Get rid of checks when creating constructs. Check should handle this.

extensionElement.go

@@ -2,7 +2,7 @@ package atom
 
 import (
 	"encoding/xml"
-	"errors"
+	"fmt"
 )
 
 type ExtensionElement struct {
@@ -11,27 +11,20 @@ type ExtensionElement struct {
 }
 
 // NewExtensionElement creates a new ExtensionElement. It returns a
-// *ExtensionElement and an error.
-func NewExtensionElement(name string, value any) (*ExtensionElement, error) {
-	if name == "" {
-		return nil, errors.New("error adding extension attribute: name string empty")
-	}
-	if value == "" {
-		return nil, errors.New("error adding extension attribute: value string empty")
-	}
-
-	return &ExtensionElement{XMLName: xml.Name{Local: name}, Value: value}, nil
+// *ExtensionElement.
+func NewExtensionElement(name string, value any) *ExtensionElement {
+	return &ExtensionElement{XMLName: xml.Name{Local: name}, Value: value}
 }
 
 // Check checks the ExtensionElement for incompatibilities with RFC4287. It
 // returns an error.
 func (e *ExtensionElement) Check() error {
 	if e.XMLName.Local == "" {
-		return errors.New("xml name of extension empty")
+		return fmt.Errorf("xml name of extension %v empty", e)
 	}
 
 	if e.Value == nil {
-		return errors.New("value element of extension empty")
+		return fmt.Errorf("value of extension %v empty", e)
 	}
 
 	return nil