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go/test/fixedbugs/issue23536.go
Dan Scales f1596d76f4 cmd/compile: fix conv of slice of user-define byte type to string
types2 allows the conversion of a slice of a user-defined byte type B
(not builtin uint8 or byte) to string. But runtime.slicebytetostring
requires a []byte argument, so add in a CONVNOP from []B to []byte if
needed. Same for the conversion of a slice of user-defined rune types to
string.

I made the same change in the transformations of the old typechecker, so
as to keep tcConv() and transformConv() in sync. That fixes the bug for
-G=0 mode as well.

Fixes #23536

Change-Id: Ic79364427f27489187f3f8015bdfbf0769a70d69
Reviewed-on: https://go-review.googlesource.com/c/go/+/376056
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Keith Randall <khr@golang.org>
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-01-07 18:40:16 +00:00

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428 B
Go

// run
// Copyright 2022 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 case where a slice of a user-defined byte type (not uint8 or byte) is
// converted to a string. Same for slice of runes.
package main
type MyByte byte
type MyRune rune
func main() {
var y []MyByte
_ = string(y)
var z []MyRune
_ = string(z)
}