Abhilash S.L | 3b49463 | 2019-07-16 15:51:09 +0530 | [diff] [blame] | 1 | // Copyright 2015 The Go Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | // +build ignore |
| 6 | |
| 7 | package main |
| 8 | |
| 9 | // This file generates derivative tables based on the language package itself. |
| 10 | |
| 11 | import ( |
| 12 | "fmt" |
| 13 | "log" |
| 14 | "sort" |
| 15 | "strings" |
| 16 | |
| 17 | "golang.org/x/text/internal/language" |
| 18 | ) |
| 19 | |
| 20 | // Compact indices: |
| 21 | // Note -va-X variants only apply to localization variants. |
| 22 | // BCP variants only ever apply to language. |
| 23 | // The only ambiguity between tags is with regions. |
| 24 | |
| 25 | func (b *builder) writeCompactIndex() { |
| 26 | // Collect all language tags for which we have any data in CLDR. |
| 27 | m := map[language.Tag]bool{} |
| 28 | for _, lang := range b.data.Locales() { |
| 29 | // We include all locales unconditionally to be consistent with en_US. |
| 30 | // We want en_US, even though it has no data associated with it. |
| 31 | |
| 32 | // TODO: put any of the languages for which no data exists at the end |
| 33 | // of the index. This allows all components based on ICU to use that |
| 34 | // as the cutoff point. |
| 35 | // if x := data.RawLDML(lang); false || |
| 36 | // x.LocaleDisplayNames != nil || |
| 37 | // x.Characters != nil || |
| 38 | // x.Delimiters != nil || |
| 39 | // x.Measurement != nil || |
| 40 | // x.Dates != nil || |
| 41 | // x.Numbers != nil || |
| 42 | // x.Units != nil || |
| 43 | // x.ListPatterns != nil || |
| 44 | // x.Collations != nil || |
| 45 | // x.Segmentations != nil || |
| 46 | // x.Rbnf != nil || |
| 47 | // x.Annotations != nil || |
| 48 | // x.Metadata != nil { |
| 49 | |
| 50 | // TODO: support POSIX natively, albeit non-standard. |
| 51 | tag := language.Make(strings.Replace(lang, "_POSIX", "-u-va-posix", 1)) |
| 52 | m[tag] = true |
| 53 | // } |
| 54 | } |
| 55 | |
| 56 | // TODO: plural rules are also defined for the deprecated tags: |
| 57 | // iw mo sh tl |
| 58 | // Consider removing these as compact tags. |
| 59 | |
| 60 | // Include locales for plural rules, which uses a different structure. |
| 61 | for _, plurals := range b.supp.Plurals { |
| 62 | for _, rules := range plurals.PluralRules { |
| 63 | for _, lang := range strings.Split(rules.Locales, " ") { |
| 64 | m[language.Make(lang)] = true |
| 65 | } |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | var coreTags []language.CompactCoreInfo |
| 70 | var special []string |
| 71 | |
| 72 | for t := range m { |
| 73 | if x := t.Extensions(); len(x) != 0 && fmt.Sprint(x) != "[u-va-posix]" { |
| 74 | log.Fatalf("Unexpected extension %v in %v", x, t) |
| 75 | } |
| 76 | if len(t.Variants()) == 0 && len(t.Extensions()) == 0 { |
| 77 | cci, ok := language.GetCompactCore(t) |
| 78 | if !ok { |
| 79 | log.Fatalf("Locale for non-basic language %q", t) |
| 80 | } |
| 81 | coreTags = append(coreTags, cci) |
| 82 | } else { |
| 83 | special = append(special, t.String()) |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | w := b.w |
| 88 | |
| 89 | sort.Slice(coreTags, func(i, j int) bool { return coreTags[i] < coreTags[j] }) |
| 90 | sort.Strings(special) |
| 91 | |
| 92 | w.WriteComment(` |
| 93 | NumCompactTags is the number of common tags. The maximum tag is |
| 94 | NumCompactTags-1.`) |
| 95 | w.WriteConst("NumCompactTags", len(m)) |
| 96 | |
| 97 | fmt.Fprintln(w, "const (") |
| 98 | for i, t := range coreTags { |
| 99 | fmt.Fprintf(w, "%s ID = %d\n", ident(t.Tag().String()), i) |
| 100 | } |
| 101 | for i, t := range special { |
| 102 | fmt.Fprintf(w, "%s ID = %d\n", ident(t), i+len(coreTags)) |
| 103 | } |
| 104 | fmt.Fprintln(w, ")") |
| 105 | |
| 106 | w.WriteVar("coreTags", coreTags) |
| 107 | |
| 108 | w.WriteConst("specialTagsStr", strings.Join(special, " ")) |
| 109 | } |
| 110 | |
| 111 | func ident(s string) string { |
| 112 | return strings.Replace(s, "-", "", -1) + "Index" |
| 113 | } |