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go/test/typeparam/issue48013.go
Dan Scales 2dd7b770de cmd/compile: fix missing case for shape double-check function
Missing case types.TUNSAFEPTR in parameterizedBy().

Also realized there was the same missing case in the type substituter
(*Tsubster).Typ().

Fixes #48103

Change-Id: If71f1a6ef80932f0e2120d4c18b39a30189fd8fe
Reviewed-on: https://go-review.googlesource.com/c/go/+/346669
Reviewed-by: Keith Randall <khr@golang.org>
Trust: Dan Scales <danscales@google.com>
2021-09-01 02:51:18 +00:00

40 lines
630 B
Go

// run -gcflags=-G=3
// Copyright 2021 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
import (
"fmt"
"unsafe"
)
type S[T any] struct {
val T
}
// Test type substitution where base type is unsafe.Pointer
type U[T any] unsafe.Pointer
func test[T any]() T {
var q U[T]
var v struct {
// Test derived type that contains an unsafe.Pointer
p unsafe.Pointer
val T
}
_ = q
return v.val
}
func main() {
want := 0
got := test[int]()
if got != want {
panic(fmt.Sprintf("got %f, want %f", got, want))
}
}