From 90ba17b68ccecb16256bb459a7ce8edf6f8218c9 Mon Sep 17 00:00:00 2001
From: Tom Alexander <tom@fizz.buzz>
Date: Tue, 31 Oct 2023 22:32:01 -0400
Subject: [PATCH] Switch to a numeric post-blank.

Turns out post-blank has different meanings to different object types so we need to return a number to properly do the compare.
---
 src/compare/util.rs              |  4 +--
 src/types/ast_node.rs            |  3 +-
 src/types/document.rs            |  9 ++---
 src/types/element.rs             |  3 +-
 src/types/greater_element.rs     | 25 +++++++-------
 src/types/lesser_element.rs      | 33 +++++++++---------
 src/types/mod.rs                 |  1 +
 src/types/object.rs              | 57 ++++++++++++++++----------------
 src/types/standard_properties.rs |  8 +++--
 9 files changed, 76 insertions(+), 67 deletions(-)

diff --git a/src/compare/util.rs b/src/compare/util.rs
index 0a8b424..5e60021 100644
--- a/src/compare/util.rs
+++ b/src/compare/util.rs
@@ -128,11 +128,11 @@ fn assert_post_blank<'b, 's, S: StandardProperties<'s> + ?Sized>(
     rust: &'b S,
 ) -> Result<(), Box<dyn std::error::Error>> {
     let standard_properties = get_emacs_standard_properties(emacs)?; // 1-based
-    let rust_post_blank = rust.get_post_blank().chars().count();
+    let rust_post_blank = rust.get_post_blank();
     let emacs_post_blank = standard_properties
         .post_blank
         .ok_or("Token should have a post-blank.")?;
-    if rust_post_blank != emacs_post_blank {
+    if rust_post_blank as usize != emacs_post_blank {
         Err(format!("Rust post-blank (in chars) {rust_post_blank} does not match emacs post-blank ({emacs_post_blank})", rust_post_blank = rust_post_blank, emacs_post_blank = emacs_post_blank))?;
     }
 
diff --git a/src/types/ast_node.rs b/src/types/ast_node.rs
index d634723..bd02c77 100644
--- a/src/types/ast_node.rs
+++ b/src/types/ast_node.rs
@@ -1,5 +1,6 @@
 use super::macros::to_ast_node;
 use super::CenterBlock;
+use super::PostBlank;
 use super::QuoteBlock;
 use super::SpecialBlock;
 use super::StandardProperties;
@@ -386,7 +387,7 @@ impl<'r, 's> StandardProperties<'s> for AstNode<'r, 's> {
         }
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         match self {
             AstNode::Document(inner) => inner.get_post_blank(),
             AstNode::Heading(inner) => inner.get_post_blank(),
diff --git a/src/types/document.rs b/src/types/document.rs
index 8c756c0..42b9754 100644
--- a/src/types/document.rs
+++ b/src/types/document.rs
@@ -3,6 +3,7 @@ use std::path::PathBuf;
 use super::Element;
 use super::NodeProperty;
 use super::Object;
+use super::PostBlank;
 use super::StandardProperties;
 use super::Timestamp;
 
@@ -62,7 +63,7 @@ impl<'s> StandardProperties<'s> for Document<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -76,7 +77,7 @@ impl<'s> StandardProperties<'s> for Section<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -90,7 +91,7 @@ impl<'s> StandardProperties<'s> for Heading<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -158,7 +159,7 @@ impl<'s> StandardProperties<'s> for DocumentElement<'s> {
         }
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         match self {
             DocumentElement::Heading(inner) => inner.get_post_blank(),
             DocumentElement::Section(inner) => inner.get_post_blank(),
diff --git a/src/types/element.rs b/src/types/element.rs
index 8c3b03b..4d34554 100644
--- a/src/types/element.rs
+++ b/src/types/element.rs
@@ -20,6 +20,7 @@ use super::lesser_element::SrcBlock;
 use super::lesser_element::VerseBlock;
 use super::CenterBlock;
 use super::Drawer;
+use super::PostBlank;
 use super::QuoteBlock;
 use super::SpecialBlock;
 use super::StandardProperties;
@@ -112,7 +113,7 @@ impl<'s> StandardProperties<'s> for Element<'s> {
         }
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         match self {
             Element::Paragraph(inner) => inner.get_post_blank(),
             Element::PlainList(inner) => inner.get_post_blank(),
diff --git a/src/types/greater_element.rs b/src/types/greater_element.rs
index f3e3fc3..c30d078 100644
--- a/src/types/greater_element.rs
+++ b/src/types/greater_element.rs
@@ -4,6 +4,7 @@ use super::lesser_element::TableCell;
 use super::AffiliatedKeywords;
 use super::Keyword;
 use super::Object;
+use super::PostBlank;
 use super::StandardProperties;
 
 #[derive(Debug)]
@@ -136,7 +137,7 @@ impl<'s> StandardProperties<'s> for PlainList<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -150,7 +151,7 @@ impl<'s> StandardProperties<'s> for PlainListItem<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -164,7 +165,7 @@ impl<'s> StandardProperties<'s> for CenterBlock<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -178,7 +179,7 @@ impl<'s> StandardProperties<'s> for QuoteBlock<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -192,7 +193,7 @@ impl<'s> StandardProperties<'s> for SpecialBlock<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -206,7 +207,7 @@ impl<'s> StandardProperties<'s> for DynamicBlock<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -220,7 +221,7 @@ impl<'s> StandardProperties<'s> for FootnoteDefinition<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -234,7 +235,7 @@ impl<'s> StandardProperties<'s> for Drawer<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -248,7 +249,7 @@ impl<'s> StandardProperties<'s> for PropertyDrawer<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -262,7 +263,7 @@ impl<'s> StandardProperties<'s> for NodeProperty<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -276,7 +277,7 @@ impl<'s> StandardProperties<'s> for Table<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -290,7 +291,7 @@ impl<'s> StandardProperties<'s> for TableRow<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
diff --git a/src/types/lesser_element.rs b/src/types/lesser_element.rs
index 68a2b9d..7d6b2ad 100644
--- a/src/types/lesser_element.rs
+++ b/src/types/lesser_element.rs
@@ -16,6 +16,7 @@ use super::object::Object;
 use super::AffiliatedKeywords;
 use super::GetAffiliatedKeywords;
 use super::PlainText;
+use super::PostBlank;
 use super::StandardProperties;
 use super::Timestamp;
 use crate::error::CustomError;
@@ -203,7 +204,7 @@ impl<'s> StandardProperties<'s> for Paragraph<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -217,7 +218,7 @@ impl<'s> StandardProperties<'s> for TableCell<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -231,7 +232,7 @@ impl<'s> StandardProperties<'s> for Comment<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -245,7 +246,7 @@ impl<'s> StandardProperties<'s> for VerseBlock<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -258,7 +259,7 @@ impl<'s> StandardProperties<'s> for CommentBlock<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -271,7 +272,7 @@ impl<'s> StandardProperties<'s> for ExampleBlock<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -284,7 +285,7 @@ impl<'s> StandardProperties<'s> for ExportBlock<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -297,7 +298,7 @@ impl<'s> StandardProperties<'s> for SrcBlock<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -311,7 +312,7 @@ impl<'s> StandardProperties<'s> for Clock<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -325,7 +326,7 @@ impl<'s> StandardProperties<'s> for DiarySexp<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -339,7 +340,7 @@ impl<'s> StandardProperties<'s> for Planning<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -353,7 +354,7 @@ impl<'s> StandardProperties<'s> for FixedWidthArea<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -367,7 +368,7 @@ impl<'s> StandardProperties<'s> for HorizontalRule<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -381,7 +382,7 @@ impl<'s> StandardProperties<'s> for Keyword<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -395,7 +396,7 @@ impl<'s> StandardProperties<'s> for BabelCall<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -409,7 +410,7 @@ impl<'s> StandardProperties<'s> for LatexEnvironment<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
diff --git a/src/types/mod.rs b/src/types/mod.rs
index 7dad80b..e142dce 100644
--- a/src/types/mod.rs
+++ b/src/types/mod.rs
@@ -110,4 +110,5 @@ pub use object::WarningDelay;
 pub use object::WarningDelayType;
 pub use object::Year;
 pub use object::YearInner;
+pub use standard_properties::PostBlank;
 pub use standard_properties::StandardProperties;
diff --git a/src/types/object.rs b/src/types/object.rs
index ed7bf0e..b77d849 100644
--- a/src/types/object.rs
+++ b/src/types/object.rs
@@ -6,6 +6,7 @@ use super::util::coalesce_whitespace_if_line_break;
 use super::util::remove_line_break;
 use super::util::remove_whitespace_if_line_break;
 use super::util::to_lowercase;
+use super::PostBlank;
 use super::StandardProperties;
 
 #[derive(Debug)]
@@ -523,7 +524,7 @@ impl<'s> StandardProperties<'s> for Bold<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -537,7 +538,7 @@ impl<'s> StandardProperties<'s> for Italic<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -551,7 +552,7 @@ impl<'s> StandardProperties<'s> for Underline<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -565,7 +566,7 @@ impl<'s> StandardProperties<'s> for StrikeThrough<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -579,7 +580,7 @@ impl<'s> StandardProperties<'s> for Code<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -593,7 +594,7 @@ impl<'s> StandardProperties<'s> for Verbatim<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -607,7 +608,7 @@ impl<'s> StandardProperties<'s> for RegularLink<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -621,7 +622,7 @@ impl<'s> StandardProperties<'s> for RadioLink<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -635,7 +636,7 @@ impl<'s> StandardProperties<'s> for RadioTarget<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -649,7 +650,7 @@ impl<'s> StandardProperties<'s> for PlainLink<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -663,7 +664,7 @@ impl<'s> StandardProperties<'s> for AngleLink<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -677,7 +678,7 @@ impl<'s> StandardProperties<'s> for OrgMacro<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -691,7 +692,7 @@ impl<'s> StandardProperties<'s> for Entity<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -705,7 +706,7 @@ impl<'s> StandardProperties<'s> for LatexFragment<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -719,7 +720,7 @@ impl<'s> StandardProperties<'s> for ExportSnippet<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -733,7 +734,7 @@ impl<'s> StandardProperties<'s> for FootnoteReference<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -747,7 +748,7 @@ impl<'s> StandardProperties<'s> for Citation<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -761,7 +762,7 @@ impl<'s> StandardProperties<'s> for CitationReference<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -775,7 +776,7 @@ impl<'s> StandardProperties<'s> for InlineBabelCall<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -789,7 +790,7 @@ impl<'s> StandardProperties<'s> for InlineSourceBlock<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -803,7 +804,7 @@ impl<'s> StandardProperties<'s> for LineBreak<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -817,7 +818,7 @@ impl<'s> StandardProperties<'s> for Target<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -831,7 +832,7 @@ impl<'s> StandardProperties<'s> for StatisticsCookie<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -845,7 +846,7 @@ impl<'s> StandardProperties<'s> for Subscript<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -859,7 +860,7 @@ impl<'s> StandardProperties<'s> for Superscript<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -873,7 +874,7 @@ impl<'s> StandardProperties<'s> for Timestamp<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -887,7 +888,7 @@ impl<'s> StandardProperties<'s> for PlainText<'s> {
         todo!()
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         todo!()
     }
 }
@@ -1048,7 +1049,7 @@ impl<'s> StandardProperties<'s> for Object<'s> {
         }
     }
 
-    fn get_post_blank<'b>(&'b self) -> &'s str {
+    fn get_post_blank<'b>(&'b self) -> PostBlank {
         match self {
             Object::Bold(inner) => inner.get_post_blank(),
             Object::Italic(inner) => inner.get_post_blank(),
diff --git a/src/types/standard_properties.rs b/src/types/standard_properties.rs
index e11dc54..49b8844 100644
--- a/src/types/standard_properties.rs
+++ b/src/types/standard_properties.rs
@@ -10,10 +10,10 @@ pub trait StandardProperties<'s> {
     /// This corresponds to :contents-begin to :contents-end
     fn get_contents<'b>(&'b self) -> &'s str;
 
-    /// Get the slice of the AST node's post-blank text.
+    /// Get the ast node's post-blank.
     ///
-    /// This is optional whitespace following the node.
-    fn get_post_blank<'b>(&'b self) -> &'s str;
+    /// For objects this is a count of the characters of whitespace after the object. For elements this is a count of the line breaks following an element.
+    fn get_post_blank<'b>(&'b self) -> PostBlank;
 }
 
 // TODO: Write some debugging code to alert when any of the unknown fields below are non-nil in our test data so we can see what these fields represent.
@@ -61,3 +61,5 @@ pub trait StandardProperties<'s> {
 // X :parent - Some weird numeric reference to the containing object. Since we output a tree structure, I do not see any value in including this, especially considering the back-references would be a nightmare in rust.
 
 // Special case: Plain text. Plain text counts :begin and :end from the start of the text (so :begin is always 0 AFAICT) and instead of including the full set of standard properties, it only includes :begin, :end, and :parent.
+
+pub type PostBlank = u8;