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go/test/typeparam/issue51522b.go
Keith Randall 2e46a0a997 cmd/compile: fix expression switches using type parameters
Both the thing we're switching on, as well as the cases we're switching for.
Convert anything containing a type parameter to interface{} before the
comparison happens.

Fixes #51522

Change-Id: I97ba9429ed332cb7d4240cb60f46d42226dcfa5f
Reviewed-on: https://go-review.googlesource.com/c/go/+/391594
Trust: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2022-03-10 19:30:33 +00:00

63 lines
730 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.
package main
func f[T comparable](i any) {
var t T
switch i {
case t:
// ok
default:
println("FAIL: switch i")
}
switch t {
case i:
// ok
default:
println("FAIL: switch t")
}
}
type myint int
func (m myint) foo() {
}
type fooer interface {
foo()
}
type comparableFoo interface {
comparable
foo()
}
func g[T comparableFoo](i fooer) {
var t T
switch i {
case t:
// ok
default:
println("FAIL: switch i")
}
switch t {
case i:
// ok
default:
println("FAIL: switch t")
}
}
func main() {
f[int](0)
g[myint](myint(0))
}