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https://github.com/golang/go
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e24977d231
The next CL will remove the -G flag, effectively hard-coding it to its current default (-G=3). Change-Id: Ib4743b529206928f9f1cca9fdb19989728327831 Reviewed-on: https://go-review.googlesource.com/c/go/+/388534 Reviewed-by: Keith Randall <khr@golang.org> Trust: Matthew Dempsky <mdempsky@google.com> Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
41 lines
1008 B
Go
41 lines
1008 B
Go
// run
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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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package main
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import "fmt"
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type Exp[Ty any] interface {
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Eval() Ty
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}
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// For now, a lone type parameter is not permitted as RHS in a type declaration (issue #45639).
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// type Lit[Ty any] Ty
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//
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// func (lit Lit[Ty]) Eval() Ty { return Ty(lit) }
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// func (lit Lit[Ty]) String() string { return fmt.Sprintf("(lit %v)", Ty(lit)) }
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type Eq[Ty any] struct {
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a Exp[Ty]
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b Exp[Ty]
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}
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func (e Eq[Ty]) String() string {
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return fmt.Sprintf("(eq %v %v)", e.a, e.b)
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}
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// For now, a lone type parameter is not permitted as RHS in a type declaration (issue #45639).
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// var (
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// e0 = Eq[int]{Lit[int](128), Lit[int](64)}
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// e1 = Eq[bool]{Lit[bool](true), Lit[bool](true)}
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// )
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func main() {
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// For now, a lone type parameter is not permitted as RHS in a type declaration (issue #45639).
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// fmt.Printf("%v\n", e0)
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// fmt.Printf("%v\n", e1)
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}
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