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

category.go

@@ -2,9 +2,7 @@ package atom
 
 import (
 	"encoding/xml"
-	"errors"
 	"fmt"
-	"html"
 )
 
 type Category struct {
@@ -15,43 +13,14 @@ type Category struct {
 	Label  string `xml:"label,attr,omitempty"`
 }
 
-// NewCategory creates a new Category. It returns a *Category and an error.
-func NewCategory(term string) (*Category, error) {
-	if term == "" {
-		return nil, errors.New("error creating new category: term string empty")
-	}
-
-	return &Category{Term: term}, nil
+// NewCategory creates a new Category. It returns a *Category.
+func NewCategory(term string) *Category {
+	return &Category{Term: term}
 }
 
-// SetTerm sets the Term attribute of the Category. It returns an error.
-func (c *Category) SetTerm(t string) error {
-	if t == "" {
-		return errors.New("error setting term of category: t string empty")
-	}
-
-	c.Term = t
-	return nil
-}
-
-// SetScheme sets the Scheme attribute of the Category. It returns an error.
-func (c *Category) SetScheme(s string) error {
-	if !isValidIRI(s) {
-		return fmt.Errorf("scheme %v not correctly formatted", s)
-	}
-
-	c.Scheme = s
-	return nil
-}
-
-// SetLabel sets the Label attribute of the Category. It returns an error.
-func (c *Category) SetLabel(label string) error {
-	if label == "" {
-		return errors.New("error setting label of category: label string empty")
-	}
-
-	c.Label = html.UnescapeString(label)
-	return nil
+// SetLabel sets the Label attribute of the Category.
+func (c *Category) SetLabel(label string) {
+	c.Label = Unescape(label)
 }
 
 // Check checks the Category for incompatibilities with RFC4287. It returns an