vendor/golang.org/x/text/internal/language/compact/language.go

这里只显示每个文件的开头 60 行。登录后可以解锁完整代码。

微信扫码关注公众号，代码整理好后第一时间通知你。

// Copyright 2013 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:generate go run gen.go gen_index.go -output tables.go
//go:generate go run gen_parents.go

package compact

// TODO: Remove above NOTE after:
// - verifying that tables are dropped correctly (most notably matcher tables).

import (
	"strings"

	"golang.org/x/text/internal/language"
)

// Tag represents a BCP 47 language tag. It is used to specify an instance of a
// specific language or locale. All language tag values are guaranteed to be
// well-formed.
type Tag struct {
	// NOTE: exported tags will become part of the public API.
	language ID
	locale   ID
	full     fullTag // always a language.Tag for now.
}

const _und = 0

type fullTag interface {
	IsRoot() bool
	Parent() language.Tag
}

// Make a compact Tag from a fully specified internal language Tag.
func Make(t language.Tag) (tag Tag) {
	if region := t.TypeForKey("rg"); len(region) == 6 && region[2:] == "zzzz" {
		if r, err := language.ParseRegion(region[:2]); err == nil {
			tFull := t
			t, _ = t.SetTypeForKey("rg", "")
			// TODO: should we not consider "va" for the language tag?
			var exact1, exact2 bool
			tag.language, exact1 = FromTag(t)
			t.RegionID = r
			tag.locale, exact2 = FromTag(t)
			if !exact1 || !exact2 {
				tag.full = tFull
			}
			return tag
		}
	}
	lang, ok := FromTag(t)
	tag.language = lang
	tag.locale = lang
	if !ok {
		tag.full = t
	}
	return tag
}