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// errorcheck
// 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 main
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|incompatible type"
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|incompatible type"
s = u // ERROR "cannot use .* in assignment|incompatible type"
s = S(s)
s = S(t)
s = S(u)
t = u // ERROR "cannot use .* in assignment|incompatible type"
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|incompatible type"
s = u // ERROR "cannot use .* in assignment|incompatible type"
s = S(s)
s = S(t)
s = S(u)
t = u // ERROR "cannot use .* in assignment|incompatible type"
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|incompatible type"
s = u // ERROR "cannot use .* in assignment|incompatible type"
s = S(s)
s = S(t)
s = S(u)
t = u // ERROR "cannot use .* in assignment|incompatible type"
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|incompatible type"
s = u // ERROR "cannot use .* in assignment|incompatible type"
s = S(s)
s = S(t) // ERROR "cannot convert"
s = S(u) // ERROR "cannot convert"
t = u // ERROR "cannot use .* in assignment|incompatible type"
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|incompatible type"
s = u // ERROR "cannot use .* in assignment|incompatible type"
s = S(s)
s = S(t)
s = S(u) // ERROR "cannot convert"
t = u // ERROR "cannot use .* in assignment|incompatible type"
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|incompatible type"
s = u // ERROR "cannot use .* in assignment|incompatible type"
s = (*S)(s)
s = (*S)(t)
s = (*S)(u)
t = u // ERROR "cannot use .* in assignment|incompatible type"
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|incompatible type"
s = u // ERROR "cannot use .* in assignment|incompatible type"
s = (*S)(s)
s = (*S)(t)
s = (*S)(u)
t = u // ERROR "cannot use .* in assignment|incompatible type"
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|incompatible type"
s = u // ERROR "cannot use .* in assignment|incompatible type"
s = (*S)(s)
s = (*S)(t)
s = (*S)(u)
t = u // ERROR "cannot use .* in assignment|incompatible type"
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|incompatible type"
s = u // ERROR "cannot use .* in assignment|incompatible type"
s = (*S)(s)
s = (*S)(t)
s = (*S)(u)
t = u // ERROR "cannot use .* in assignment|incompatible type"
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|incompatible type"
s = u // ERROR "cannot use .* in assignment|incompatible type"
s = (*S)(s)
s = (*S)(t) // ERROR "cannot convert"
s = (*S)(u) // ERROR "cannot convert"
t = u // ERROR "cannot use .* in assignment|incompatible type"
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|incompatible type"
s = u // ERROR "cannot use .* in assignment|incompatible type"
s = (*S)(s)
s = (*S)(t)
s = (*S)(u) // ERROR "cannot convert"
t = u // ERROR "cannot use .* in assignment|incompatible type"
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|incompatible type"
s = u // ERROR "cannot use .* in assignment|incompatible type"
s = (*S)(s)
s = (*S)(t)
s = (*S)(u) // ERROR "cannot convert"
t = u // ERROR "cannot use .* in assignment|incompatible type"
t = (*T)(u) // ERROR "cannot convert"
}
func _() {
var s []byte
_ = ([4]byte)(s)
_ = (*[4]byte)(s)
type A [4]byte
_ = (A)(s)
_ = (*A)(s)
type P *[4]byte
_ = (P)(s)
_ = (*P)(s) // ERROR "cannot convert"
}