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6a5f7e8498
This CL handles I(x) where I is an interface type and x has typeparam type. Change-Id: Ib99de2b741d588947f5e0164255f6365e98acd8a Reviewed-on: https://go-review.googlesource.com/c/go/+/326189 Trust: Keith Randall <khr@golang.org> Trust: Dan Scales <danscales@google.com> Run-TryBot: Keith Randall <khr@golang.org> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Dan Scales <danscales@google.com>
66 lines
1.3 KiB
Go
66 lines
1.3 KiB
Go
// run -gcflags=-G=3
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// Copyright 2021 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 that we can convert type parameters to both empty
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// and nonempty interfaces, and named and nonnamed versions
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// thereof.
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package main
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import "fmt"
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type E interface{}
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func f[T any](x T) interface{} {
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var i interface{} = x
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return i
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}
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func g[T any](x T) E {
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var i E = x
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return i
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}
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type C interface {
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foo() int
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}
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type myInt int
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func (x myInt) foo() int {
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return int(x+1)
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}
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func h[T C](x T) interface{foo() int} {
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var i interface{foo()int} = x
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return i
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}
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func i[T C](x T) C {
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var i C = x // conversion in assignment
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return i
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}
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func j[T C](t T) C {
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return C(t) // explicit conversion
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}
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func main() {
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if got, want := f[int](7), 7; got != want {
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panic(fmt.Sprintf("got %d want %d", got, want))
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}
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if got, want := g[int](7), 7; got != want {
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panic(fmt.Sprintf("got %d want %d", got, want))
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}
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if got, want := h[myInt](7).foo(), 8; got != want {
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panic(fmt.Sprintf("got %d want %d", got, want))
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}
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if got, want := i[myInt](7).foo(), 8; got != want {
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panic(fmt.Sprintf("got %d want %d", got, want))
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}
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if got, want := j[myInt](7).foo(), 8; got != want {
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panic(fmt.Sprintf("got %d want %d", got, want))
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}
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}
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