Add the code structure for diary sexp.

src/compare/diff.rs

@@ -4,6 +4,7 @@ use super::util::assert_name;
 use crate::parser::Clock;
 use crate::parser::Comment;
 use crate::parser::CommentBlock;
+use crate::parser::DiarySexp;
 use crate::parser::Document;
 use crate::parser::DocumentElement;
 use crate::parser::Drawer;
@@ -215,6 +216,7 @@ fn compare_element<'s>(
         Element::ExportBlock(obj) => compare_export_block(source, emacs, obj),
         Element::SrcBlock(obj) => compare_src_block(source, emacs, obj),
         Element::Clock(obj) => compare_clock(source, emacs, obj),
+        Element::DiarySexp(obj) => compare_diary_sexp(source, emacs, obj),
     }
 }
 
@@ -702,3 +704,26 @@ fn compare_clock<'s>(
         children: Vec::new(),
     })
 }
+
+fn compare_diary_sexp<'s>(
+    source: &'s str,
+    emacs: &'s Token<'s>,
+    rust: &'s DiarySexp<'s>,
+) -> Result<DiffResult, Box<dyn std::error::Error>> {
+    let mut this_status = DiffStatus::Good;
+    let emacs_name = "diary-sexp";
+    if assert_name(emacs, emacs_name).is_err() {
+        this_status = DiffStatus::Bad;
+    }
+
+    if assert_bounds(source, emacs, rust).is_err() {
+        this_status = DiffStatus::Bad;
+    }
+
+    Ok(DiffResult {
+        status: this_status,
+        name: emacs_name.to_owned(),
+        message: None,
+        children: Vec::new(),
+    })
+}

src/parser/diary_sexp.rs

@@ -0,0 +1,8 @@
+use super::Context;
+use crate::error::Res;
+use crate::parser::DiarySexp;
+
+#[tracing::instrument(ret, level = "debug")]
+pub fn diary_sexp<'r, 's>(context: Context<'r, 's>, input: &'s str) -> Res<&'s str, DiarySexp<'s>> {
+    todo!()
+}

src/parser/element.rs

@@ -7,6 +7,7 @@ use super::greater_element::Table;
 use super::lesser_element::Clock;
 use super::lesser_element::Comment;
 use super::lesser_element::CommentBlock;
+use super::lesser_element::DiarySexp;
 use super::lesser_element::ExampleBlock;
 use super::lesser_element::ExportBlock;
 use super::lesser_element::Paragraph;
@@ -32,6 +33,7 @@ pub enum Element<'s> {
     ExportBlock(ExportBlock<'s>),
     SrcBlock(SrcBlock<'s>),
     Clock(Clock<'s>),
+    DiarySexp(DiarySexp<'s>),
 }
 
 impl<'s> Source<'s> for Element<'s> {
@@ -52,6 +54,7 @@ impl<'s> Source<'s> for Element<'s> {
             Element::ExportBlock(obj) => obj.source,
             Element::SrcBlock(obj) => obj.source,
             Element::Clock(obj) => obj.source,
+            Element::DiarySexp(obj) => obj.source,
         }
     }
 }

src/parser/element_parser.rs

@@ -1,5 +1,6 @@
 use super::clock::clock;
 use super::comment::comment;
+use super::diary_sexp::diary_sexp;
 use super::drawer::drawer;
 use super::dynamic_block::dynamic_block;
 use super::element::Element;
@@ -47,6 +48,7 @@ pub fn non_paragraph_element<'r, 's>(
     let export_block_matcher = parser_with_context!(export_block)(context);
     let src_block_matcher = parser_with_context!(src_block)(context);
     let clock_matcher = parser_with_context!(clock)(context);
+    let diary_sexp_matcher = parser_with_context!(diary_sexp)(context);
     alt((
         map(plain_list_matcher, Element::PlainList),
         map(greater_block_matcher, Element::GreaterBlock),
@@ -61,5 +63,6 @@ pub fn non_paragraph_element<'r, 's>(
         map(export_block_matcher, Element::ExportBlock),
         map(src_block_matcher, Element::SrcBlock),
         map(clock_matcher, Element::Clock),
+        map(diary_sexp_matcher, Element::DiarySexp),
     ))(input)
 }

src/parser/lesser_element.rs

@@ -64,6 +64,11 @@ pub struct Clock<'s> {
     pub source: &'s str,
 }
 
+#[derive(Debug)]
+pub struct DiarySexp<'s> {
+    pub source: &'s str,
+}
+
 impl<'s> Paragraph<'s> {
     pub fn of_text(input: &'s str) -> Self {
         let mut objects = Vec::with_capacity(1);
@@ -124,3 +129,9 @@ impl<'s> Source<'s> for Clock<'s> {
         self.source
     }
 }
+
+impl<'s> Source<'s> for DiarySexp<'s> {
+    fn get_source(&'s self) -> &'s str {
+        self.source
+    }
+}

src/parser/mod.rs

@@ -1,5 +1,6 @@
 mod clock;
 mod comment;
+mod diary_sexp;
 mod document;
 mod drawer;
 mod dynamic_block;
@@ -41,6 +42,7 @@ pub use greater_element::TableRow;
 pub use lesser_element::Clock;
 pub use lesser_element::Comment;
 pub use lesser_element::CommentBlock;
+pub use lesser_element::DiarySexp;
 pub use lesser_element::ExampleBlock;
 pub use lesser_element::ExportBlock;
 pub use lesser_element::Paragraph;