   295  
   296  	pc0 = (*chan int)(pc)
   297  	pc0 = (*chan int)(pc1)
   298  	pc = (*C)(pc0)
   299  	pc = (*C)(pc1)
   300  	pc1 = (*C1)(pc0)
   301  	pc1 = (*C1)(pc)
   302  
   303  	pf0 = (*func() int)(pf)
   304  	pf0 = (*func() int)(pf1)
   305  	pf = (*F)(pf0)
   306  	pf = (*F)(pf1)
   307  	pf1 = (*F1)(pf0)
   308  	pf1 = (*F1)(pf)
   309  
   310  	pi0 = (*interface {
   311  		m() int
   312  	})(pi)
   313  	pi0 = (*interface {
   314  		m() int
   315  	})(pi1)
   316  	pi = (*I)(pi0)
   317  	pi = (*I)(pi1)
   318  	pi1 = (*I1)(pi0)
   319  	pi1 = (*I1)(pi)
   320  
   321  	pm0 = (*map[int]int)(pm)
   322  	pm0 = (*map[int]int)(pm1)
   323  	pm = (*M)(pm0)
   324  	pm = (*M)(pm1)
   325  	pm1 = (*M1)(pm0)
   326  	pm1 = (*M1)(pm)
   327  
   328  	pp0 = (**int)(pp)
   329  	pp0 = (**int)(pp1)
   330  	pp = (*P)(pp0)
   331  	pp = (*P)(pp1)
   332  	pp1 = (*P1)(pp0)
   333  	pp1 = (*P1)(pp)
   334  
   335  	ps0 = (*struct {
   336  		X int
   337  	})(ps)
   338  	ps0 = (*struct {
   339  		X int
   340  	})(ps1)
   341  	ps = (*S)(ps0)
   342  	ps = (*S)(ps1)
   343  	ps1 = (*S1)(ps0)
   344  	ps1 = (*S1)(ps)
   345  
   346  }