Add additional tracing to lesser block.

src/parser/lesser_block.rs

@@ -238,31 +238,49 @@ fn lesser_block_end(
 ) -> impl for<'r, 's> Fn(Context<'r, 's>, &'s str) -> Res<&'s str, &'s str> {
     let current_name_lower = current_name.to_lowercase();
     move |context: Context, input: &str| {
-        start_of_line(context, input)?;
+        _lesser_block_end(context, input, current_name_lower.as_str())
-        let (remaining, _leading_whitespace) = space0(input)?;
-        let (remaining, (_begin, _name, _ws)) = tuple((
-            tag_no_case("#+end_"),
-            tag_no_case(current_name_lower.as_str()),
-            alt((eof, line_ending)),
-        ))(remaining)?;
-        let source = get_consumed(input, remaining);
-        Ok((remaining, source))
     }
 }
 
+#[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
+fn _lesser_block_end<'r, 's, 'x>(
+    context: Context<'r, 's>,
+    input: &'s str,
+    current_name_lower: &'x str,
+) -> Res<&'s str, &'s str> {
+    start_of_line(context, input)?;
+    let (remaining, _leading_whitespace) = space0(input)?;
+    let (remaining, (_begin, _name, _ws)) = tuple((
+        tag_no_case("#+end_"),
+        tag_no_case(current_name_lower),
+        alt((eof, line_ending)),
+    ))(remaining)?;
+    let source = get_consumed(input, remaining);
+    Ok((remaining, source))
+}
+
 fn lesser_block_begin(
     current_name: &str,
 ) -> impl for<'r, 's> Fn(Context<'r, 's>, &'s str) -> Res<&'s str, &'s str> {
     let current_name_lower = current_name.to_lowercase();
     move |context: Context, input: &str| {
-        start_of_line(context, input)?;
+        _lesser_block_begin(context, input, current_name_lower.as_str())
-        let (remaining, _leading_whitespace) = space0(input)?;
-        let (remaining, (_begin, name)) = tuple((
-            tag_no_case("#+begin_"),
-            verify(name, |name: &str| {
-                name.to_lowercase().as_str() == current_name_lower
-            }),
-        ))(remaining)?;
-        Ok((remaining, name))
     }
 }
+
+#[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
+fn _lesser_block_begin<'r, 's, 'x>(
+    context: Context<'r, 's>,
+    input: &'s str,
+    current_name_lower: &'x str,
+) -> Res<&'s str, &'s str> {
+    start_of_line(context, input)?;
+    let (remaining, _leading_whitespace) = space0(input)?;
+    let (remaining, (_begin, name)) = tuple((
+        tag_no_case("#+begin_"),
+        verify(name, |name: &str| {
+            name.to_lowercase().as_str() == current_name_lower
+        }),
+    ))(remaining)?;
+    Ok((remaining, name))
+}