| // Copyright 2016 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 various valid and invalid struct assignments and conversions. |
| // Does not compile. |
| |
| package conversions2 |
| |
| type I interface { |
| m() |
| } |
| |
| // conversions between structs |
| |
| func _() { |
| type S struct{} |
| type T struct{} |
| var s S |
| var t T |
| var u struct{} |
| s = s |
| s = t // ERROR "cannot use .* in assignment" |
| s = u |
| s = S(s) |
| s = S(t) |
| s = S(u) |
| t = u |
| t = T(u) |
| } |
| |
| func _() { |
| type S struct{ x int } |
| type T struct { |
| x int "foo" |
| } |
| var s S |
| var t T |
| var u struct { |
| x int "bar" |
| } |
| s = s |
| s = t // ERROR "cannot use .* in assignment" |
| s = u // ERROR "cannot use .* in assignment" |
| s = S(s) |
| s = S(t) |
| s = S(u) |
| t = u // ERROR "cannot use .* in assignment" |
| t = T(u) |
| } |
| |
| func _() { |
| type E struct{ x int } |
| type S struct{ x E } |
| type T struct { |
| x E "foo" |
| } |
| var s S |
| var t T |
| var u struct { |
| x E "bar" |
| } |
| s = s |
| s = t // ERROR "cannot use .* in assignment" |
| s = u // ERROR "cannot use .* in assignment" |
| s = S(s) |
| s = S(t) |
| s = S(u) |
| t = u // ERROR "cannot use .* in assignment" |
| t = T(u) |
| } |
| |
| func _() { |
| type S struct { |
| x struct { |
| x int "foo" |
| } |
| } |
| type T struct { |
| x struct { |
| x int "bar" |
| } "foo" |
| } |
| var s S |
| var t T |
| var u struct { |
| x struct { |
| x int "bar" |
| } "bar" |
| } |
| s = s |
| s = t // ERROR "cannot use .* in assignment" |
| s = u // ERROR "cannot use .* in assignment" |
| s = S(s) |
| s = S(t) |
| s = S(u) |
| t = u // ERROR "cannot use .* in assignment" |
| t = T(u) |
| } |
| |
| func _() { |
| type E1 struct { |
| x int "foo" |
| } |
| type E2 struct { |
| x int "bar" |
| } |
| type S struct{ x E1 } |
| type T struct { |
| x E2 "foo" |
| } |
| var s S |
| var t T |
| var u struct { |
| x E2 "bar" |
| } |
| s = s |
| s = t // ERROR "cannot use .* in assignment" |
| s = u // ERROR "cannot use .* in assignment" |
| s = S(s) |
| s = S(t /* ERROR "cannot convert" */ ) |
| s = S(u /* ERROR "cannot convert" */ ) |
| t = u // ERROR "cannot use .* in assignment" |
| t = T(u) |
| } |
| |
| func _() { |
| type E struct{ x int } |
| type S struct { |
| f func(struct { |
| x int "foo" |
| }) |
| } |
| type T struct { |
| f func(struct { |
| x int "bar" |
| }) |
| } |
| var s S |
| var t T |
| var u struct{ f func(E) } |
| s = s |
| s = t // ERROR "cannot use .* in assignment" |
| s = u // ERROR "cannot use .* in assignment" |
| s = S(s) |
| s = S(t) |
| s = S(u /* ERROR "cannot convert" */ ) |
| t = u // ERROR "cannot use .* in assignment" |
| t = T(u /* ERROR "cannot convert" */ ) |
| } |
| |
| // conversions between pointers to structs |
| |
| func _() { |
| type S struct{} |
| type T struct{} |
| var s *S |
| var t *T |
| var u *struct{} |
| s = s |
| s = t // ERROR "cannot use .* in assignment" |
| s = u // ERROR "cannot use .* in assignment" |
| s = (*S)(s) |
| s = (*S)(t) |
| s = (*S)(u) |
| t = u // ERROR "cannot use .* in assignment" |
| t = (*T)(u) |
| } |
| |
| func _() { |
| type S struct{ x int } |
| type T struct { |
| x int "foo" |
| } |
| var s *S |
| var t *T |
| var u *struct { |
| x int "bar" |
| } |
| s = s |
| s = t // ERROR "cannot use .* in assignment" |
| s = u // ERROR "cannot use .* in assignment" |
| s = (*S)(s) |
| s = (*S)(t) |
| s = (*S)(u) |
| t = u // ERROR "cannot use .* in assignment" |
| t = (*T)(u) |
| } |
| |
| func _() { |
| type E struct{ x int } |
| type S struct{ x E } |
| type T struct { |
| x E "foo" |
| } |
| var s *S |
| var t *T |
| var u *struct { |
| x E "bar" |
| } |
| s = s |
| s = t // ERROR "cannot use .* in assignment" |
| s = u // ERROR "cannot use .* in assignment" |
| s = (*S)(s) |
| s = (*S)(t) |
| s = (*S)(u) |
| t = u // ERROR "cannot use .* in assignment" |
| t = (*T)(u) |
| } |
| |
| func _() { |
| type S struct { |
| x struct { |
| x int "foo" |
| } |
| } |
| type T struct { |
| x struct { |
| x int "bar" |
| } "foo" |
| } |
| var s *S |
| var t *T |
| var u *struct { |
| x struct { |
| x int "bar" |
| } "bar" |
| } |
| s = s |
| s = t // ERROR "cannot use .* in assignment" |
| s = u // ERROR "cannot use .* in assignment" |
| s = (*S)(s) |
| s = (*S)(t) |
| s = (*S)(u) |
| t = u // ERROR "cannot use .* in assignment" |
| t = (*T)(u) |
| } |
| |
| func _() { |
| type E1 struct { |
| x int "foo" |
| } |
| type E2 struct { |
| x int "bar" |
| } |
| type S struct{ x E1 } |
| type T struct { |
| x E2 "foo" |
| } |
| var s *S |
| var t *T |
| var u *struct { |
| x E2 "bar" |
| } |
| s = s |
| s = t // ERROR "cannot use .* in assignment" |
| s = u // ERROR "cannot use .* in assignment" |
| s = (*S)(s) |
| s = (*S)(t /* ERROR "cannot convert" */ ) |
| s = (*S)(u /* ERROR "cannot convert" */ ) |
| t = u // ERROR "cannot use .* in assignment" |
| t = (*T)(u) |
| } |
| |
| func _() { |
| type E struct{ x int } |
| type S struct { |
| f func(struct { |
| x int "foo" |
| }) |
| } |
| type T struct { |
| f func(struct { |
| x int "bar" |
| }) |
| } |
| var s *S |
| var t *T |
| var u *struct{ f func(E) } |
| s = s |
| s = t // ERROR "cannot use .* in assignment" |
| s = u // ERROR "cannot use .* in assignment" |
| s = (*S)(s) |
| s = (*S)(t) |
| s = (*S)(u /* ERROR "cannot convert" */ ) |
| t = u // ERROR "cannot use .* in assignment" |
| t = (*T)(u /* ERROR "cannot convert" */ ) |
| } |
| |
| func _() { |
| type E struct{ x int } |
| type S struct { |
| f func(*struct { |
| x int "foo" |
| }) |
| } |
| type T struct { |
| f func(*struct { |
| x int "bar" |
| }) |
| } |
| var s *S |
| var t *T |
| var u *struct{ f func(E) } |
| s = s |
| s = t // ERROR "cannot use .* in assignment" |
| s = u // ERROR "cannot use .* in assignment" |
| s = (*S)(s) |
| s = (*S)(t) |
| s = (*S)(u /* ERROR "cannot convert" */ ) |
| t = u // ERROR "cannot use .* in assignment" |
| t = (*T)(u /* ERROR "cannot convert" */ ) |
| } |