From b4e28f3d4d46db34dc363558a87752d50eae5777 Mon Sep 17 00:00:00 2001
From: Tom Alexander <tom@fizz.buzz>
Date: Sun, 18 Dec 2022 05:02:32 -0500
Subject: [PATCH] Implement a parser for a bullet in a list item.

---
 src/parser/plain_list.rs | 26 ++++++++++++++++++++++++++
 src/parser/token.rs      | 22 ++++++++++++++++++++++
 2 files changed, 48 insertions(+)

diff --git a/src/parser/plain_list.rs b/src/parser/plain_list.rs
index 86f2585..5fa0fb0 100644
--- a/src/parser/plain_list.rs
+++ b/src/parser/plain_list.rs
@@ -1,4 +1,12 @@
+use nom::branch::alt;
+use nom::bytes::complete::tag;
+use nom::character::complete::digit1;
+use nom::character::complete::one_of;
+use nom::combinator::recognize;
+use nom::sequence::tuple;
+
 use super::error::Res;
+use super::token::ListItem;
 use super::token::PlainList;
 use super::Context;
 
@@ -6,3 +14,21 @@ pub fn plain_list<'r, 's>(context: Context<'r, 's>, i: &'s str) -> Res<&'s str,
     // todo
     todo!()
 }
+
+fn item<'r, 's>(context: Context<'r, 's>, i: &'s str) -> Res<&'s str, ListItem<'s>> {
+    // todo
+    todo!()
+}
+
+fn counter<'s>(i: &'s str) -> Res<&'s str, &'s str> {
+    alt((recognize(one_of("abcdefghijklmnopqrstuvwxyz")), digit1))(i)
+}
+
+fn bullet<'s>(i: &'s str) -> Res<&'s str, &'s str> {
+    alt((
+        tag("*"),
+        tag("-"),
+        tag("+"),
+        recognize(tuple((counter, alt((tag("."), tag(")")))))),
+    ))(i)
+}
diff --git a/src/parser/token.rs b/src/parser/token.rs
index e695b23..9d4c7a8 100644
--- a/src/parser/token.rs
+++ b/src/parser/token.rs
@@ -106,3 +106,25 @@ impl<'a> Source<'a> for PlainList<'a> {
         self.source
     }
 }
+
+#[derive(Debug)]
+pub struct ListItem<'a> {
+    pub source: &'a str,
+}
+
+impl<'a> Source<'a> for ListItem<'a> {
+    fn get_source(&'a self) -> &'a str {
+        self.source
+    }
+}
+
+#[derive(Debug)]
+pub struct ListCounter<'a> {
+    pub source: &'a str,
+}
+
+impl<'a> Source<'a> for ListCounter<'a> {
+    fn get_source(&'a self) -> &'a str {
+        self.source
+    }
+}