Use check_no_children!() where it makes sense.

src/jingle_message.rs

@@ -33,9 +33,7 @@ fn get_sid(elem: Element) -> Result<SessionId, Error> {
 }
 
 fn check_empty_and_get_sid(elem: Element) -> Result<SessionId, Error> {
-    for _ in elem.children() {
+    check_no_children!(elem, "Jingle message");
-        return Err(Error::ParseError("Unknown child in Jingle message element."));
-    }
     get_sid(elem)
 }
 

src/message.rs

@@ -199,18 +199,14 @@ impl TryFrom<Element> for Message {
         let mut payloads = vec!();
         for elem in root.children() {
             if elem.is("body", ns::DEFAULT_NS) {
-                for _ in elem.children() {
+                check_no_children!(elem, "body");
-                    return Err(Error::ParseError("Unknown child in body element."));
-                }
                 let lang = get_attr!(elem, "xml:lang", default);
                 let body = Body(elem.text());
                 if bodies.insert(lang, body).is_some() {
                     return Err(Error::ParseError("Body element present twice for the same xml:lang."));
                 }
             } else if elem.is("subject", ns::DEFAULT_NS) {
-                for _ in elem.children() {
+                check_no_children!(elem, "subject");
-                    return Err(Error::ParseError("Unknown child in subject element."));
-                }
                 let lang = get_attr!(elem, "xml:lang", default);
                 let subject = Subject(elem.text());
                 if subjects.insert(lang, subject).is_some() {
@@ -220,9 +216,7 @@ impl TryFrom<Element> for Message {
                 if thread.is_some() {
                     return Err(Error::ParseError("Thread element present twice."));
                 }
-                for _ in elem.children() {
+                check_no_children!(elem, "thread");
-                    return Err(Error::ParseError("Unknown child in thread element."));
-                }
                 thread = Some(Thread(elem.text()));
             } else {
                 payloads.push(elem.clone())

src/muc/user.rs

@@ -94,9 +94,7 @@ impl TryFrom<Element> for Actor {
     fn try_from(elem: Element) -> Result<Actor, Error> {
         check_self!(elem, "actor", MUC_USER);
         check_no_unknown_attributes!(elem, "actor", ["jid", "nick"]);
-        for _ in elem.children() {
+        check_no_children!(elem, "actor");
-            return Err(Error::ParseError("Unknown child in actor element."));
-        }
         let jid: Option<Jid> = get_attr!(elem, "jid", optional);
         let nick = get_attr!(elem, "nick", optional);
 

src/presence.rs

@@ -267,15 +267,11 @@ impl TryFrom<Element> for Presence {
                     return Err(Error::ParseError("More than one show element in a presence."));
                 }
                 check_no_attributes!(elem, "show");
-                for _ in elem.children() {
+                check_no_children!(elem, "show");
-                    return Err(Error::ParseError("Unknown child in show element."));
-                }
                 show = Some(Show::from_str(elem.text().as_ref())?);
             } else if elem.is("status", ns::DEFAULT_NS) {
                 check_no_unknown_attributes!(elem, "status", ["xml:lang"]);
-                for _ in elem.children() {
+                check_no_children!(elem, "status");
-                    return Err(Error::ParseError("Unknown child in status element."));
-                }
                 let lang = get_attr!(elem, "xml:lang", default);
                 if presence.statuses.insert(lang, elem.text()).is_some() {
                     return Err(Error::ParseError("Status element present twice for the same xml:lang."));
@@ -284,10 +280,8 @@ impl TryFrom<Element> for Presence {
                 if priority.is_some() {
                     return Err(Error::ParseError("More than one priority element in a presence."));
                 }
-                check_no_attributes!(elem, "status");
+                check_no_attributes!(elem, "priority");
-                for _ in elem.children() {
+                check_no_children!(elem, "priority");
-                    return Err(Error::ParseError("Unknown child in priority element."));
-                }
                 priority = Some(Priority::from_str(elem.text().as_ref())?);
             } else {
                 presence.payloads.push(elem.clone());

src/pubsub/event.rs

@@ -175,14 +175,10 @@ impl TryFrom<Element> for PubSubEvent {
             } else if child.is("items", ns::PUBSUB_EVENT) {
                 payload = Some(parse_items(child.clone(), node)?);
             } else if child.is("purge", ns::PUBSUB_EVENT) {
-                for _ in child.children() {
+                check_no_children!(child, "purge");
-                    return Err(Error::ParseError("Unknown child in purge element."));
-                }
                 payload = Some(PubSubEvent::Purge { node });
             } else if child.is("subscription", ns::PUBSUB_EVENT) {
-                for _ in child.children() {
+                check_no_children!(child, "subscription");
-                    return Err(Error::ParseError("Unknown child in purge element."));
-                }
                 payload = Some(PubSubEvent::Subscription {
                     node: node,
                     expiry: get_attr!(child, "expiry", optional),

src/stanza_error.rs

@@ -71,9 +71,7 @@ impl TryFrom<Element> for StanzaError {
 
         for child in elem.children() {
             if child.is("text", ns::XMPP_STANZAS) {
-                for _ in child.children() {
+                check_no_children!(child, "text");
-                    return Err(Error::ParseError("Unknown element in error text."));
-                }
                 let lang = get_attr!(elem, "xml:lang", default);
                 if texts.insert(lang, child.text()).is_some() {
                     return Err(Error::ParseError("Text element present twice for the same xml:lang."));
@@ -82,9 +80,7 @@ impl TryFrom<Element> for StanzaError {
                 if defined_condition.is_some() {
                     return Err(Error::ParseError("Error must not have more than one defined-condition."));
                 }
-                for _ in child.children() {
+                check_no_children!(child, "defined-condition");
-                    return Err(Error::ParseError("Unknown element in defined-condition."));
-                }
                 let condition = DefinedCondition::try_from(child.clone())?;
                 defined_condition = Some(condition);
             } else {