diff --git a/src/rstd/inlining.rs b/src/rstd/inlining.rs
index 9fcc9e7..573e12e 100644
--- a/src/rstd/inlining.rs
+++ b/src/rstd/inlining.rs
@@ -101,6 +101,8 @@ pub trait ConstSizeObject<'a, Ctx: Context<'a>>: FixedSizeObject<'a, Ctx> {
     const SIZE: usize;
 }
 
+pub type ADParseResult<A, D> = Result<(A, D), <A as Atomic>::AParseError>;
+
 /// Atomic analogue of [`InlineableFactory`]/[`InlineableObject`].
 pub trait InlineableAtomic: Atomic {
     fn a_extension_error(tail: &[u8]) -> Self::AParseError;