func ExampleCompose() {
nl, _ := language.ParseBase("nl")
us, _ := language.ParseRegion("US")
de := language.Make("de-1901-u-co-phonebk")
jp := language.Make("ja-JP")
fi := language.Make("fi-x-ing")
u, _ := language.ParseExtension("u-nu-arabic")
x, _ := language.ParseExtension("x-piglatin")
// Combine a base language and region.
fmt.Println(language.Compose(nl, us))
// Combine a base language and extension.
fmt.Println(language.Compose(nl, x))
// Replace the region.
fmt.Println(language.Compose(jp, us))
// Combine several tags.
fmt.Println(language.Compose(us, nl, u))
// Replace the base language of a tag.
fmt.Println(language.Compose(de, nl))
fmt.Println(language.Compose(de, nl, u))
// Remove the base language.
fmt.Println(language.Compose(de, language.Base{}))
// Remove all variants.
fmt.Println(language.Compose(de, []language.Variant{}))
// Remove all extensions.
fmt.Println(language.Compose(de, []language.Extension{}))
fmt.Println(language.Compose(fi, []language.Extension{}))
// Remove all variants and extensions.
fmt.Println(language.Compose(de.Raw()))
// An error is gobbled or returned if non-nil.
fmt.Println(language.Compose(language.ParseRegion("ZA")))
fmt.Println(language.Compose(language.ParseRegion("HH")))
// Compose uses the same Default canonicalization as Make.
fmt.Println(language.Compose(language.Raw.Parse("en-Latn-UK")))
// Call compose on a different CanonType for different results.
fmt.Println(language.All.Compose(language.Raw.Parse("en-Latn-UK")))
// Output:
// nl-US <nil>
// nl-x-piglatin <nil>
// ja-US <nil>
// nl-US-u-nu-arabic <nil>
// nl-1901-u-co-phonebk <nil>
// nl-1901-u-nu-arabic <nil>
// und-1901-u-co-phonebk <nil>
// de-u-co-phonebk <nil>
// de-1901 <nil>
// fi <nil>
// de <nil>
// und-ZA <nil>
// und language: subtag "HH" is well-formed but unknown
// en-Latn-GB <nil>
// en-GB <nil>
}
func ExampleID_Region() {
ru := language.Make("ru")
en := language.Make("en")
fmt.Println(ru.Region())
fmt.Println(en.Region())
// Output:
// RU Low
// US Low
}
func ExampleID_Base() {
fmt.Println(language.Make("und").Base())
fmt.Println(language.Make("und-US").Base())
fmt.Println(language.Make("und-NL").Base())
fmt.Println(language.Make("und-419").Base())
fmt.Println(language.Make("und-ZZ").Base())
// Output:
// en Low
// en High
// nl High
// en Low
// en Low
}
func ExampleTag_Base() {
fmt.Println(language.Make("und").Base())
fmt.Println(language.Make("und-US").Base())
fmt.Println(language.Make("und-NL").Base())
fmt.Println(language.Make("und-419").Base()) // Latin America
fmt.Println(language.Make("und-ZZ").Base())
// Output:
// en Low
// en High
// nl High
// es Low
// en Low
}
func ExampleTags() {
n := display.Tags(language.English)
fmt.Println(n.Name(language.Make("nl")))
fmt.Println(n.Name(language.Make("nl-BE")))
fmt.Println(n.Name(language.Make("nl-CW")))
fmt.Println(n.Name(language.Make("nl-Arab")))
fmt.Println(n.Name(language.Make("nl-Cyrl-RU")))
// Output:
// Dutch
// Flemish
// Dutch (Curaçao)
// Dutch (Arabic)
// Dutch (Cyrillic, Russia)
}
// parseMain parses XML files in the main directory of the CLDR core.zip file.
func parseMain() {
d := &cldr.Decoder{}
d.SetDirFilter("main")
d.SetSectionFilter("characters")
data := decodeCLDR(d)
for _, loc := range data.Locales() {
x := data.RawLDML(loc)
if skipLang(x.Identity.Language.Type) {
continue
}
if x.Characters != nil {
x, _ = data.LDML(loc)
loc = language.Make(loc).String()
for _, ec := range x.Characters.ExemplarCharacters {
if ec.Draft != "" {
continue
}
if _, ok := localeChars[loc]; !ok {
mainLocales = append(mainLocales, loc)
localeChars[loc] = make(charSets)
}
localeChars[loc][ec.Type] = parseCharacters(ec.Data())
}
}
}
}
func ExampleID_Part() {
loc := language.Make("sr-RS")
script := loc.Part(language.ScriptPart)
region := loc.Part(language.RegionPart)
fmt.Printf("%q %q", script, region)
// Output: "" "RS"
}
func ExampleParent() {
p := func(tag string) {
fmt.Printf("parent(%v): %v\n", tag, language.Make(tag).Parent())
}
p("zh-CN")
// Australian English inherits from British English.
p("en-AU")
// If the tag has a different maximized script from its parent, a tag with
// this maximized script is inserted. This allows different language tags
// which have the same base language and script in common to inherit from
// a common set of settings.
p("zh-HK")
// If the maximized script of the parent is not identical, CLDR will skip
// inheriting from it, as it means there will not be many entries in common
// and inheriting from it is nonsensical.
p("zh-Hant")
// The parent of a tag with variants and extensions is the tag with all
// variants and extensions removed.
p("de-1994-u-co-phonebk")
// Remove default script.
p("de-Latn-LU")
// Output:
// parent(zh-CN): zh
// parent(en-AU): en-GB
// parent(zh-HK): zh-Hant
// parent(zh-Hant): und
// parent(de-1994-u-co-phonebk): de
// parent(de-Latn-LU): de
}
func ExampleID_Script() {
en := language.Make("en")
sr := language.Make("sr")
sr_Latn := language.Make("sr_Latn")
fmt.Println(en.Script())
fmt.Println(sr.Script())
// Was a script explicitly specified?
_, c := sr.Script()
fmt.Println(c == language.Exact)
_, c = sr_Latn.Script()
fmt.Println(c == language.Exact)
// Output:
// Latn High
// Cyrl Low
// false
// true
}
// Supported returns the list of languages for which collating differs from its parent.
func Supported() []language.Tag {
ids := strings.Split(availableLocales, ",")
tags := make([]language.Tag, len(ids))
for i, s := range ids {
tags[i] = language.Make(s)
}
return tags
}
// ExampleDictionary shows how to reduce the amount of data linked into your
// binary by only using the predefined Dictionary variables of the languages you
// wish to support.
func ExampleDictionary() {
tags := []language.Tag{
language.English,
language.German,
language.Japanese,
language.Russian,
}
dicts := []*display.Dictionary{
display.English,
display.German,
display.Japanese,
display.Russian,
}
m := language.NewMatcher(tags)
getDict := func(t language.Tag) *display.Dictionary {
_, i, confidence := m.Match(t)
// Skip this check if you want to support a fall-back language, which
// will be the first one passed to NewMatcher.
if confidence == language.No {
return nil
}
return dicts[i]
}
// The matcher will match Swiss German to German.
n := getDict(language.Make("gsw")).Languages()
fmt.Println(n.Name(language.German))
fmt.Println(n.Name(language.Make("de-CH")))
fmt.Println(n.Name(language.Make("gsw")))
// Output:
// Deutsch
// Schweizer Hochdeutsch
// Schweizerdeutsch
}
func ExampleTag_ComprehensibleTo() {
// Various levels of comprehensibility.
fmt.Println(language.English.ComprehensibleTo(language.English))
fmt.Println(language.BritishEnglish.ComprehensibleTo(language.AmericanEnglish))
// An explicit Und results in no match.
fmt.Println(language.Und.ComprehensibleTo(language.English))
fmt.Println("----")
// There is usually no mutual comprehensibility between different scripts.
fmt.Println(language.English.ComprehensibleTo(language.Make("en-Dsrt")))
// One exception is for Traditional versus Simplified Chinese, albeit with
// a low confidence.
fmt.Println(language.SimplifiedChinese.ComprehensibleTo(language.TraditionalChinese))
fmt.Println("----")
// A Swiss German speaker will often understand High German.
fmt.Println(language.Make("de").ComprehensibleTo(language.Make("gsw")))
// The converse is not generally the case.
fmt.Println(language.Make("gsw").ComprehensibleTo(language.Make("de")))
// Output:
// Exact
// High
// No
// ----
// No
// Low
// ----
// High
// No
}
func ExampleParseAcceptLanguage() {
// Tags are reordered based on their q rating. A missing q value means 1.0.
fmt.Println(language.ParseAcceptLanguage(" nn;q=0.3, en-gb;q=0.8, en,"))
m := language.NewMatcher([]language.Tag{language.Norwegian, language.Make("en-AU")})
t, _, _ := language.ParseAcceptLanguage("da, en-gb;q=0.8, en;q=0.7")
fmt.Println(m.Match(t...))
// Danish is pretty close to Norwegian.
t, _, _ = language.ParseAcceptLanguage(" da, nl")
fmt.Println(m.Match(t...))
// Output:
// [en en-GB nn] [1 0.8 0.3] <nil>
// en-AU 1 High
// no 0 High
}
func (g *phraseGenerator) init(id string) {
ec := exemplarCharacters
loc := language.Make(id).String()
// get sets for locale or parent locale if the set is not defined.
for i := range g.sets {
for p, ok := loc, true; ok; p, ok = parent(p) {
if set, ok := ec[p]; ok && set[i] != "" {
g.sets[i].set = strings.Split(set[i], " ")
break
}
}
}
r := newRewriter()
r.addCases = *cases
for i := range g.sets {
g.sets[i].set = r.rewrite(g.sets[i].set)
}
// compute indexes
for i, set := range g.sets {
g.n += len(set.set)
g.sets[i].charIndex = g.n
}
}
func newGoCollator(loc string) (Collator, error) {
c := &goCollator{c: collate.New(language.Make(loc))}
return c, nil
}
// ExampleMatcher_bestMatch gives some examples of getting the best match of
// a set of tags to any of the tags of given set.
func ExampleMatcher() {
// This is the set of tags from which we want to pick the best match. These
// can be, for example, the supported languages for some package.
tags := []language.Tag{
language.English,
language.BritishEnglish,
language.French,
language.Afrikaans,
language.BrazilianPortuguese,
language.EuropeanPortuguese,
language.Croatian,
language.SimplifiedChinese,
language.Raw.Make("iw-IL"),
language.Raw.Make("iw"),
language.Raw.Make("he"),
}
m := language.NewMatcher(tags)
// A simple match.
fmt.Println(m.Match(language.Make("fr")))
// Australian English is closer to British than American English.
fmt.Println(m.Match(language.Make("en-AU")))
// Default to the first tag passed to the Matcher if there is no match.
fmt.Println(m.Match(language.Make("zu")))
// Get the default tag.
fmt.Println(m.Match())
fmt.Println("----")
// Croatian speakers will likely understand Serbian written in Latin script.
fmt.Println(m.Match(language.Make("sr-Latn")))
// We match SimplifiedChinese, but with Low confidence.
fmt.Println(m.Match(language.TraditionalChinese))
// Serbian in Latin script is a closer match to Croatian than Traditional
// Chinese to Simplified Chinese.
fmt.Println(m.Match(language.TraditionalChinese, language.Make("sr-Latn")))
fmt.Println("----")
// In case a multiple variants of a language are available, the most spoken
// variant is typically returned.
fmt.Println(m.Match(language.Portuguese))
// Pick the first value passed to Match in case of a tie.
fmt.Println(m.Match(language.Dutch, language.Make("en-AU"), language.Make("af-NA")))
fmt.Println(m.Match(language.Dutch, language.Make("af-NA"), language.Make("en-AU")))
fmt.Println("----")
// If a Matcher is initialized with a language and it's deprecated version,
// it will distinguish between them.
fmt.Println(m.Match(language.Raw.Make("iw")))
// However, for non-exact matches, it will treat deprecated versions as
// equivalent and consider other factors first.
fmt.Println(m.Match(language.Raw.Make("he-IL")))
// Output:
// fr 2 Exact
// en-GB 1 High
// en 0 No
// en 0 No
// ----
// hr 6 High
// zh-Hans 7 Low
// hr 6 High
// ----
// pt-BR 4 High
// en-GB 1 High
// af 3 High
// ----
// iw 9 Exact
// iw-IL 8 Exact
}