func()

in internal/language/gen.go [582:673]

• 80 lines of code
• 36 McCabe index (conditional complexity)

func (b *builder) parseIndices() {
	meta := b.supp.Metadata

	for k, v := range b.registry {
		var ss *stringSet
		switch v.typ {
		case "language":
			if len(k) == 2 || v.suppressScript != "" || v.scope == "special" {
				b.lang.add(k)
				continue
			} else {
				ss = &b.langNoIndex
			}
		case "region":
			ss = &b.region
		case "script":
			ss = &b.script
		case "variant":
			ss = &b.variant
		default:
			continue
		}
		ss.add(k)
	}
	// Include any language for which there is data.
	for _, lang := range b.data.Locales() {
		if x := b.data.RawLDML(lang); false ||
			x.LocaleDisplayNames != nil ||
			x.Characters != nil ||
			x.Delimiters != nil ||
			x.Measurement != nil ||
			x.Dates != nil ||
			x.Numbers != nil ||
			x.Units != nil ||
			x.ListPatterns != nil ||
			x.Collations != nil ||
			x.Segmentations != nil ||
			x.Rbnf != nil ||
			x.Annotations != nil ||
			x.Metadata != nil {

			from := strings.Split(lang, "_")
			if lang := from[0]; lang != "root" {
				b.lang.add(lang)
			}
		}
	}
	// Include locales for plural rules, which uses a different structure.
	for _, plurals := range b.data.Supplemental().Plurals {
		for _, rules := range plurals.PluralRules {
			for _, lang := range strings.Split(rules.Locales, " ") {
				if lang = strings.Split(lang, "_")[0]; lang != "root" {
					b.lang.add(lang)
				}
			}
		}
	}
	// Include languages in likely subtags.
	for _, m := range b.supp.LikelySubtags.LikelySubtag {
		from := strings.Split(m.From, "_")
		b.lang.add(from[0])
	}
	// Include ISO-639 alpha-3 bibliographic entries.
	for _, a := range meta.Alias.LanguageAlias {
		if a.Reason == "bibliographic" {
			b.langNoIndex.add(a.Type)
		}
	}
	// Include regions in territoryAlias (not all are in the IANA registry!)
	for _, reg := range b.supp.Metadata.Alias.TerritoryAlias {
		if len(reg.Type) == 2 {
			b.region.add(reg.Type)
		}
	}

	for _, s := range b.lang.s {
		if len(s) == 3 {
			b.langNoIndex.remove(s)
		}
	}
	b.writeConst("NumLanguages", len(b.lang.slice())+len(b.langNoIndex.slice()))
	b.writeConst("NumScripts", len(b.script.slice()))
	b.writeConst("NumRegions", len(b.region.slice()))

	// Add dummy codes at the start of each list to represent "unspecified".
	b.lang.add("---")
	b.script.add("----")
	b.region.add("---")

	// common locales
	b.locale.parse(meta.DefaultContent.Locales)
}