Port paragraph parser to use ak_element.

src/parser/macros.rs

@@ -23,3 +23,18 @@ macro_rules! ak_element {
 }
 
 pub(crate) use ak_element;
+
+macro_rules! element {
+    ($parser:ident, $context: expr, $input: expr, $wrapper: expr) => {
+        if let Ok((remaining, ele)) = $parser($context, $input) {
+            return Ok((remaining, $wrapper(ele)));
+        }
+    };
+    ($parser:ident, $context: expr, $input: expr) => {
+        if let Ok((remaining, ele)) = $parser($context, $input) {
+            return Ok((remaining, ele));
+        }
+    };
+}
+
+pub(crate) use element;