feat: add informal equation support

1 files changed, 16 insertions, 3 deletions

diff --git a/src/description.rs b/src/description.rs
index 615b0c2..3a5b26f 100644
--- a/src/description.rs
+++ b/src/description.rs
@@ -280,6 +280,9 @@ pub enum ParagraphPart
 
     /// Table part.
     Table(Table),
+
+    /// Informal equation part.
+    InformalEquation(String),
 }
 
 impl FromElements for ParagraphPart
@@ -316,7 +319,7 @@ impl ParagraphPart
             "programlisting" => Self::ProgramListing,
             "citerefentry" => Self::Entry,
             "variablelist" | "itemizedlist" | "informaltable" | "para" | "footnote"
-            | "table" => |_| {
+            | "table" | "informalequation" => |_| {
                 unreachable!();
             },
             _ => {
@@ -392,6 +395,16 @@ impl ParagraphPart
             return Ok(Self::Table(table));
         }
 
+        if tagged_element.name() == "informalequation" {
+            return Ok(Self::InlineEquation(
+                tagged_element
+                    .child_elements()
+                    .into_iter()
+                    .map(ToString::to_string)
+                    .collect::<String>(),
+            ));
+        }
+
         let text_element = tagged_element
             .child_elements()
             .get_first_text_element()
@@ -409,8 +422,8 @@ pub enum ParagraphPartError
     #[error("Expected a text element")]
     ExpectedTextElement,
 
-    /// A input element is a unknown description part.
-    #[error("Input element with name '{0}' is a unknown description part")]
+    /// A input element is a unknown paragraph part.
+    #[error("Input element with name '{0}' is a unknown paragraph part")]
     UnknownPart(String),
 
     /// No text was found in tagged input element.