From 8e70773b15ee2bbbaae24076c3d88a844c3f784d Mon Sep 17 00:00:00 2001
From: Tom Alexander <tom@fizz.buzz>
Date: Wed, 4 Oct 2023 18:11:38 -0400
Subject: [PATCH] Fix handling cases where only language is specified before
 parameters.

---
 src/parser/lesser_block.rs | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/src/parser/lesser_block.rs b/src/parser/lesser_block.rs
index a04e562..411edc0 100644
--- a/src/parser/lesser_block.rs
+++ b/src/parser/lesser_block.rs
@@ -15,9 +15,9 @@ use nom::combinator::peek;
 use nom::combinator::recognize;
 use nom::combinator::verify;
 use nom::multi::many_till;
-use nom::multi::separated_list0;
 use nom::multi::separated_list1;
 use nom::sequence::tuple;
+use nom::InputTake;
 
 use super::org_source::OrgSource;
 use crate::context::parser_with_context;
@@ -425,13 +425,18 @@ fn _example_src_switches<'s>(
     let (remaining, (source, words)) = if language.is_none() {
         consumed(separated_list1(space1, switch_word(stop_at_parameters)))(remaining)?
     } else {
-        map(
+        let (remain, maybe_words) = opt(map(
             tuple((
                 space1,
-                consumed(separated_list0(space1, switch_word(stop_at_parameters))),
+                consumed(separated_list1(space1, switch_word(stop_at_parameters))),
             )),
             |(_, words)| words,
-        )(remaining)?
+        ))(remaining)?;
+        if let Some((source, words)) = maybe_words {
+            (remain, (source, words))
+        } else {
+            (remain, (remaining.take(0), Vec::new()))
+        }
     };
 
     let mut state = SwitchState::Normal;