To support copy []any to []T

copier.go

@@ -227,7 +227,7 @@ func copier(toValue interface{}, fromValue interface{}, opt Option) (err error)
 			slice := reflect.MakeSlice(reflect.SliceOf(to.Type().Elem()), from.Len(), from.Cap())
 			to.Set(slice)
 		}
-		if fromType.ConvertibleTo(toType) {
+		if opt.DeepCopy || fromType.ConvertibleTo(toType) {
 			for i := 0; i < from.Len(); i++ {
 				if to.Len() < i+1 {
 					to.Set(reflect.Append(to, reflect.New(to.Type().Elem()).Elem()))

copier_different_type_test.go

@@ -2,6 +2,7 @@ package copier_test
 
 import (
 	"database/sql"
+	"reflect"
 	"testing"
 	"time"
 
@@ -220,3 +221,46 @@ func TestCopyFromBaseToSqlNullWithOptionDeepCopy(t *testing.T) {
 		t.Errorf("b.H = %v, want %v", b.H, "deep")
 	}
 }
+
+func TestCopyWithAnySlice(t *testing.T) {
+	t.Run("AnySliceWithDeepCopy", func(t *testing.T) {
+		from := []interface{}{
+			map[string]interface{}{
+				"K1": "V1",
+				"K2": "V2",
+			},
+		}
+		var to []map[string]string
+		err := copier.CopyWithOption(&to, from, copier.Option{DeepCopy: true})
+		if err != nil {
+			t.Errorf("CopyStructWithOption() error = %v", err)
+			return
+		}
+		want := []map[string]string{{"K1": "V1", "K2": "V2"}}
+		ok := reflect.DeepEqual(to, want)
+		if !ok {
+			t.Errorf("toVal = %v, want %v", to, want)
+		}
+	})
+	t.Run("AnySliceWithoutDeepCopy", func(t *testing.T) {
+		from := []interface{}{
+			map[string]interface{}{
+				"K1": "V1",
+				"K2": "V2",
+			},
+		}
+		var to []map[string]string
+		err := copier.CopyWithOption(&to, from, copier.Option{DeepCopy: false})
+		if err != nil {
+			t.Errorf("CopyStructWithOption() error = %v", err)
+			return
+		}
+		want := []map[string]string{
+			nil,
+		}
+		ok := reflect.DeepEqual(to, want)
+		if !ok {
+			t.Errorf("toVal = %v, want %v", to, want)
+		}
+	})
+}