mirror of
https://github.com/golang/go
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39055700b1
Implementation of spec change https://golang.org/cl/24190/. For #16085. Change-Id: Id71ef29af5031b073e8be163f578d1bb768ff97a Reviewed-on: https://go-review.googlesource.com/30169 Reviewed-by: Matthew Dempsky <mdempsky@google.com>
316 lines
5 KiB
Go
316 lines
5 KiB
Go
// errorcheck
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// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Test various valid and invalid struct assignments and conversions.
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// Does not compile.
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package main
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type I interface {
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m()
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}
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// conversions between structs
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func _() {
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type S struct{}
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type T struct{}
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var s S
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var t T
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var u struct{}
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s = s
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s = t // ERROR "cannot use .* in assignment"
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s = u
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s = S(s)
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s = S(t)
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s = S(u)
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t = u
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t = T(u)
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}
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func _() {
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type S struct{ x int }
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type T struct {
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x int "foo"
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}
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var s S
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var t T
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var u struct {
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x int "bar"
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}
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s = s
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s = t // ERROR "cannot use .* in assignment"
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s = u // ERROR "cannot use .* in assignment"
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s = S(s)
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s = S(t)
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s = S(u)
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t = u // ERROR "cannot use .* in assignment"
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t = T(u)
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}
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func _() {
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type E struct{ x int }
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type S struct{ x E }
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type T struct {
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x E "foo"
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}
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var s S
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var t T
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var u struct {
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x E "bar"
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}
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s = s
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s = t // ERROR "cannot use .* in assignment"
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s = u // ERROR "cannot use .* in assignment"
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s = S(s)
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s = S(t)
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s = S(u)
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t = u // ERROR "cannot use .* in assignment"
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t = T(u)
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}
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func _() {
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type S struct {
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x struct {
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x int "foo"
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}
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}
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type T struct {
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x struct {
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x int "bar"
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} "foo"
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}
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var s S
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var t T
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var u struct {
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x struct {
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x int "bar"
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} "bar"
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}
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s = s
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s = t // ERROR "cannot use .* in assignment"
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s = u // ERROR "cannot use .* in assignment"
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s = S(s)
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s = S(t)
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s = S(u)
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t = u // ERROR "cannot use .* in assignment"
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t = T(u)
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}
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func _() {
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type E1 struct {
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x int "foo"
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}
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type E2 struct {
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x int "bar"
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}
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type S struct{ x E1 }
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type T struct {
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x E2 "foo"
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}
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var s S
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var t T
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var u struct {
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x E2 "bar"
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}
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s = s
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s = t // ERROR "cannot use .* in assignment"
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s = u // ERROR "cannot use .* in assignment"
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s = S(s)
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s = S(t) // ERROR "cannot convert"
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s = S(u) // ERROR "cannot convert"
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t = u // ERROR "cannot use .* in assignment"
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t = T(u)
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}
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func _() {
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type E struct{ x int }
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type S struct {
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f func(struct {
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x int "foo"
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})
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}
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type T struct {
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f func(struct {
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x int "bar"
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})
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}
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var s S
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var t T
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var u struct{ f func(E) }
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s = s
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s = t // ERROR "cannot use .* in assignment"
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s = u // ERROR "cannot use .* in assignment"
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s = S(s)
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s = S(t)
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s = S(u) // ERROR "cannot convert"
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t = u // ERROR "cannot use .* in assignment"
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t = T(u) // ERROR "cannot convert"
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}
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// conversions between pointers to structs
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func _() {
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type S struct{}
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type T struct{}
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var s *S
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var t *T
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var u *struct{}
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s = s
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s = t // ERROR "cannot use .* in assignment"
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s = u // ERROR "cannot use .* in assignment"
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s = (*S)(s)
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s = (*S)(t)
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s = (*S)(u)
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t = u // ERROR "cannot use .* in assignment"
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t = (*T)(u)
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}
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func _() {
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type S struct{ x int }
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type T struct {
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x int "foo"
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}
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var s *S
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var t *T
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var u *struct {
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x int "bar"
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}
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s = s
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s = t // ERROR "cannot use .* in assignment"
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s = u // ERROR "cannot use .* in assignment"
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s = (*S)(s)
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s = (*S)(t)
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s = (*S)(u)
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t = u // ERROR "cannot use .* in assignment"
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t = (*T)(u)
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}
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func _() {
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type E struct{ x int }
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type S struct{ x E }
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type T struct {
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x E "foo"
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}
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var s *S
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var t *T
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var u *struct {
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x E "bar"
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}
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s = s
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s = t // ERROR "cannot use .* in assignment"
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s = u // ERROR "cannot use .* in assignment"
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s = (*S)(s)
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s = (*S)(t)
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s = (*S)(u)
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t = u // ERROR "cannot use .* in assignment"
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t = (*T)(u)
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}
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func _() {
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type S struct {
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x struct {
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x int "foo"
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}
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}
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type T struct {
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x struct {
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x int "bar"
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} "foo"
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}
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var s *S
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var t *T
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var u *struct {
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x struct {
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x int "bar"
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} "bar"
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}
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s = s
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s = t // ERROR "cannot use .* in assignment"
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s = u // ERROR "cannot use .* in assignment"
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s = (*S)(s)
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s = (*S)(t)
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s = (*S)(u)
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t = u // ERROR "cannot use .* in assignment"
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t = (*T)(u)
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}
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func _() {
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type E1 struct {
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x int "foo"
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}
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type E2 struct {
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x int "bar"
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}
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type S struct{ x E1 }
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type T struct {
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x E2 "foo"
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}
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var s *S
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var t *T
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var u *struct {
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x E2 "bar"
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}
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s = s
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s = t // ERROR "cannot use .* in assignment"
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s = u // ERROR "cannot use .* in assignment"
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s = (*S)(s)
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s = (*S)(t) // ERROR "cannot convert"
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s = (*S)(u) // ERROR "cannot convert"
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t = u // ERROR "cannot use .* in assignment"
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t = (*T)(u)
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}
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func _() {
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type E struct{ x int }
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type S struct {
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f func(struct {
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x int "foo"
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})
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}
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type T struct {
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f func(struct {
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x int "bar"
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})
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}
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var s *S
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var t *T
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var u *struct{ f func(E) }
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s = s
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s = t // ERROR "cannot use .* in assignment"
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s = u // ERROR "cannot use .* in assignment"
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s = (*S)(s)
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s = (*S)(t)
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s = (*S)(u) // ERROR "cannot convert"
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t = u // ERROR "cannot use .* in assignment"
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t = (*T)(u) // ERROR "cannot convert"
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}
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func _() {
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type E struct{ x int }
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type S struct {
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f func(*struct {
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x int "foo"
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})
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}
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type T struct {
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f func(*struct {
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x int "bar"
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})
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}
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var s *S
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var t *T
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var u *struct{ f func(E) }
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s = s
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s = t // ERROR "cannot use .* in assignment"
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s = u // ERROR "cannot use .* in assignment"
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s = (*S)(s)
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s = (*S)(t)
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s = (*S)(u) // ERROR "cannot convert"
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t = u // ERROR "cannot use .* in assignment"
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t = (*T)(u) // ERROR "cannot convert"
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}
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