addresses moved to core

src/core.rs

@@ -2,7 +2,7 @@
 //! Brings [`Mentionable`]/[`Factory`]/[`Origin`] concepts from the original implementation in Python.
 //! Allows for more generic behaviour via [`Context`], as opposed to original async-only.
 
-use std::{error::Error, fmt::Display, rc::Rc};
+use std::{cmp::min, error::Error, fmt::Display, rc::Rc};
 
 use crate::func::*;
 
@@ -155,6 +155,7 @@ pub trait Factory<'a, Ctx: 'a + Context>: Clone + 'a {
         &self,
         deserializer: &mut dyn Deserializer,
         resolver: Rc<dyn Resolver<'a, Ctx>>,
+        addresses: &mut Addresses,
     ) -> ParseResult<'a, Ctx, Self>;
     /// Called by finite stream parsers if there's any data left.
     fn unexpected_tail(&self, tail: &[u8]) -> Self::ParseError;
@@ -231,6 +232,22 @@ impl<'a, Ctx: 'a + Context, A: Mentionable<'a, Ctx>> Point<'a, Ctx, A> {
             LocalOrigin::from(mentionable),
         )
     }
+
+    /// Make a [Point] from an [Address].
+    pub fn from_address(
+        address: Address,
+        factory: A::Fctr,
+        resolver: Rc<dyn Resolver<'a, Ctx>>,
+    ) -> Self {
+        Point {
+            point: address.point,
+            origin: Rc::new(ResolverOrigin {
+                r_factory: factory,
+                r_address: address,
+                r_resolver: resolver,
+            }),
+        }
+    }
 }
 
 impl<'a, Ctx: 'a + Context, A: Mentionable<'a, Ctx>> From<A> for Point<'a, Ctx, A> {
@@ -251,8 +268,8 @@ pub struct TypelessMentionable<'a, Ctx: 'a + Context> {
 
 type TypelessParsed<'a, Ctx> = Result<TypelessMentionable<'a, Ctx>, Box<dyn 'a + Error>>;
 
-type TypelessDeserialize<'a, Ctx> =
+type TypelessDeserialize<'a, Ctx> = dyn 'a
-    dyn 'a + Fn(&mut dyn Deserializer, Rc<dyn Resolver<'a, Ctx>>) -> TypelessParsed<'a, Ctx>;
+    + Fn(&mut dyn Deserializer, Rc<dyn Resolver<'a, Ctx>>, &mut Addresses) -> TypelessParsed<'a, Ctx>;
 
 type TypelessUnexpectedTail<'a> = dyn 'a + Fn(&[u8]) -> TypelessError<'a>;
 
@@ -318,8 +335,9 @@ impl<'a, Ctx: 'a + Context> Factory<'a, Ctx> for TypelessFactory<'a, Ctx> {
         &self,
         deserializer: &mut dyn Deserializer,
         resolver: Rc<dyn Resolver<'a, Ctx>>,
+        addresses: &mut Addresses,
     ) -> ParseResult<'a, Ctx, Self> {
-        match (self.t_deserialize)(deserializer, resolver) {
+        match (self.t_deserialize)(deserializer, resolver, addresses) {
             Ok(mentionable) => Ok(mentionable),
             Err(error) => Err(TypelessError(error)),
         }
@@ -348,8 +366,8 @@ impl<'a, Ctx: 'a + Context> TypelessFactory<'a, Ctx> {
     pub fn from_typed<F: Factory<'a, Ctx>>(factory: F) -> Self {
         let tail_factory = factory.clone();
         TypelessFactory {
-            t_deserialize: Rc::new(move |deserializer, resolver| {
+            t_deserialize: Rc::new(move |deserializer, resolver, addresses| {
-                match factory.deserialize(deserializer, resolver) {
+                match factory.deserialize(deserializer, resolver, addresses) {
                     Ok(mentionable) => Ok(TypelessMentionable::from_typed(Rc::new(mentionable))),
                     Err(error) => Err(Box::new(error)),
                 }
@@ -366,3 +384,158 @@ impl<'a> TypelessError<'a> {
         TypelessError(Box::new(error))
     }
 }
+
+/// Preferred way to parse [Point]s off of a [Serializer].
+pub struct Addresses {
+    current: usize,
+}
+
+impl Addresses {
+    /// Read the next [Address].
+    pub fn next<'a>(
+        &mut self,
+        deserializer: &'a mut dyn Deserializer,
+    ) -> Result<Address, &'a [u8]> {
+        let point = deserializer.read_n_const::<HASH_SIZE>()?;
+        let address = Address {
+            point,
+            index: self.current,
+        };
+        self.current += 1;
+        Ok(address)
+    }
+
+    /// Read the next [Point].
+    pub fn next_point<'a, 'b, Ctx: 'a + Context, A: Mentionable<'a, Ctx>>(
+        &mut self,
+        deserializer: &'b mut dyn Deserializer,
+        resolver: Rc<dyn Resolver<'a, Ctx>>,
+        factory: A::Fctr,
+    ) -> Result<Point<'a, Ctx, A>, &'b [u8]> {
+        Ok(Point::from_address(
+            self.next(deserializer)?,
+            factory,
+            resolver,
+        ))
+    }
+
+    /// Start reading the [Address]es.
+    fn start() -> Self {
+        Addresses { current: 0 }
+    }
+}
+
+pub trait ExtDeserializer {
+    fn read_n_const<const N: usize>(&mut self) -> Result<[u8; N], &[u8]>;
+}
+
+impl<D: ?Sized + Deserializer> ExtDeserializer for D {
+    fn read_n_const<const N: usize>(&mut self) -> Result<[u8; N], &[u8]> {
+        let slice = self.read_n(N);
+        match slice.try_into() {
+            Ok(array) => Ok(array),
+            Err(_) => Err(slice),
+        }
+    }
+}
+
+struct ResolverOrigin<'a, Ctx: 'a + Context, F: Factory<'a, Ctx>> {
+    r_factory: F,
+    r_address: Address,
+    r_resolver: Rc<dyn Resolver<'a, Ctx>>,
+}
+
+fn _resolve_origin<'a, Ctx: 'a + Context, A: Mentionable<'a, Ctx>>(
+    origin: Rc<ResolverOrigin<'a, Ctx, A::Fctr>>,
+) -> Resolution<'a, Ctx, A> {
+    let resolution = origin.r_resolver.clone().resolve(origin.r_address);
+    Ctx::T::fmap(
+        move |resolved| match resolved {
+            Ok((src, resolver)) => match origin.r_factory.parse_slice(&src, resolver) {
+                Ok(mentionable) => Ok(Rc::new(mentionable)),
+                Err(parse_error) => Err(ResolutionError::Parse(parse_error)),
+            },
+            Err(lookup_error) => Err(ResolutionError::Lookup(lookup_error)),
+        },
+        resolution,
+    )
+}
+
+impl<'a, Ctx: 'a + Context, F: Factory<'a, Ctx>> Origin<'a, Ctx> for ResolverOrigin<'a, Ctx, F> {
+    type Mtbl = F::Mtbl;
+
+    fn factory(&self) -> <Self::Mtbl as Mentionable<'a, Ctx>>::Fctr {
+        self.r_factory.clone()
+    }
+
+    fn resolve(self: Rc<Self>) -> Resolution<'a, Ctx, Self::Mtbl> {
+        _resolve_origin(self)
+    }
+}
+
+fn _parse_slice<'a, Ctx: 'a + Context, A: Mentionable<'a, Ctx>>(
+    factory: &A::Fctr,
+    slice: &[u8],
+    resolver: Rc<dyn Resolver<'a, Ctx>>,
+) -> ParseResult<'a, Ctx, A::Fctr> {
+    let mut deserializer = SliceDeserializer::from(slice);
+    let mentionable = factory.deserialize(&mut deserializer, resolver, &mut Addresses::start())?;
+    let tail = deserializer.read_all();
+    if tail.is_empty() {
+        Ok(mentionable)
+    } else {
+        Err(factory.unexpected_tail(tail))
+    }
+}
+
+pub trait ExtFactory<'a, Ctx: 'a + Context>: Factory<'a, Ctx> {
+    fn parse_slice(
+        &self,
+        slice: &[u8],
+        resolver: Rc<dyn Resolver<'a, Ctx>>,
+    ) -> ParseResult<'a, Ctx, Self>;
+}
+
+impl<'a, Ctx: 'a + Context, F: Factory<'a, Ctx>> ExtFactory<'a, Ctx> for F {
+    fn parse_slice(
+        &self,
+        slice: &[u8],
+        resolver: Rc<dyn Resolver<'a, Ctx>>,
+    ) -> ParseResult<'a, Ctx, Self> {
+        _parse_slice::<Ctx, F::Mtbl>(self, slice, resolver)
+    }
+}
+
+pub struct SliceDeserializer<'a> {
+    slice: &'a [u8],
+    pos: usize,
+}
+
+impl<'a> From<&'a [u8]> for SliceDeserializer<'a> {
+    fn from(value: &'a [u8]) -> Self {
+        SliceDeserializer {
+            slice: value,
+            pos: 0,
+        }
+    }
+}
+
+impl<'a> Deserializer for SliceDeserializer<'a> {
+    fn read_n(&mut self, n: usize) -> &[u8] {
+        let (left, right) = self.slice.split_at(min(n, self.slice.len()));
+        self.slice = right;
+        self.pos += left.len();
+        left
+    }
+
+    fn read_all(&mut self) -> &[u8] {
+        let left = self.slice;
+        self.slice = &[];
+        self.pos += left.len();
+        left
+    }
+
+    fn tell(&self) -> usize {
+        self.pos
+    }
+}

src/std.rs

@@ -1,10 +1,11 @@
+//! Standard extensions to [`crate::core`].
+
 pub mod atomic;
 pub mod cast;
 pub mod collections;
 pub mod inlining;
 pub mod nullable;
 
-use std::cmp::min;
 use std::{error::Error, fmt::Display, rc::Rc};
 
 use crate::core::*;
@@ -161,62 +162,12 @@ impl From<&[u8]> for PointParseError {
     }
 }
 
-impl<'a, Ctx: 'a + Context, A: Mentionable<'a, Ctx>> Point<'a, Ctx, A> {
-    fn from_address(
-        address: Address,
-        factory: A::Fctr,
-        resolver: Rc<dyn Resolver<'a, Ctx>>,
-    ) -> Self {
-        Point {
-            point: address.point,
-            origin: Rc::new(ResolverOrigin {
-                r_factory: factory,
-                r_address: address,
-                r_resolver: resolver,
-            }),
-        }
-    }
-}
-
 impl<'a, Ctx: 'a + Context, A: Mentionable<'a, Ctx>> AsRef<[u8]> for Point<'a, Ctx, A> {
     fn as_ref(&self) -> &[u8] {
         &self.point
     }
 }
 
-pub struct Addresses {
-    current: usize,
-}
-
-impl Addresses {
-    fn next<'a>(&mut self, deserializer: &'a mut dyn Deserializer) -> Result<Address, &'a [u8]> {
-        let point = deserializer.read_n_const::<HASH_SIZE>()?;
-        let address = Address {
-            point,
-            index: self.current,
-        };
-        self.current += 1;
-        Ok(address)
-    }
-
-    fn next_point<'a, 'b, Ctx: 'a + Context, A: Mentionable<'a, Ctx>>(
-        &mut self,
-        deserializer: &'b mut dyn Deserializer,
-        resolver: Rc<dyn Resolver<'a, Ctx>>,
-        factory: A::Fctr,
-    ) -> Result<Point<'a, Ctx, A>, &'b [u8]> {
-        Ok(Point::from_address(
-            self.next(deserializer)?,
-            factory,
-            resolver,
-        ))
-    }
-
-    fn start() -> Self {
-        Addresses { current: 0 }
-    }
-}
-
 impl<'a, Ctx: 'a + Context, F: Factory<'a, Ctx>> Factory<'a, Ctx> for PointFactory<F> {
     type Mtbl = Point<'a, Ctx, F::Mtbl>;
 
@@ -226,8 +177,8 @@ impl<'a, Ctx: 'a + Context, F: Factory<'a, Ctx>> Factory<'a, Ctx> for PointFacto
         &self,
         deserializer: &mut dyn Deserializer,
         resolver: Rc<dyn Resolver<'a, Ctx>>,
+        addresses: &mut Addresses,
     ) -> ParseResult<'a, Ctx, Self> {
-        let mut addresses = Addresses::start();
         Ok(addresses.next_point(deserializer, resolver, self.factory.clone())?)
     }
 
@@ -236,121 +187,6 @@ impl<'a, Ctx: 'a + Context, F: Factory<'a, Ctx>> Factory<'a, Ctx> for PointFacto
     }
 }
 
-struct ResolverOrigin<'a, Ctx: 'a + Context, F: Factory<'a, Ctx>> {
-    r_factory: F,
-    r_address: Address,
-    r_resolver: Rc<dyn Resolver<'a, Ctx>>,
-}
-
-fn _resolve_origin<'a, Ctx: 'a + Context, A: Mentionable<'a, Ctx>>(
-    origin: Rc<ResolverOrigin<'a, Ctx, A::Fctr>>,
-) -> Resolution<'a, Ctx, A> {
-    let resolution = origin.r_resolver.clone().resolve(origin.r_address);
-    Ctx::T::fmap(
-        move |resolved| match resolved {
-            Ok((src, resolver)) => match origin.r_factory.parse_slice(&src, resolver) {
-                Ok(mentionable) => Ok(Rc::new(mentionable)),
-                Err(parse_error) => Err(ResolutionError::Parse(parse_error)),
-            },
-            Err(lookup_error) => Err(ResolutionError::Lookup(lookup_error)),
-        },
-        resolution,
-    )
-}
-
-impl<'a, Ctx: 'a + Context, F: Factory<'a, Ctx>> Origin<'a, Ctx> for ResolverOrigin<'a, Ctx, F> {
-    type Mtbl = F::Mtbl;
-
-    fn factory(&self) -> <Self::Mtbl as Mentionable<'a, Ctx>>::Fctr {
-        self.r_factory.clone()
-    }
-
-    fn resolve(self: Rc<Self>) -> Resolution<'a, Ctx, Self::Mtbl> {
-        _resolve_origin(self)
-    }
-}
-
-struct SliceDeserializer<'a> {
-    slice: &'a [u8],
-    pos: usize,
-}
-
-impl<'a> From<&'a [u8]> for SliceDeserializer<'a> {
-    fn from(value: &'a [u8]) -> Self {
-        SliceDeserializer {
-            slice: value,
-            pos: 0,
-        }
-    }
-}
-
-impl<'a> Deserializer for SliceDeserializer<'a> {
-    fn read_n(&mut self, n: usize) -> &[u8] {
-        let (left, right) = self.slice.split_at(min(n, self.slice.len()));
-        self.slice = right;
-        self.pos += left.len();
-        left
-    }
-
-    fn read_all(&mut self) -> &[u8] {
-        let left = self.slice;
-        self.slice = &[];
-        self.pos += left.len();
-        left
-    }
-
-    fn tell(&self) -> usize {
-        self.pos
-    }
-}
-
-fn _parse_slice<'a, Ctx: 'a + Context, A: Mentionable<'a, Ctx>>(
-    factory: &A::Fctr,
-    slice: &[u8],
-    resolver: Rc<dyn Resolver<'a, Ctx>>,
-) -> ParseResult<'a, Ctx, A::Fctr> {
-    let mut deserializer = SliceDeserializer::from(slice);
-    let mentionable = factory.deserialize(&mut deserializer, resolver)?;
-    let tail = deserializer.read_all();
-    if tail.is_empty() {
-        Ok(mentionable)
-    } else {
-        Err(factory.unexpected_tail(tail))
-    }
-}
-
-pub trait ExtFactory<'a, Ctx: 'a + Context>: Factory<'a, Ctx> {
-    fn parse_slice(
-        &self,
-        slice: &[u8],
-        resolver: Rc<dyn Resolver<'a, Ctx>>,
-    ) -> ParseResult<'a, Ctx, Self>;
-}
-
-impl<'a, Ctx: 'a + Context, F: Factory<'a, Ctx>> ExtFactory<'a, Ctx> for F {
-    fn parse_slice(
-        &self,
-        slice: &[u8],
-        resolver: Rc<dyn Resolver<'a, Ctx>>,
-    ) -> ParseResult<'a, Ctx, Self> {
-        _parse_slice::<Ctx, F::Mtbl>(self, slice, resolver)
-    }
-}
-
-pub trait ExtDeserializer {
-    fn read_n_const<const N: usize>(&mut self) -> Result<[u8; N], &[u8]>;
-}
-
-impl<D: ?Sized + Deserializer> ExtDeserializer for D {
-    fn read_n_const<const N: usize>(&mut self) -> Result<[u8; N], &[u8]> {
-        let slice = self.read_n(N);
-        match slice.try_into() {
-            Ok(array) => Ok(array),
-            Err(_) => Err(slice),
-        }
-    }
-}
-
 impl Display for Address {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         f.write_fmt(format_args!("{}@{}", hex::encode(self.point), self.index))

src/std/atomic/atomic_object.rs

@@ -1,7 +1,10 @@
+//! Provides [Atomic]-[Mentionable] interface.
+
 use std::ops::Deref;
 
 use super::*;
 
+/// Generic implementation of a [Mentionable] for [Atomic]s.
 pub struct AtomicObject<A: Atomic> {
     atomic: A,
 }
@@ -46,12 +49,14 @@ impl<'a, Ctx: 'a + Context, A: Atomic> Mentionable<'a, Ctx> for AtomicObject<A>
     fn points(&self, _points: &mut Vec<Point<'a, Ctx, TypelessMentionable<'a, Ctx>>>) {}
 }
 
-/// Generic implementation of a factory for [Atomic]s.
+/// Generic implementation of a [Factory] for [Atomic]s.
-pub struct AtomicFactory<A: Atomic>(PhantomData<A>);
+pub struct AtomicFactory<A: Atomic> {
+    _pd: PhantomData<A>,
+}
 
 impl<A: Atomic> AtomicFactory<A> {
     fn new() -> Self {
-        AtomicFactory(PhantomData)
+        AtomicFactory { _pd: PhantomData }
     }
 }
 
@@ -70,6 +75,7 @@ impl<'a, Ctx: 'a + Context, A: Atomic> Factory<'a, Ctx> for AtomicFactory<A> {
         &self,
         deserializer: &mut dyn Deserializer,
         _resolver: Rc<dyn Resolver<'a, Ctx>>,
+        _addresses: &mut Addresses,
     ) -> ParseResult<'a, Ctx, Self> {
         Ok(A::deserialize(deserializer)?.into())
     }

src/std/collections/pair.rs

@@ -1,3 +1,5 @@
+//! [`Pair`] implementation based on [`StaticPair`].
+
 use std::error::Error;
 use std::fmt::Display;
 
@@ -18,7 +20,7 @@ impl<A: Serializable, B: Serializable> StaticPairSerializable for Pair<A, B> {
     type SA = A;
     type SB = B;
 
-    fn s_elements(&self) -> (&Self::SA, &Self::SB) {
+    fn elements(&self) -> (&Self::SA, &Self::SB) {
         (&self.a, &self.b)
     }
 }
@@ -89,8 +91,4 @@ where
             b: self.b.factory(),
         }
     }
-
-    fn elements(&self) -> (&Self::A, &Self::B) {
-        (&self.a, &self.b)
-    }
 }

src/std/collections/stack.rs

@@ -88,16 +88,23 @@ impl<'a, Ctx: 'a + Context, A: Mentionable<'a, Ctx>> Factory<'a, Ctx>
         &self,
         deserializer: &mut dyn Deserializer,
         resolver: Rc<dyn Resolver<'a, Ctx>>,
+        addresses: &mut Addresses,
     ) -> ParseResult<'a, Ctx, Self> {
-        let rest =
+        let rest = match NullableFactory::new(self.clone()).deserialize(
-            match NullableFactory::new(self.clone()).deserialize(deserializer, resolver.clone()) {
+            deserializer,
+            resolver.clone(),
+            addresses,
+        ) {
             Ok(rest) => rest,
             Err(ppe) => {
                 return Err(StackParseError::Point(ppe));
             }
         };
         let element = Rc::new(
-            match self.element_factory.deserialize(deserializer, resolver) {
+            match self
+                .element_factory
+                .deserialize(deserializer, resolver, addresses)
+            {
                 Ok(element) => element,
                 Err(epe) => {
                     return Err(StackParseError::Element(epe));

src/std/inlining.rs

@@ -1,3 +1,5 @@
+//! Traits to better express parsing semantics.
+
 pub mod static_pair;
 
 use super::atomic::atomic_object::*;
@@ -5,28 +7,44 @@ use super::atomic::*;
 use crate::core::*;
 use crate::std::*;
 
+/// This factory should return an error on EOF.
 pub trait InlineableFactory {}
 
+/// This factory always reads the same amount of bytes or returns error.
 pub trait FixedSizeFactory: InlineableFactory {
+    /// For [`ConstSizeFactory`] this must return [`ConstSizeFactory::SIZE`].
     fn size(&self) -> usize;
 }
 
+/// Compile-time analogue of [`FixedSizeFactory`].
 pub trait ConstSizeFactory: FixedSizeFactory {
+    /// Must be equal to [`FixedSizeFactory::size()`].
     const SIZE: usize;
 }
 
+/// Object analogue of [`InlineableFactory`].
 pub trait InlineableObject<'a, Ctx: 'a + Context>: 'a {}
 
+/// Object analogue of [`FixedSizeFactory`].
 pub trait FixedSizeObject<'a, Ctx: 'a + Context>: InlineableObject<'a, Ctx> {
+    /// For [`ConstSizeObject`] this must return [`ConstSizeObject::SIZE`].
     fn size(&self) -> usize;
 }
 
+/// Object analogue of [`ConstSizeFactory`].
 pub trait ConstSizeObject<'a, Ctx: 'a + Context>: FixedSizeObject<'a, Ctx> {
+    /// Must be equal to [`FixedSizeObject::size()`].
     const SIZE: usize;
 }
 
+/// Atomic analogue of [`InlineableFactory`]/[`InlineableObject`].
 pub trait InlineableAtomic {}
 
+/// Atomic analogue of [`ConstSizeFactory`]/[`ConstSizeObject`].
+///
+/// Note: `FixedSizeAtomic` doesn't exist because it would
+/// either be const anyway
+/// or have a very undesireable implementation.
 pub trait ConstSizeAtomic: InlineableAtomic {
     const SIZE: usize;
 }
@@ -64,6 +82,7 @@ where
     const SIZE: usize = A::Fctr::SIZE;
 }
 
+/// Error returned by [`CheckedParse::deserialize_checked`]/[`CheckedSerialize::serialize_checked`].
 #[derive(Debug)]
 pub struct SizeError {
     expected: usize,
@@ -81,6 +100,7 @@ impl Display for SizeError {
 
 impl Error for SizeError {}
 
+/// Wrapper for [`SizeError`]/[`Factory::ParseError`].
 #[derive(Debug)]
 pub enum CheckedParseError<P: Error> {
     Parse(P),
@@ -104,18 +124,24 @@ impl<P: Error> From<P> for CheckedParseError<P> {
     }
 }
 
+/// Returned by [`CheckedParse::deserialize_checked`].
 pub type CheckedParseResult<'a, Ctx, F> =
     Result<<F as Factory<'a, Ctx>>::Mtbl, CheckedParseError<<F as Factory<'a, Ctx>>::ParseError>>;
 
+/// Extension trait for factories that ensures fixed size read.
 pub trait CheckedParse<'a, Ctx: 'a + Context>: FixedSizeFactory + Factory<'a, Ctx> {
+    /// Verify proper read length using [`Deserializer::tell`].
     fn deserialize_checked(
         &self,
         deserializer: &mut dyn Deserializer,
         resolver: Rc<dyn Resolver<'a, Ctx>>,
+        addresses: &mut Addresses,
     ) -> CheckedParseResult<'a, Ctx, Self>;
 }
 
+/// Extension trait for factories that ensures fixed size write.
 pub trait CheckedSerialize<'a, Ctx: 'a + Context>: Serializable + FixedSizeObject<'a, Ctx> {
+    /// Verify proper write length using [`Serializer::tell`].
     fn serialize_checked(&self, serializer: &mut dyn Serializer) -> Result<(), SizeError>;
 }
 
@@ -124,10 +150,11 @@ impl<'a, Ctx: 'a + Context, F: FixedSizeFactory + Factory<'a, Ctx>> CheckedParse
         &self,
         deserializer: &mut dyn Deserializer,
         resolver: Rc<dyn Resolver<'a, Ctx>>,
+        addresses: &mut Addresses,
     ) -> CheckedParseResult<'a, Ctx, Self> {
         let expected_size = self.size();
         let start = deserializer.tell();
-        let result = self.deserialize(deserializer, resolver)?;
+        let result = self.deserialize(deserializer, resolver, addresses)?;
         let end = deserializer.tell();
         let received_size = end - start;
         if received_size == expected_size {
@@ -161,6 +188,9 @@ impl<'a, Ctx: 'a + Context, A: Mentionable<'a, Ctx> + FixedSizeObject<'a, Ctx>>
     }
 }
 
+/// Trait useful for objects which aren't influenced by
+/// whether some other type (for example, a generic parameter type)
+/// is fixed-size or not.
 pub trait AlwaysFixedSize {
     fn _size(&self) -> usize;
 }
@@ -173,6 +203,7 @@ impl<F: AlwaysFixedSize> FixedSizeFactory for F {
     }
 }
 
+/// Compile-time analogue of [`AlwaysFixedSize`].
 pub trait AlwaysConstSize {
     const _SIZE: usize;
 }

src/std/inlining/static_pair.rs

@@ -1,39 +1,66 @@
+//! Generic implementation for objects that are structured
+//! like a pair of two other objects.
+
 use std::ops::Deref;
 
 use super::*;
 use crate::core::*;
 
+/// Trait to represent serialisation of object's data.
+/// Due to serialisation being [Context]-free in RADN,
+/// this functionality is in a separate trait.
 pub trait StaticPairSerializable {
+    /// First element's type. Must equal [`StaticPair::A`].
     type SA: Serializable;
+    /// Second element's type. Must equal [`StaticPair::B`].
     type SB: Serializable;
 
-    fn s_elements(&self) -> (&Self::SA, &Self::SB);
+    /// Borrow both elements.
+    fn elements(&self) -> (&Self::SA, &Self::SB);
 }
 
+/// Trait to be implemented on object data.
+///
+/// [`StaticPair::FA`]/[`StaticPair::FB`] are required members
+/// for clarity and [`StaticPair`]'s simpler implementation
+/// at the cost of having to specify two extra fields.
+///
+/// Note: [`StaticPair::FA`] requires [`InlineableFactory`] be implemented.
 pub trait StaticPair<'a, Ctx: 'a + Context>:
     'a + StaticPairSerializable<SA = Self::A, SB = Self::B>
 {
+    /// [Factory] data. May, depending on the usecase, include factory (factories) on the element(s).
     type FactoryData: 'a + Clone;
+    /// First element's type. Must equal [`StaticPairSerializable::SA`].
     type A: Mentionable<'a, Ctx, Fctr = Self::FA>;
+    /// Second element's type. Must equal [`StaticPairSerializable::SB`].
     type B: Mentionable<'a, Ctx, Fctr = Self::FB>;
+    /// First element's factory.
     type FA: Factory<'a, Ctx, Mtbl = Self::A> + InlineableFactory;
+    /// Second element's factory.
     type FB: Factory<'a, Ctx, Mtbl = Self::B>;
+    /// See [Factory::ParseError].
     type ParseError: 'a + Error;
 
+    /// Borrow both elements' factories.
     fn factories(factory_data: &Self::FactoryData) -> (&Self::FA, &Self::FB);
+    /// Construct the object from the elements.
     fn from_parsed(factory_data: &Self::FactoryData, a: Self::A, b: Self::B) -> Self;
+    /// Regularise the error returned while parsing the first element.
     fn from_error_a(
         factory_data: &Self::FactoryData,
         error: <Self::FA as Factory<'a, Ctx>>::ParseError,
     ) -> Self::ParseError;
+    /// Regularise the error returned while parsing the second element.
     fn from_error_b(
         factory_data: &Self::FactoryData,
         error: <Self::FB as Factory<'a, Ctx>>::ParseError,
     ) -> Self::ParseError;
+    /// Derive factory data from the object data.
     fn factory_data(&self) -> Self::FactoryData;
-    fn elements(&self) -> (&Self::A, &Self::B);
 }
 
+/// Generic implementation of a [Mentionable] for [StaticPair]s.
 pub struct StaticPairObject<SP> {
     pair: SP,
 }
@@ -58,13 +85,14 @@ impl<SP> Deref for StaticPairObject<SP> {
     }
 }
 
+/// Generic implementation of a [Factory] for [StaticPair]s.
 pub struct StaticPairFactory<'a, Ctx: 'a + Context, SP: StaticPair<'a, Ctx>> {
     factory_data: SP::FactoryData,
 }
 
 impl<SP: StaticPairSerializable> Serializable for StaticPairObject<SP> {
     fn serialize(&self, serializer: &mut dyn Serializer) {
-        let (a, b) = self.pair.s_elements();
+        let (a, b) = self.pair.elements();
         a.serialize(serializer);
         b.serialize(serializer);
     }
@@ -105,13 +133,14 @@ impl<'a, Ctx: 'a + Context, SP: StaticPair<'a, Ctx>> Factory<'a, Ctx>
         &self,
         deserializer: &mut dyn Deserializer,
         resolver: Rc<dyn Resolver<'a, Ctx>>,
+        addresses: &mut Addresses,
     ) -> ParseResult<'a, Ctx, Self> {
         let (fa, fb) = SP::factories(&self.factory_data);
-        let a: SP::A = match fa.deserialize(deserializer, resolver.clone()) {
+        let a: SP::A = match fa.deserialize(deserializer, resolver.clone(), addresses) {
             Ok(a) => a,
             Err(error) => return Err(SP::from_error_a(&self.factory_data, error)),
         };
-        let b: SP::B = match fb.deserialize(deserializer, resolver) {
+        let b: SP::B = match fb.deserialize(deserializer, resolver, addresses) {
             Ok(b) => b,
             Err(error) => return Err(SP::from_error_b(&self.factory_data, error)),
         };

src/std/nullable.rs

@@ -67,8 +67,8 @@ impl<'a, Ctx: 'a + Context, A: Mentionable<'a, Ctx>> Factory<'a, Ctx>
         &self,
         deserializer: &mut dyn Deserializer,
         resolver: std::rc::Rc<dyn Resolver<'a, Ctx>>,
+        addresses: &mut Addresses,
     ) -> ParseResult<'a, Ctx, Self> {
-        let mut addresses = Addresses::start();
         let factory = self.factory.clone();
         let address = addresses.next(deserializer)?;
         Ok(if address.point == HASH_ZEROS {