Trace span events.

src/main.rs

@@ -1,6 +1,7 @@
 use crate::parser::document;
 use tracing::trace;
 use tracing::Level;
+use tracing_subscriber::fmt::format::FmtSpan;
 
 mod parser;
 
@@ -15,10 +16,11 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     let subscriber = tracing_subscriber::fmt()
         .event_format(format)
         .with_max_level(Level::TRACE)
+        .with_span_events(FmtSpan::ENTER | FmtSpan::EXIT)
         .finish();
     tracing::subscriber::set_global_default(subscriber)?;
-    trace!("TESTING");
+    let parsed = document(TEST_DOC);
     println!("{}\n\n\n", TEST_DOC);
-    println!("{:#?}", document(TEST_DOC));
+    println!("{:#?}", parsed);
     Ok(())
 }

src/parser/text.rs

@@ -25,6 +25,7 @@ use nom::multi::many1;
 use nom::multi::many_till;
 use nom::sequence::tuple;
 use nom::IResult;
+use tracing::instrument;
 
 use super::nom_context::ContextTree;
 use super::nom_context::OrgModeContextTree;
@@ -137,6 +138,7 @@ pub fn paragraph_end(input: &str) -> Res<&str, &str> {
     recognize(tuple((map(line_break, TextElement::LineBreak), blank_line)))(input)
 }
 
+#[instrument]
 pub fn document(input: &str) -> Res<&str, Vec<(Vec<TextElement>, &str)>> {
     let initial_context = ContextTree::new();
     let paragraph_context = initial_context.with_additional_fail_matcher(&paragraph_end);