golang pre_go118 代码
文件路径：/src/vendor/golang.org/x/net/idna/pre_go118.go
// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
// 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.
//go:build !go1.18
// +build !go1.18
package idna
const transitionalLookup = true