add source with func name

field/encoder_text.go

@@ -1,6 +1,7 @@
 package field
 
 import (
+	"encoding"
 	"fmt"
 )
 
@@ -8,8 +9,18 @@ func NewEncoderText(opts ...func(*BaseEncoder)) BaseEncoder {
 	opts = append([]func(*BaseEncoder){
 		WithGropuConfig(0, 0, ' '),
 		WithNullValue("<nil>"),
-		WithDefaultValue(func(dst []byte, _ Encoder, val Value) []byte {
-			return fmt.Appendf(dst, "%+v", val.Any())
+		WithDefaultValue(func(dst []byte, enc Encoder, val Value) []byte {
+			switch value := val.Any().(type) {
+			case encoding.TextMarshaler:
+				data, err := value.MarshalText()
+				if err != nil {
+					return enc.AppendValue(dst, ErrorValue(err))
+				}
+
+				return enc.AppendValue(dst, StringValue(string(data)))
+			default:
+				return fmt.Appendf(dst, "%+v", val.Any())
+			}
 		}),
 	}, opts...)