dotenv Assign func validation check

dotenv/assign.go

@@ -1,7 +1,6 @@
 package dotenv
 
 import (
-	"errors"
 	"log/slog"
 	"reflect"
 	"strconv"
@@ -9,14 +8,18 @@ import (
 )
 
 // Assign env tag matching values from envMap
-func Assign[T any](c *T, envMap map[string]string) error {
-	if c == nil {
-		return errors.New("nil arg")
+func Assign[T any](to *T, envMap map[string]string) error {
+	if to == nil {
+		slog.Warn(" arg 'to' is nil")
+		return nil
 	}
 
-	slog.Info("env map", "v", envMap)
+	if len(envMap) == 0 {
+		slog.Warn(" envMap is nil")
+		return nil
+	}
 
-	val := reflect.Indirect(reflect.ValueOf(c))
+	val := reflect.Indirect(reflect.ValueOf(to))
 	name := val.Type().Name()
 	for i := range val.NumField() {
 		f := val.Type().Field(i)