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languageName.go
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languageName.go
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package idioms
import (
"fmt"
"os"
"sort"
"strings"
)
//
// Language names exist in 3 forms : nice, standard, lowercase
// Ex : "C++", "Cpp", "cpp"
//
var mainStreamLangs = [...]string{"C", "Cpp", "Csharp", "Go", "Java", "JS", "Obj-C", "PHP", "Python", "Ruby", "Rust"}
// Return alpha codes for each language (no encoding problems).
// See PrintNiceLang to display them more fancy.
func MainStreamLanguages() []string {
return mainStreamLangs[:]
}
var moreLangs = [...]string{"Ada", "Caml", "Clojure", "Cobol", "D", "Dart", "Elixir", "Erlang", "Fortran", "Groovy", "Haskell", "Kotlin", "Lua", "Lisp", "Pascal", "Perl", "Prolog", "Scala", "Scheme", "Smalltalk", "VB"}
func MoreLanguages() []string {
// These do *not* include the MainStreamLanguages()
return moreLangs[:]
}
var synonymLangs = map[string]string{
"Javascript": "JS",
"Objective C": "Obj-C",
"Visual Basic": "VB",
}
var AllLangs []string
var AllNiceLangs []string
func AllLanguages() []string {
if AllLangs == nil {
// Warning: this lazy init is a data race. Consider sync.Once instead.
mainstream := MainStreamLanguages()
more := MoreLanguages()
AllLangs = make([]string, len(mainstream)+len(more))
copy(AllLangs, mainstream)
copy(AllLangs[len(mainstream):], more)
sort.Strings(AllLangs)
AllNiceLangs = make([]string, len(AllLangs))
for i, lg := range AllLangs {
AllNiceLangs[i] = PrintNiceLang(lg)
}
}
// Defensive copy (see issue #164)
return CloneStringSlice(AllLangs)
}
// autocompletions is a map[string][]string
var autocompletions = precomputeAutocompletions()
func LanguageAutoComplete(fragment string) []string {
fragment = strings.ToLower(fragment)
// Dynamic search (slow)
// options := []string{}
// for _, lg := range AllLanguages() {
// if strings.Contains(strings.ToLower(lg), fragment) || strings.Contains(strings.ToLower(PrintNiceLang(lg)), fragment) {
// options = append(options, PrintNiceLang(lg))
// }
// }
// return options
// Precomputed search (fast)
return autocompletions[fragment]
}
func PrintNiceLang(lang string) string {
switch strings.TrimSpace(strings.ToLower(lang)) {
case "cpp":
return "C++"
case "csharp", "cs":
return "C#"
default:
return lang
}
}
func PrintNiceLangs(langs []string) []string {
nice := make([]string, len(langs))
for i, lang := range langs {
nice[i] = PrintNiceLang(lang)
}
return nice
}
func indexByLowerCase(langs []string) map[string]string {
m := map[string]string{}
for _, lg := range langs {
m[strings.ToLower(lg)] = lg
}
return m
}
var langLowerCaseIndex = indexByLowerCase(AllLanguages())
func NormLang(lang string) string {
lg := strings.TrimSpace(strings.ToLower(lang))
switch lg {
case "c++", "cc":
return "Cpp"
case "c#", "cs":
return "Csharp"
case "javascript":
return "JS"
case "golang":
return "Go"
case "objective c":
return "Obj-C"
case "py":
return "Python"
case "rs":
return "Rust"
default:
return langLowerCaseIndex[lg]
}
}
func precomputeAutocompletions() map[string][]string {
m := make(map[string][]string, 100)
// Crazy shadowing of variable "lg" is allowed in go...
for _, trueLg := range AllLanguages() {
niceLg := PrintNiceLang(trueLg)
for _, lg := range []string{trueLg, niceLg} {
lg := strings.ToLower(lg)
fragments := substrings(lg)
for _, frag := range fragments {
if !StringSliceContains(m[frag], niceLg) {
m[frag] = append(m[frag], niceLg)
}
}
}
}
for lg, trueLg := range synonymLangs {
niceLg := PrintNiceLang(trueLg)
lg := strings.ToLower(lg)
fragments := substrings(lg)
for _, frag := range fragments {
if !StringSliceContains(m[frag], niceLg) {
m[frag] = append(m[frag], niceLg)
}
}
}
for lg, words := range langsExtraKeywords {
for _, word := range words {
fragments := substrings(word)
for _, frag := range fragments {
if !StringSliceContains(m[frag], lg) {
m[frag] = append(m[frag], lg)
}
}
}
}
fmt.Fprintf(os.Stderr, "---\n")
return m
}
func substrings(s string) []string {
L := len(s)
seen := make(map[string]bool, L*L)
fragments := make([]string, L*L)
// This works well for language names with only 1-byte chars, not for any string
for i := 0; i < L; i++ {
for j := i + 1; j <= L; j++ {
frag := s[i:j]
if seen[frag] {
continue
}
seen[frag] = true
fragments = append(fragments, frag)
}
}
return fragments
}
var langsExtraKeywords = map[string][]string{
"Clojure": []string{"clj", "cljs", "cljc", "edn"},
"Csharp": []string{"cs"},
"D": []string{"dlang"},
"Elixir": []string{"ex", "exs"},
"Erlang": []string{"erl", "hrl"},
"Fortran": []string{"for", "f90", "f95"},
"Go": []string{"golang"},
"Haskell": []string{"hs", "lhs"},
"JS": []string{"javascript"},
"Obj-C": []string{"Objective", "Objective-C", "mm"},
"Pascal": []string{"pp", "pas", "inc", "turbopascal"},
"Perl": []string{"pl"},
"Python": []string{"py"},
"Ruby": []string{"rb"},
"Rust": []string{"rs"},
"Scala": []string{"sc"},
"Scheme": []string{"scs", "ss"},
"VB": []string{"visual", "basic", "vba", "vb6"},
}
func LanguageExtraKeywords(lg string) []string {
// Careful, no defensive copy here!
return langsExtraKeywords[lg]
}