package main import ( "fmt" "io" ) // generates Find() and some other stuff func (msg *MsgName) getLockname(s string) string { // leave this function stubbed in for development of autogenpb // if argv.Mutex { // // use the mutex lock from the modified protoc.pb.go file // return s + ".Lock" // // return s // causes Marshal() to panic? always use the variable name 'Lock'? // } // a single global lock by struct name return msg.Lockname } func generateFindBy(w io.Writer, FRUIT, APPLES, APPLE, COLOR, LOCK string) { fmt.Fprintln(w, "// lookup a", FRUIT, "by the ", COLOR) fmt.Fprintln(w, "func (x *"+FRUIT+") FindBy"+COLOR+"(s string) *"+APPLE+" {") fmt.Fprintln(w, " if x == nil {") fmt.Fprintln(w, " return nil") fmt.Fprintln(w, " }") fmt.Fprintln(w, "") fmt.Fprintln(w, " "+LOCK+".RLock()") fmt.Fprintln(w, " defer "+LOCK+".RUnlock()") fmt.Fprintln(w, "") fmt.Fprintln(w, " for i, _ := range x."+APPLES+" {") fmt.Fprintln(w, " if x."+APPLES+"[i]."+COLOR+" == s {") fmt.Fprintln(w, " return x."+APPLES+"[i]") fmt.Fprintln(w, " }") fmt.Fprintln(w, " }") fmt.Fprintln(w, " return nil") fmt.Fprintln(w, "}") fmt.Fprintln(w, "") } func (msg *MsgName) deleteBy(w io.Writer, FRUIT, APPLES, APPLE, COLOR string) { LOCK := msg.getLockname("x") fmt.Fprintln(w, "func (x *"+FRUIT+") DeleteBy"+COLOR+"(s string) bool {") fmt.Fprintln(w, " "+LOCK+".Lock()") fmt.Fprintln(w, " defer "+LOCK+".Unlock()") fmt.Fprintln(w, "") fmt.Fprintln(w, " for i, _ := range x."+APPLES+" {") fmt.Fprintln(w, " if x."+APPLES+"[i]."+COLOR+" == s {") fmt.Fprintln(w, " x."+APPLES+"[i] = x."+APPLES+"[len(x."+APPLES+")-1]") fmt.Fprintln(w, " x."+APPLES+" = x."+APPLES+"[:len(x."+APPLES+")-1]") fmt.Fprintln(w, " return true") fmt.Fprintln(w, " }") fmt.Fprintln(w, " }") fmt.Fprintln(w, " return false") fmt.Fprintln(w, "}") fmt.Fprintln(w, "") } // this tries to return the deleted one but is wrong/gives warning if mutex lock is in struct func (msg *MsgName) deleteByWithCopy(w io.Writer, FRUIT, APPLES, APPLE, COLOR string) { LOCK := msg.getLockname("x") fmt.Fprintln(w, "// TESTING fails with 'go vet' warning") fmt.Fprintln(w, "func (x *"+FRUIT+") DeleteBy"+COLOR+"(s string) *"+APPLE+" {") fmt.Fprintln(w, " "+LOCK+".Lock()") fmt.Fprintln(w, " defer "+LOCK+".Unlock()") fmt.Fprintln(w, "") fmt.Fprintln(w, " var newr "+APPLE) fmt.Fprintln(w, "") fmt.Fprintln(w, " for i, _ := range x."+APPLES+" {") fmt.Fprintln(w, " if x."+APPLES+"[i]."+COLOR+" == s {") fmt.Fprintln(w, " newr = *x."+APPLES+"[i]") fmt.Fprintln(w, " x."+APPLES+"[i] = x."+APPLES+"[len(x."+APPLES+")-1]") fmt.Fprintln(w, " x."+APPLES+" = x."+APPLES+"[:len(x."+APPLES+")-1]") fmt.Fprintln(w, " return &newr") fmt.Fprintln(w, " }") fmt.Fprintln(w, " }") fmt.Fprintln(w, " return nil") fmt.Fprintln(w, "}") fmt.Fprintln(w, "") } // new 2025 idea. useful? TODO: look at this again in 1y func (msg *MsgName) insertBy(w io.Writer, FRUIT, APPLES, APPLE string, COLOR string) { LOCK := msg.getLockname("x") fmt.Fprintln(w, "// returns an "+APPLE+" if "+COLOR+" matches, otherwise create") fmt.Fprintln(w, "func (x *"+FRUIT+") InsertBy"+COLOR+" (y string) *"+APPLE+" {") fmt.Fprintln(w, " "+LOCK+".Lock()") fmt.Fprintln(w, " defer "+LOCK+".Unlock()") fmt.Fprintln(w, "") fmt.Fprintln(w, " for _, p := range x."+APPLES+" {") fmt.Fprintln(w, " if p."+COLOR+" == y {") fmt.Fprintln(w, " return p") fmt.Fprintln(w, " }") fmt.Fprintln(w, " }") fmt.Fprintln(w, "") fmt.Fprintln(w, " z := new("+APPLE+")") fmt.Fprintln(w, " z."+COLOR+" = y") fmt.Fprintln(w, " x."+APPLES+" = append(x."+APPLES+", z)") fmt.Fprintln(w, " return z") fmt.Fprintln(w, "}") fmt.Fprintln(w, "") }