fix(elements): TableCell can now have no children

src/error.rs

@@ -26,6 +26,20 @@ pub enum OrgizeError {
     },
 }
 
+impl OrgizeError {
+    pub fn element<'a, 'b>(&self, org: &'a Org<'b>) -> &'a Element<'b> {
+        match &self {
+            OrgizeError::Children { at }
+            | OrgizeError::NoChildren { at }
+            | OrgizeError::HeadlineOrSection { at }
+            | OrgizeError::Title { at }
+            | OrgizeError::Headline { at }
+            | OrgizeError::Detached { at }
+            | OrgizeError::HeadlineLevel { at, .. } => org.arena[*at].get(),
+        }
+    }
+}
+
 impl Org<'_> {
     /// Validate an `Org` struct.
     pub fn validate(&self) -> Result<(), OrgizeError> {
@@ -107,7 +121,6 @@ impl Org<'_> {
                 | Element::Section
                 | Element::Table(Table::Org { .. })
                 | Element::TableRow(TableRow::Standard)
-                | Element::TableCell
                 | Element::Bold
                 | Element::Italic
                 | Element::Underline
@@ -119,6 +132,9 @@ impl Org<'_> {
                         return Err(OrgizeError::Children { at: node_id });
                     }
                 }
+                // TableCell is a container but it might
+                // not contains anything, e.g. `||||||`
+                Element::TableCell => ()
             }
         }
         Ok(())

src/parsers.rs

@@ -1,6 +1,7 @@
 // parser related functions
 
 use std::borrow::Cow;
+use std::iter::once;
 use std::marker::PhantomData;
 
 use indextree::{Arena, NodeId};
@@ -168,7 +169,7 @@ pub fn parse_section_and_headlines<'a, T: ElementArena<'a>>(
     }
 
     let mut last_end = 0;
-    for i in memchr_iter(b'\n', content.as_bytes()) {
+    for i in memchr_iter(b'\n', content.as_bytes()).chain(once(content.len())) {
         if let Ok((mut tail, (headline_content, level))) = parse_headline(&content[last_end..]) {
             if last_end != 0 {
                 let node = arena.push_element(Element::Section, parent);
@@ -668,7 +669,7 @@ pub fn parse_table<'a, T: ElementArena<'a>>(
         let table_node = arena.push_element(Table::Org { tblfm: None }, parent);
 
         let mut last_end = 0;
-        for start in memchr_iter(b'\n', contents.as_bytes()) {
+        for start in memchr_iter(b'\n', contents.as_bytes()).chain(once(contents.len())) {
             let line = contents[last_end..start].trim();
             match TableRow::parse(line) {
                 Some(TableRow::Standard) => {
@@ -727,10 +728,8 @@ pub fn take_lines_while(predicate: impl Fn(&str) -> bool) -> impl Fn(&str) -> IR
                 if !predicate(&input[last_end..i - 1]) {
                     return Ok((&input[last_end..], &input[0..last_end]));
                 }
-            } else {
-                if !predicate(&input[last_end..i]) {
-                    return Ok((&input[last_end..], &input[0..last_end]));
-                }
+            } else if !predicate(&input[last_end..i]) {
+                return Ok((&input[last_end..], &input[0..last_end]));
             }
             last_end = i + 1;
         }