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package main
import (
"fmt"
"io"
)
// generates Find() and some other stuff
func (msg *MsgName) generateFindBy(w io.Writer, FUNCNAME, STRUCT string, sortvals *Sort, childVar *MsgVar) string {
LOCK := msg.getLockname("x")
if childVar.VarType != "string" {
return ""
}
VARNAME := sortvals.VarName
VARTYPE := sortvals.VarType
COLOR := childVar.VarName
funcdef := "func (x *" + STRUCT + ") " + FUNCNAME + "(s string) *" + VARTYPE
fmt.Fprintln(w, "// lookup a", STRUCT, "by the ", COLOR)
fmt.Fprintln(w, funcdef, "{")
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."+VARNAME+" {")
fmt.Fprintln(w, " if x."+VARNAME+"[i]."+COLOR+" == s {")
fmt.Fprintln(w, " return x."+VARNAME+"[i]")
fmt.Fprintln(w, " }")
fmt.Fprintln(w, " }")
fmt.Fprintln(w, " return nil")
fmt.Fprintln(w, "}")
fmt.Fprintln(w, "")
return funcdef
}
func (msg *MsgName) deleteBy(w io.Writer, FRUIT, APPLES, APPLE, COLOR, FUNCNAME, VARNAME string) string {
LOCK := msg.getLockname("x")
funcdef := "func (x *" + FRUIT + ") " + FUNCNAME + "(s string) bool"
fmt.Fprintln(w, funcdef, "{")
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]."+VARNAME+" == 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, "")
return funcdef
}
// 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, FUNCNAME, VARNAME string) string {
LOCK := msg.getLockname("x")
funcdef := "func (x *" + FRUIT + ") " + FUNCNAME + "(s string) *" + APPLE
fmt.Fprintln(w, "// TESTING fails with 'go vet' warning")
fmt.Fprintln(w, funcdef, "{")
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]."+VARNAME+" == 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, "")
return funcdef
}
// 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, "")
}
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