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feat: Split methods between HugrMut and HugrMutInternals #441

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merged 12 commits into from
Aug 29, 2023

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Splits the mutable methods between HugrMutInternals & HugrMut.

When implemented by a (future) non-AsMut<Hugr>, the default impl checks whether the related nodes are valid in the view before calling the internal hugrs mutable primitives.

Other small changes:

  • Moved canonicalize_nodes from HugrMut to Hugr, since it doesn't make sense to call in on a view.
  • Added a root parameter to Hugr::canonical_order so we can get the canonical order for regions.
  • Added an assert to validate the root type when querying a hugrview
  • Add a lifetime to HugrInternals::Portgraph so the views can return clones instead of double references.
    I had to roll it back due to the convex check requiring Copy on the portgraph view.

aborgna-q and others added 5 commits August 21, 2023 23:18
- split methods between HugrMutInternals & HugrMut
- Add a hierarchy root to `Hugr::canonical_order`
- check the root type when querying a hugrview
- Add a lifetime to `HugrInternals::Portgraph`
  so the views can return clones instead of double references.
It clashes with the new convexCheck in portgraph since it
requires `Copy` on the LinkView :/
co-authored-by: Seyon Sivarajah <seyon.sivarajah@quantinuum.com>
@aborgna-q aborgna-q requested a review from ss2165 August 22, 2023 15:00
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I'll re-add the rolled-back lifetime parameters in HugrViewInternals::Portgraph once the fix is released on portgraph.
CQCL/portgraph#104

src/hugr.rs Show resolved Hide resolved
src/hugr/hugrmut.rs Outdated Show resolved Hide resolved
fn root(&self) -> Node;
/// Return the root node of this view.
#[inline]
fn root(&self) -> Node {
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This is just a way of exposing the hidden-in-HugrInternals root_node, right?
(Might one call that root too and then do (self as HugrInternals).root() here?)

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Yeah, I don't seriously suggest that, think I've got it now

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The different name is to avoid ambiguity at local call sites. Users shouldn't see the HugrMutInternals, so there shouldn't be any confusion.

@@ -340,6 +384,12 @@ pub enum HugrError {
/// An error occurred while manipulating the hierarchy.
#[error("An error occurred while manipulating the hierarchy.")]
HierarchyError(#[from] portgraph::hierarchy::AttachError),
/// The node doesn't exist.
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I wonder about the utility of naming the single field within, but not too worried

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I prefer to use named fields when the order is not relevant (what does x.0 mean?). But I have no strong opinion on this.

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If there are multiple fields of the same type (e.g. expected and actual) then very much agree that named fields is the way to go. But here I don't think the name adds anything beyond what the type says already, and I really can't think of much else (of any type) you could put in an InvalidNode... (a validity-reason, perhaps. So ok if you prefer it this way!)

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I changed it into a tuple struct for consistency with the other errors.

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acl-cqc commented Aug 23, 2023

I'd also mention in the description - remove add_node and add_op (keeping only the variants thereof that specify a position in the hierarchy) - I think that's quite significant

src/hugr/hugrmut.rs Outdated Show resolved Hide resolved
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Nice!! :)

@aborgna-q aborgna-q requested a review from acl-cqc August 24, 2023 09:33
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Nice! Like it, and think it does what I'm after, thanks @aborgna-q :-)

}

/// Add a node to the graph.
fn add_node(&mut self, nodetype: NodeType) -> Node {
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This is the only implementation of add_node, I wonder if it really belongs here or might be better as a method on Hugr itself?

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I thought for a moment that the same might be true for all of these HugrMutInternals methods, but no - add_node and add_op are the only ones that don't do (or aren't part of) a valid_xxx check, so I think that's a reasonable argument that they belong somewhere else.

*self.get_metadata_mut(node) = metadata;
/// Returns a [`HugrError::InvalidNode`] otherwise.
#[inline]
fn valid_node(&self, node: Node) -> Result<(), HugrError> {
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Agreed with the implementation; the naming here is rather tricky. I don't really have a better suggestion (I thought about valid_parent instead of valid_node and valid_sibling instead of valid_descendant, and I think this is better in some places - but worse in others, so not really any better overall). So ok!

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Hmmm, how about valid_non_root rather than valid_descendant? These mean pretty much the same thing, but descendant might be confusing in a flat view that has only children and nothing deeper? (And valid_non_root also describes quite well what the implementation actually checks...)

@@ -340,6 +384,12 @@ pub enum HugrError {
/// An error occurred while manipulating the hierarchy.
#[error("An error occurred while manipulating the hierarchy.")]
HierarchyError(#[from] portgraph::hierarchy::AttachError),
/// The node doesn't exist.
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If there are multiple fields of the same type (e.g. expected and actual) then very much agree that named fields is the way to go. But here I don't think the name adds anything beyond what the type says already, and I really can't think of much else (of any type) you could put in an InvalidNode... (a validity-reason, perhaps. So ok if you prefer it this way!)

@aborgna-q aborgna-q added this pull request to the merge queue Aug 29, 2023
Merged via the queue into main with commit 76402e3 Aug 29, 2023
6 checks passed
@aborgna-q aborgna-q deleted the feat/hugrmut-split branch August 29, 2023 09:32
@github-actions github-actions bot mentioned this pull request Jan 3, 2024
github-merge-queue bot pushed a commit that referenced this pull request Jan 15, 2024
## 🤖 New release
* `quantinuum-hugr`: 0.1.0

<details><summary><i><b>Changelog</b></i></summary><p>

<blockquote>

## 0.1.0 (2024-01-15)

### Bug Fixes

- Subgraph boundaries with copies
([#440](#440))
- [**breaking**] Use internal tag for SumType enum serialisation
([#462](#462))
- Check kind before unwrap in insert_identity
([#475](#475))
- Allow for variables to get solved in inference
([#478](#478))
- In IdentityInsertion add noop to correct parent
([#477](#477))
- Failing release tests ([#485](#485))
- [**breaking**] Serialise `Value`, `PrimValue`, and `TypeArg` with
internal tags ([#496](#496))
- Serialise custom constants with internal tag
([#502](#502))
- [**breaking**] Reduce max int width in arithmetic extension to 64
([#504](#504))
- HugrView::get_function_type
([#507](#507))
- TODO in resolve_extension_ops: copy across input_extensions
([#510](#510))
- Use given input extensions in `define_function`
([#524](#524))
- Lessen requirements for hugrs in outline_cfg
([#528](#528))
- Make unification logic less strict
([#538](#538))
- Simple replace incorrectly copying metadata
([#545](#545))
- Account for self-referencial constraints
([#551](#551))
- Consider shunted metas when comparing equality
([#555](#555))
- Join labels in issue workflow
([#563](#563))
- Comment out broken priority code
([#562](#562))
- Handling of issues with no priority label
([#573](#573))
- Don't insert temporary wires when extracting a subgraph
([#582](#582))
- Improve convexity checking and fix test
([#585](#585))
- Ignore input->output links in
SiblingSubgraph::try_new_dataflow_subgraph
([#589](#589))
- Enforce covariance of SiblingMut::RootHandle
([#594](#594))
- Erratic stack overflow in infer.rs (live_var)
([#638](#638))
- Work harder in variable instantiation
([#591](#591))
- Actually add the error type to prelude
([#672](#672))
- Serialise dynamically computed opaqueOp signatures
([#690](#690))
- FuncDefns don't require that their extensions match their children
([#688](#688))
- Binary compute_signature returning a PolyFuncType with binders
([#710](#710))
- Use correct number of args for int ops
([#723](#723))
- [**breaking**] Add serde tag to TypeParam enum
([#722](#722))
- Allow widening and narrowing to same width.
([#735](#735))
- Case node should not have an external signature
([#749](#749))
- [**breaking**] Normalize input/output value/static/other ports in
`OpType` ([#783](#783))
- No dataflow_signature for block types
([#792](#792))
- Ignore unsupported test in miri
([#794](#794))
- Include schema rather than read file
([#807](#807))

### Documentation

- Add operation constraint to quantum extension
([#543](#543))
- Coverage check section in DEVELOPMENT.md
([#648](#648))
- Remove "quantum extension" from HUGR spec.
([#694](#694))
- Improve crate-level docs, including example code.
([#698](#698))
- Spec cleanups and clarifications
([#742](#742))
- Spec clarifications ([#738](#738))
- Spec updates ([#741](#741))
- [spec] Remove references to causal cone and Order edges from Input
([#762](#762))
- Mention experimental inference in readme
([#800](#800))
- Collection of spec updates for 0.1
([#801](#801))
- Add schema v0 ([#805](#805))
- Update spec wrt. polymorphism
([#791](#791))

### Features

- Derive things for builder structs
([#229](#229))
- Return a slice of types from the signature
([#238](#238))
- Move `dot_string` to `HugrView`
([#271](#271))
- [**breaking**] Change `TypeParam::USize` to `TypeParam::BoundedNat`
and use in int extensions
([#445](#445))
- TKET2 compatibility requirements
([#450](#450))
- Split methods between `HugrMut` and `HugrMutInternals`
([#441](#441))
- Add `HugrView::node_connections` to get all links between nodes
([#460](#460))
- Location information in extension inference error
([#464](#464))
- Add T, Tdg, X gates ([#466](#466))
- [**breaking**] Add `ApplyResult` associated type to `Rewrite`
([#472](#472))
- Implement rewrite `IdentityInsertion`
([#474](#474))
- Instantiate inferred extensions
([#461](#461))
- Default DFG builders to open extension sets
([#473](#473))
- Some helper methods ([#482](#482))
- Extension inference for conditional nodes
([#465](#465))
- Add ConvexChecker ([#487](#487))
- Add clippy lint for mut calls in a debug_assert
([#488](#488))
- Default more builder methods to open extension sets
([#492](#492))
- Port is serializable ([#489](#489))
- More general portgraph references
([#494](#494))
- Add extension deltas to CFG ops
([#503](#503))
- Implement petgraph traits on Hugr
([#498](#498))
- Make extension delta a parameter of CFG builders
([#514](#514))
- [**breaking**] SiblingSubgraph does not borrow Hugr
([#515](#515))
- Validate TypeArgs to ExtensionOp
([#509](#509))
- Derive Debug & Clone for `ExtensionRegistry`.
([#530](#530))
- Const nodes are built with some extension requirements
([#527](#527))
- Some python errors and bindings
([#533](#533))
- Insert_hugr/insert_view return node map
([#535](#535))
- Add `SiblingSubgraph::try_from_nodes_with_checker`
([#547](#547))
- PortIndex trait for undirected port parameters
([#553](#553))
- Insert/extract subgraphs from a HugrView
([#552](#552))
- Add `new_array` operation to prelude
([#544](#544))
- Add a `DataflowParentID` node handle
([#559](#559))
- Make TypeEnum and it's contents public
([#558](#558))
- Optional direction check when querying a port index
([#566](#566))
- Extension inference for CFGs
([#529](#529))
- Better subgraph verification errors
([#587](#587))
- Compute affected nodes for `SimpleReplacement`
([#600](#600))
- Move `SimpleReplace::invalidation_set` to the `Rewrite` trait
([#602](#602))
- [**breaking**] Resolve extension ops (mutating Hugr) in
(infer_and_->)update_validate
([#603](#603))
- Add accessors for node index and const values
([#605](#605))
- [**breaking**] Expose the value of ConstUsize
([#621](#621))
- Nicer debug and display for core types
([#628](#628))
- [**breaking**] Static checking of Port direction
([#614](#614))
- Builder and HugrMut add_op_xxx default to open extensions
([#622](#622))
- [**breaking**] Add panicking integer division ops
([#625](#625))
- Add hashable `Angle` type to Quantum extension
([#608](#608))
- [**breaking**] Remove "rotations" extension.
([#645](#645))
- Port.as_directed to match on either direction
([#647](#647))
- Impl GraphRef for PetgraphWrapper
([#651](#651))
- Provide+implement Replace API
([#613](#613))
- Require the node's metadata to always be a Map
([#661](#661))
- [**breaking**] Polymorphic function types (inc OpDefs) using dyn trait
([#630](#630))
- Make prelude error type public
([#669](#669))
- Shorthand for retrieving custom constants from `Const`, `Value`
([#679](#679))
- [**breaking**] HugrView API improvements
([#680](#680))
- Make FuncDecl/FuncDefn polymorphic
([#692](#692))
- [**breaking**] Simplify `SignatureFunc` and add custom arg validation.
([#706](#706))
- [**breaking**] Drop the `pyo3` feature
([#717](#717))
- [**breaking**] `OpEnum` trait for common opdef functionality
([#721](#721))
- MakeRegisteredOp trait for easier registration
([#726](#726))
- Getter for `PolyFuncType::body`
([#727](#727))
- `Into<OpType>` for custom ops
([#731](#731))
- Always require a signature in `OpaqueOp`
([#732](#732))
- Values (and hence Consts) know their extensions
([#733](#733))
- [**breaking**] Use ConvexChecker trait
([#740](#740))
- Custom const for ERROR_TYPE
([#756](#756))
- Implement RemoveConst and RemoveConstIgnore
([#757](#757))
- Constant folding implemented for core and float extension
([#769](#769))
- Constant folding for arithmetic conversion operations
([#720](#720))
- DataflowParent trait for getting inner signatures
([#782](#782))
- Constant folding for logic extension
([#793](#793))
- Constant folding for list operations
([#795](#795))
- Add panic op to prelude
([#802](#802))
- Const::from_bool function
([#803](#803))

### HugrMut

- Validate nodes for set_metadata/get_metadata_mut, too
([#531](#531))

### HugrView

- Validate nodes, and remove Base
([#523](#523))

### Miscellaneous Tasks

- [**breaking**] Update portgraph 0.10 and pyo3 0.20
([#612](#612))
- [**breaking**] Hike MSRV to 1.75
([#761](#761))

### Performance

- Use lazy static definittion for prelude registry
([#481](#481))

### Refactor

- Move `rewrite` inside `hugr`, `Rewrite` -> `Replace` implementing new
'Rewrite' trait ([#119](#119))
- Use an excluded upper bound instead of max log width.
([#451](#451))
- Add extension info to `Conditional` and `Case`
([#463](#463))
- `ExtensionSolution` only consists of input extensions
([#480](#480))
- Remove builder from more DFG tests
([#490](#490))
- Separate hierarchy views
([#500](#500))
- [**breaking**] Use named struct for float constants
([#505](#505))
- Allow NodeType::new to take any Into<Option<ExtensionSet>>
([#511](#511))
- Move apply_rewrite from Hugr to HugrMut
([#519](#519))
- Use SiblingSubgraph in SimpleReplacement
([#517](#517))
- CFG takes a FunctionType
([#532](#532))
- Remove check_custom_impl by inlining into check_custom
([#604](#604))
- Insert_subgraph just return HashMap, make InsertionResult new_root
compulsory ([#609](#609))
- [**breaking**] Rename predicate to TupleSum/UnitSum
([#557](#557))
- Simplify infer.rs/report_mismatch using early return
([#615](#615))
- Move the core types to their own module
([#627](#627))
- Change &NodeType->&OpType conversion into op() accessor
([#623](#623))
- Infer.rs 'fn results' ([#631](#631))
- Be safe ([#637](#637))
- NodeType constructors, adding new_auto
([#635](#635))
- Constraint::Plus stores an ExtensionSet, which is a BTreeSet
([#636](#636))
- [**breaking**] Remove `SignatureDescription`
([#644](#644))
- [**breaking**] Remove add_op_<posn> by generalizing add_node_<posn>
with "impl Into" ([#642](#642))
- Rename accidentally-changed Extension::add_node_xxx back to add_op
([#659](#659))
- [**breaking**] Remove quantum extension
([#670](#670))
- Use type schemes in extension definitions wherever possible
([#678](#678))
- [**breaking**] Flatten `Prim(Type/Value)` in to parent enum
([#685](#685))
- [**breaking**] Rename `new_linear()` to `new_endo()`.
([#697](#697))
- Replace NodeType::signature() with io_extensions()
([#700](#700))
- Validate ExtensionRegistry when built, not as we build it
([#701](#701))
- [**breaking**] One way to add_op to extension
([#704](#704))
- Remove Signature struct
([#714](#714))
- Use `MakeOpDef` for int_ops
([#724](#724))
- [**breaking**] Use enum op traits for floats + conversions
([#755](#755))
- Avoid dynamic dispatch for non-folding operations
([#770](#770))
- Simplify removeconstignore verify
([#768](#768))
- [**breaking**] Unwrap BasicBlock enum
([#781](#781))
- Make clear const folding only for leaf ops
([#785](#785))
- [**breaking**] `s/RemoveConstIgnore/RemoveLoadConstant`
([#789](#789))
- Put extension inference behind a feature gate
([#786](#786))

### SerSimpleType

- Use Vec not TypeRow ([#381](#381))

### SimpleReplace+OutlineCfg

- Use HugrMut methods rather than .hierarchy/.graph
([#280](#280))

### Testing

- Update inference test to not use DFG builder
([#550](#550))
- Strengthen "failing_sccs_test", rename to "sccs" as it's not failing!
([#660](#660))
- [**breaking**] Improve coverage in signature and validate
([#643](#643))
- Use insta snapshots to add dot_string coverage
([#682](#682))
- Miri ignore file-opening test
([#684](#684))
- Unify the serialisation tests
([#730](#730))
- Add schema validation to roundtrips
([#806](#806))

### `ConstValue

- :F64` and `OpaqueOp::new`
([#206](#206))

### Cleanup

- Remove outdated comment
([#536](#536))

### Cosmetic

- Format + remove stray TODO
([#444](#444))

### Doc

- Crate name as README title + add reexport
([#199](#199))

### S/EdgeKind

- :Const/EdgeKind::Static/
([#201](#201))

### Simple_replace.rs

- Use HugrMut::remove_node, includes clearing op_types
([#242](#242))

### Spec

- Remove "Draft 3" from title of spec document.
([#590](#590))
- Rephrase confusing paragraph about TailLoop inputs/outputs
([#567](#567))

### Src/ops/validate.rs

- Common-up some type row calculations
([#254](#254))
</blockquote>


</p></details>

---
This PR was generated with
[release-plz](https://github.com/MarcoIeni/release-plz/).

---------

Signed-off-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Agustín Borgna <121866228+aborgna-q@users.noreply.github.com>
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