From 4d114206ef5f25a01a5225252af61ab19cff913b Mon Sep 17 00:00:00 2001
From: Tom Alexander <tom@fizz.buzz>
Date: Fri, 21 Jul 2023 23:48:37 -0400
Subject: [PATCH] Create structure for line breaks.

---
 src/compare/diff.rs      | 25 +++++++++++++++++++++++++
 src/parser/line_break.rs | 13 +++++++++++++
 src/parser/mod.rs        |  2 ++
 src/parser/object.rs     | 13 +++++++++++++
 src/parser/token.rs      |  1 +
 5 files changed, 54 insertions(+)
 create mode 100644 src/parser/line_break.rs

diff --git a/src/compare/diff.rs b/src/compare/diff.rs
index 8d23c7d..e669d5d 100644
--- a/src/compare/diff.rs
+++ b/src/compare/diff.rs
@@ -31,6 +31,7 @@ use crate::parser::Italic;
 use crate::parser::Keyword;
 use crate::parser::LatexEnvironment;
 use crate::parser::LatexFragment;
+use crate::parser::LineBreak;
 use crate::parser::Object;
 use crate::parser::OrgMacro;
 use crate::parser::Paragraph;
@@ -170,6 +171,7 @@ fn compare_object<'s>(
         Object::CitationReference(obj) => compare_citation_reference(source, emacs, obj),
         Object::InlineBabelCall(obj) => compare_inline_babel_call(source, emacs, obj),
         Object::InlineSourceBlock(obj) => compare_inline_source_block(source, emacs, obj),
+        Object::LineBreak(obj) => compare_line_break(source, emacs, obj),
     }
 }
 
@@ -1438,3 +1440,26 @@ fn compare_inline_source_block<'s>(
         children: Vec::new(),
     })
 }
+
+fn compare_line_break<'s>(
+    source: &'s str,
+    emacs: &'s Token<'s>,
+    rust: &'s LineBreak<'s>,
+) -> Result<DiffResult, Box<dyn std::error::Error>> {
+    let mut this_status = DiffStatus::Good;
+    let emacs_name = "line-break";
+    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(),
+    })
+}
diff --git a/src/parser/line_break.rs b/src/parser/line_break.rs
new file mode 100644
index 0000000..f3407e2
--- /dev/null
+++ b/src/parser/line_break.rs
@@ -0,0 +1,13 @@
+use super::Context;
+use crate::error::Res;
+use crate::parser::util::not_yet_implemented;
+use crate::parser::CitationReference;
+
+#[tracing::instrument(ret, level = "debug")]
+pub fn citation_reference<'r, 's>(
+    context: Context<'r, 's>,
+    input: &'s str,
+) -> Res<&'s str, CitationReference<'s>> {
+    not_yet_implemented()?;
+    todo!()
+}
diff --git a/src/parser/mod.rs b/src/parser/mod.rs
index d1f911e..95e2729 100644
--- a/src/parser/mod.rs
+++ b/src/parser/mod.rs
@@ -25,6 +25,7 @@ mod latex_environment;
 mod latex_fragment;
 mod lesser_block;
 mod lesser_element;
+mod line_break;
 mod list;
 mod object;
 mod object_parser;
@@ -87,6 +88,7 @@ pub use object::InlineBabelCall;
 pub use object::InlineSourceBlock;
 pub use object::Italic;
 pub use object::LatexFragment;
+pub use object::LineBreak;
 pub use object::Object;
 pub use object::OrgMacro;
 pub use object::PlainLink;
diff --git a/src/parser/object.rs b/src/parser/object.rs
index 0e2c69d..725845a 100644
--- a/src/parser/object.rs
+++ b/src/parser/object.rs
@@ -23,6 +23,7 @@ pub enum Object<'s> {
     CitationReference(CitationReference<'s>),
     InlineBabelCall(InlineBabelCall<'s>),
     InlineSourceBlock(InlineSourceBlock<'s>),
+    LineBreak(LineBreak<'s>),
 }
 
 #[derive(Debug, PartialEq)]
@@ -149,6 +150,11 @@ pub struct InlineSourceBlock<'s> {
     pub source: &'s str,
 }
 
+#[derive(Debug, PartialEq)]
+pub struct LineBreak<'s> {
+    pub source: &'s str,
+}
+
 impl<'s> Source<'s> for Object<'s> {
     fn get_source(&'s self) -> &'s str {
         match self {
@@ -173,6 +179,7 @@ impl<'s> Source<'s> for Object<'s> {
             Object::CitationReference(obj) => obj.source,
             Object::InlineBabelCall(obj) => obj.source,
             Object::InlineSourceBlock(obj) => obj.source,
+            Object::LineBreak(obj) => obj.source,
         }
     }
 }
@@ -296,3 +303,9 @@ impl<'s> Source<'s> for InlineSourceBlock<'s> {
         self.source
     }
 }
+
+impl<'s> Source<'s> for LineBreak<'s> {
+    fn get_source(&'s self) -> &'s str {
+        self.source
+    }
+}
diff --git a/src/parser/token.rs b/src/parser/token.rs
index eb2c374..8f76b0e 100644
--- a/src/parser/token.rs
+++ b/src/parser/token.rs
@@ -62,6 +62,7 @@ impl<'r, 's> Token<'r, 's> {
                 Object::CitationReference(_) => Box::new(std::iter::empty()), // TODO: Iterate over children
                 Object::InlineBabelCall(_) => Box::new(std::iter::empty()),
                 Object::InlineSourceBlock(_) => Box::new(std::iter::empty()),
+                Object::LineBreak(_) => Box::new(std::iter::empty()),
             },
             Token::Element(elem) => match elem {
                 Element::Paragraph(inner) => Box::new(inner.children.iter().map(Token::Object)),