Create structure for inline babel calls.

src/parser/object.rs

@@ -21,6 +21,7 @@ pub enum Object<'s> {
     FootnoteReference(FootnoteReference<'s>),
     Citation(Citation<'s>),
     CitationReference(CitationReference<'s>),
+    InlineBabelCall(InlineBabelCall<'s>),
 }
 
 #[derive(Debug, PartialEq)]
@@ -137,6 +138,11 @@ pub struct CitationReference<'s> {
     pub source: &'s str,
 }
 
+#[derive(Debug, PartialEq)]
+pub struct InlineBabelCall<'s> {
+    pub source: &'s str,
+}
+
 impl<'s> Source<'s> for Object<'s> {
     fn get_source(&'s self) -> &'s str {
         match self {
@@ -159,6 +165,7 @@ impl<'s> Source<'s> for Object<'s> {
             Object::FootnoteReference(obj) => obj.source,
             Object::Citation(obj) => obj.source,
             Object::CitationReference(obj) => obj.source,
+            Object::InlineBabelCall(obj) => obj.source,
         }
     }
 }
@@ -270,3 +277,9 @@ impl<'s> Source<'s> for CitationReference<'s> {
         self.source
     }
 }
+
+impl<'s> Source<'s> for InlineBabelCall<'s> {
+    fn get_source(&'s self) -> &'s str {
+        self.source
+    }
+}