Wrote a plain list item parser.

org_mode_samples/plain_lists/empty_list_item.org

@@ -0,0 +1,3 @@
+1.
+2.
+3.

src/parser/plain_list.rs

@@ -1,20 +1,26 @@
 use nom::branch::alt;
+use nom::bytes::complete::tag;
+use nom::character::complete::digit1;
+use nom::character::complete::one_of;
 use nom::character::complete::space0;
 use nom::combinator::eof;
 use nom::combinator::not;
 use nom::combinator::recognize;
 use nom::combinator::verify;
+use nom::multi::many0;
 use nom::sequence::tuple;
 
+use crate::parser::element::element;
 use crate::parser::parser_context::ChainBehavior;
 use crate::parser::parser_context::ContextElement;
 use crate::parser::parser_context::ExitMatcherNode;
+use crate::parser::util::get_consumed;
 use crate::parser::util::start_of_line;
 
 use super::error::CustomError;
 use super::error::MyError;
 use super::error::Res;
-use super::lesser_element::Paragraph;
+use super::greater_element::PlainListItem;
 use super::parser_with_context::parser_with_context;
 use super::util::non_whitespace_character;
 use super::Context;
@@ -23,18 +29,44 @@ use super::Context;
 pub fn plain_list_item<'r, 's>(
     context: Context<'r, 's>,
     input: &'s str,
-) -> Res<&'s str, Paragraph<'s>> {
+) -> Res<&'s str, PlainListItem<'s>> {
     not(|i| context.check_exit_matcher(i))(input)?;
     start_of_line(context, input)?;
     let (remaining, leading_whitespace) = space0(input)?;
     // It is fine that we get the indent level using the number of bytes rather than the number of characters because nom's space0 only matches space and tab (0x20 and 0x09)
     let indent_level = leading_whitespace.len();
-    let list_item_context = context
+    let parser_context = context
         .with_additional_node(ContextElement::ExitMatcherNode(ExitMatcherNode {
             exit_matcher: ChainBehavior::AndParent(Some(&plain_list_item_end)),
         }))
         .with_additional_node(ContextElement::ListItem(indent_level));
-    todo!()
+
+    let element_matcher = parser_with_context!(element)(&parser_context);
+    let (remaining, (bull, _ws)) = tuple((bullet, space0))(remaining)?;
+    let (remaining, contents) = many0(element_matcher)(remaining)?;
+    let source = get_consumed(input, remaining);
+
+    Ok((
+        remaining,
+        PlainListItem {
+            source,
+            bullet: bull,
+            contents,
+        },
+    ))
+}
+
+fn bullet<'s>(i: &'s str) -> Res<&'s str, &'s str> {
+    alt((
+        tag("*"),
+        tag("-"),
+        tag("+"),
+        recognize(tuple((counter, alt((tag("."), tag(")")))))),
+    ))(i)
+}
+
+fn counter<'s>(i: &'s str) -> Res<&'s str, &'s str> {
+    alt((recognize(one_of("abcdefghijklmnopqrstuvwxyz")), digit1))(i)
 }
 
 fn plain_list_item_end<'r, 's>(context: Context<'r, 's>, input: &'s str) -> Res<&'s str, &'s str> {