mirror of
https://github.com/golang/go
synced 2024-11-22 20:24:47 -07:00
bdc6dbbc64
This change improves error message for recursive types.
Currently, compilation of the [following program](https://go.dev/play/p/3ef84ObpzfG):
package main
type T1[T T2] struct{}
type T2[T T1] struct{}
returns an error:
./prog.go:3:6: invalid recursive type T1
./prog.go:3:6: T1 refers to
./prog.go:4:6: T2 refers to
./prog.go:3:6: T1
With the patch applied the error message looks like:
./prog.go:3:6: invalid recursive type T1
./prog.go:3:6: T1 refers to T2
./prog.go:4:6: T2 refers to T1
Change-Id: Ic07cdffcffb1483c672b241fede4e694269b5b79
GitHub-Last-Rev: cd042fdc38
GitHub-Pull-Request: golang/go#69574
Reviewed-on: https://go-review.googlesource.com/c/go/+/614084
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Tim King <taking@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
37 lines
1.1 KiB
Go
37 lines
1.1 KiB
Go
// errorcheck
|
|
|
|
// Copyright 2020 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.
|
|
|
|
package p
|
|
|
|
type T1 struct { // ERROR "invalid recursive type T1\n.*T1 refers to T2\n.*T2 refers to T1|invalid recursive type"
|
|
f2 T2
|
|
}
|
|
|
|
type T2 struct { // GCCGO_ERROR "invalid recursive type"
|
|
f1 T1
|
|
}
|
|
|
|
type a b // GCCGO_ERROR "invalid recursive type"
|
|
type b c // ERROR "invalid recursive type b\n.*b refers to c\n.*c refers to b|invalid recursive type|invalid recursive type"
|
|
type c b // GCCGO_ERROR "invalid recursive type"
|
|
|
|
type d e
|
|
type e f
|
|
type f f // ERROR "invalid recursive type: f refers to itself|invalid recursive type|invalid recursive type"
|
|
|
|
type g struct { // ERROR "invalid recursive type: g refers to itself|invalid recursive type"
|
|
h struct {
|
|
g
|
|
}
|
|
}
|
|
|
|
type w x
|
|
type x y // ERROR "invalid recursive type x\n.*x refers to y\n.*y refers to z\n.*z refers to x|invalid recursive type"
|
|
type y struct{ z } // GCCGO_ERROR "invalid recursive type"
|
|
type z [10]x
|
|
|
|
type w2 w // refer to the type loop again
|