mirror of
https://github.com/golang/go
synced 2024-09-05 07:54:46 +00:00
![Robert Griesemer](/assets/img/avatar_default.png)
For #46505. Change-Id: I9bc9da5dd4b76cb2d8ff41390e1567678e72d88d Reviewed-on: https://go-review.googlesource.com/c/go/+/428938 Run-TryBot: Robert Griesemer <gri@google.com> Reviewed-by: Robert Findley <rfindley@google.com> Auto-Submit: Robert Griesemer <gri@google.com> Reviewed-by: Robert Griesemer <gri@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
330 lines
5.9 KiB
Go
330 lines
5.9 KiB
Go
// 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"
|
|
}
|