Implement the statistics cookie parser.

src/parser/statistics_cookie.rs

@@ -1,6 +1,12 @@
+use nom::branch::alt;
+use nom::bytes::complete::tag;
+use nom::character::complete::space0;
+use nom::combinator::recognize;
+use nom::sequence::tuple;
+
 use super::Context;
 use crate::error::Res;
-use crate::parser::util::not_yet_implemented;
+use crate::parser::parser_with_context::parser_with_context;
 use crate::parser::StatisticsCookie;
 
 #[tracing::instrument(ret, level = "debug")]
@@ -8,6 +14,35 @@ pub fn statistics_cookie<'r, 's>(
     context: Context<'r, 's>,
     input: &'s str,
 ) -> Res<&'s str, StatisticsCookie<'s>> {
-    not_yet_implemented()?;
-    todo!()
+    alt((
+        parser_with_context!(percent_statistics_cookie)(context),
+        parser_with_context!(fraction_statistics_cookie)(context),
+    ))(input)
+}
+
+#[tracing::instrument(ret, level = "debug")]
+pub fn percent_statistics_cookie<'r, 's>(
+    context: Context<'r, 's>,
+    input: &'s str,
+) -> Res<&'s str, StatisticsCookie<'s>> {
+    let (remaining, source) =
+        recognize(tuple((tag("["), nom::character::complete::u64, tag("%]"))))(input)?;
+    let (remaining, _) = space0(remaining)?;
+    Ok((remaining, StatisticsCookie { source }))
+}
+
+#[tracing::instrument(ret, level = "debug")]
+pub fn fraction_statistics_cookie<'r, 's>(
+    context: Context<'r, 's>,
+    input: &'s str,
+) -> Res<&'s str, StatisticsCookie<'s>> {
+    let (remaining, source) = recognize(tuple((
+        tag("["),
+        nom::character::complete::u64,
+        tag("/"),
+        nom::character::complete::u64,
+        tag("]"),
+    )))(input)?;
+    let (remaining, _) = space0(remaining)?;
+    Ok((remaining, StatisticsCookie { source }))
 }