create new tag constructors for more flexibility

pkg/encoders/filter/filter.go

@@ -302,7 +302,7 @@ func (f *F) Unmarshal(b []byte) (r []byte, err error) {
 					return
 				}
 				ff = append([][]byte{k}, ff...)
-				s := append(*f.Tags, tag.New(ff...))
+				s := append(*f.Tags, tag.NewFromByteSlice(ff...))
 				f.Tags = &s
 				// f.Tags.F = append(f.Tags.F, tag.New(ff...))
 				// }
@@ -317,7 +317,7 @@ func (f *F) Unmarshal(b []byte) (r []byte, err error) {
 				); chk.E(err) {
 					return
 				}
-				f.Ids = tag.New(ff...)
+				f.Ids = tag.NewFromByteSlice(ff...)
 				state = betweenKV
 			case Kinds[0]:
 				if len(key) < len(Kinds) {
@@ -338,7 +338,7 @@ func (f *F) Unmarshal(b []byte) (r []byte, err error) {
 				); chk.E(err) {
 					return
 				}
-				f.Authors = tag.New(ff...)
+				f.Authors = tag.NewFromByteSlice(ff...)
 				state = betweenKV
 			case Until[0]:
 				if len(key) < len(Until) {

pkg/encoders/filter/filter_test.go

@@ -88,7 +88,7 @@ func GenFilter() (f *F, err error) {
 			idb = append(idb, id)
 		}
 		idb = append([][]byte{{'#', byte(b)}}, idb...)
-		*f.Tags = append(*f.Tags, tag.New(idb...))
+		*f.Tags = append(*f.Tags, tag.NewFromByteSlice(idb...))
 		// f.Tags.F = append(f.Tags.F, tag.FromBytesSlice(idb...))
 	}
 	tn := int(timestamp.Now().I64())

pkg/encoders/tag/tag.go

@@ -23,18 +23,26 @@ type T struct {
 	b bufpool.B
 }
 
-func New(t ...any) *T {
-	var bs [][]byte
+func New() *T { return &T{b: bufpool.Get()} }
+
+func NewFromByteSlice(t ...[]byte) (tt *T) {
+	tt = &T{T: t, b: bufpool.Get()}
+	return
+}
+
+func NewFromAny(t ...any) (tt *T) {
+	tt = &T{b: bufpool.Get()}
 	for _, v := range t {
-		if vb, ok := v.([]byte); ok {
-			bs = append(bs, vb)
-		} else if vs, ok := v.(string); ok {
-			bs = append(bs, []byte(vs))
-		} else {
-			panic("programmer error: type of tag element is not []byte or string")
+		switch vv := v.(type) {
+		case []byte:
+			tt.T = append(tt.T, vv)
+		case string:
+			tt.T = append(tt.T, []byte(vv))
+		default:
+			panic("invalid type for tag fields, must be []byte or string")
 		}
 	}
-	return &T{T: bs, b: bufpool.Get()}
+	return
 }
 
 func NewWithCap(c int) *T {