Now with neat combinator

Author: SaltyPeppermint

src/meta_lang/partial.rs

@@ -137,27 +137,25 @@ where
     let mut children_ids = Vec::new();
     let mut nodes = Vec::new();
     for token in value {
-        let node = if let Ok(node) = PartialLang::<L>::from_op(token, vec![]) {
-            // Sibling case
-            node
-        } else {
+        // Sibling case
+        let node = PartialLang::<L>::from_op(token, vec![]).or_else(|_| {
             // Parent case (has to take all the existing children_ids)
             loop {
                 if let Ok(node) = PartialLang::<L>::from_op(token, children_ids.clone()) {
                     children_ids.clear();
-                    break node;
+                    break Ok(node);
                 }
                 nodes.push(PartialLang::Placeholder);
                 children_ids.push(Id::from(nodes.len() - 1));
 
                 if children_ids.len() > L::MAX_ARITY {
-                    return Err(MetaLangError::MaxArity(
+                    break Err(MetaLangError::MaxArity(
                         token.to_owned(),
                         children_ids.len(),
                     ));
                 }
             }
-        };
+        })?;
         nodes.push(node);
         children_ids.push(Id::from(nodes.len() - 1));
     }