Struct ComposeAdapter 

pub struct ComposeAdapter<A: AstAdapter> { /* private fields */ }

Any adapter, with parseable leaf content grafted as subtrees.

Implementations

impl<A: AstAdapter> ComposeAdapter<A>

pub fn new(outer: A) -> Self

pub fn with_source_graft(self, graft: SourceGraft) -> Self

Choose the level source-file leaves graft at (builder-style; the default is the syntax level).

pub fn with_source_paths( outer: A, source_path: fn(&A, NodeId) -> Option<PathBuf>, ) -> Self

Like new, with a hook mapping outer leaves to filesystem paths, so archive leaves (.zip, .tar[.gz]) graft too. The grafted archive composes in turn: its own parseable entries graft, and one path walks filesystem → archive → document.

pub fn outer(&self) -> &A

The wrapped adapter (for outer-specific calls).

pub fn locator( &self, node: NodeId, outer_locator: impl Fn(NodeId) -> String, ) -> String

A combined locator: outer_locator(leaf)!inner-path for grafted nodes.

Trait Implementations

impl<A: AstAdapter> AstAdapter for ComposeAdapter<A>

fn aliased_metadata(&self, node: NodeId) -> &'static [&'static str]

A graft’s own aliases are not merged: a node either belongs to the outer document or to a graft, and the alias list is consulted only after the owning adapter’s property misses.

fn provenance(&self, node: NodeId) -> Provenance

A graft is a provenance layer: the grafted document’s own components win, and the outer leaf it was parsed from fills the rest (with an fs outer: the file’s path and mtime). The jar-style composite locator is deliberately not the source — ?src names a document, and the intra-document address is dpid’s job.

fn root(&self) -> NodeId

The root node — the initial navigation context.

fn children(&self, node: NodeId) -> Vec<NodeId>

The tree children of node, in document order.

fn name(&self, node: NodeId) -> Option<String>

The name of node — the label of its incoming tree edge.

fn parent(&self, node: NodeId) -> Option<NodeId>

The parent of node, or None for the root.

fn traits(&self, node: NodeId) -> Vec<String>

The traits of node — its adapter-defined classifications, used by <trait> navigation filters (e.g. a filesystem adapter’s <dir>, <code>, <image>).

fn property(&self, node: NodeId, name: &str) -> Option<Value>

A named property of node — ::prop. None if absent.

fn default_value(&self, node: NodeId) -> Option<Value>

The default projection of node — bare ::, adapter-specific (a filesystem adapter returns file content).

fn metadata(&self, node: NodeId, key: &str) -> Option<Value>

Adapter-defined metadata — ::::key (a filesystem adapter’s size, modified, permissions, …). None if absent.

fn resolve( &self, node: NodeId, property: &str, hint: Option<&str>, ) -> Option<NodeId>

Resolve a cross-reference: ::property~>hint maps node’s property (a value that references another node) to its target, with an optional adapter-specific relation hint. A JSON adapter resolves a $ref JSON Pointer; None if unresolvable.

fn links(&self, node: NodeId) -> Vec<(String, NodeId)>

Outgoing crosslinks from node, as (label, target) pairs, for -> navigation (a filesystem adapter’s symlinks).

fn backlinks(&self, node: NodeId) -> Vec<(String, NodeId)>

Incoming crosslinks to node, as (label, source) pairs, for <- navigation. May be expensive (an adapter that does not precompute edges must search for referrers).

fn link_property( &self, source: NodeId, label: &str, target: NodeId, name: &str, ) -> Option<Value>

A property of the crosslink source --label--> target — the $-::prop read. Adapters whose edges carry data (a property graph’s relationship properties) override this; None if the edge is bare or unknown. Where parallel edges share source, label, and target, the adapter answers for one of them, consistently.

fn children_named(&self, node: NodeId, name: &str) -> Vec<NodeId>

The children of node whose edge name is exactly name — the engine’s fast path for name-matcher child hops. The default filters children; an adapter whose containers cannot be enumerated (permission-scoped or unbounded remote trees) overrides this with a direct, name-addressed lookup. Must be observationally identical to the default wherever enumeration works. The adapter owns the name test: it may deliberately alias — resolve a name to a node whose edge name differs (git revision syntax landing on a hash-named commit) — and the engine will not re-filter. Container-scoped resolution like that stays child-axis only; per-node spelling aliases belong in answers_to, which this default consults.

fn answers_to(&self, node: NodeId, name: &str) -> bool

Whether node answers to name as a literal spelling (ruling #30). The default is canonical equality. An adapter may declare per-node aliases — a social feed spelling a handle @alice while the stripped alice is the hop name — and the engine consults this wherever a literal name is matched, on every axis, so one override keeps /@alice and //@alice in agreement. :::name stays canonical (locators and reflection print it; an alias is a way in, never a way out), and name patterns (~(...), *) test the canonical name only.

fn quantifier_bound(&self) -> usize

The quantifier bound N_max: the depth to which open-ended path quantifiers (+, *, {m,}) expand, and the ceiling of any explicit {m,n} (the effective upper bound is min(n, N_max)). An adapter whose natural structures run deep may raise it; the CLI overrides it per run (qua --quantifier-bound).

fn allow_shell(&self) -> bool

Whether the sh(...) pipeline stage may run external commands. False by default — query text stays inert data — and enabled per run by the CLI (qua --allow-shell) through the AllowShell wrapper.

fn invocation_instant(&self) -> Option<(i64, u32)>

The invocation instant now() denotes (spec: The Temporal Fragment, Determinism): one UTC timeline point bound by the runner BEFORE evaluation begins — evaluation itself never reads a clock. None by default (a library run is fully deterministic; now() reads as null); the CLI binds it at startup — pinnable with qua --now — through the WithNow wrapper.

fn unit_scale(&self, expr: &str) -> Option<(f64, String)>

The scale of a unit expression — (factor, canonical SI-base expansion) — for the unital reading’s criterion text (spec: The Quantital Fragment). The default answers from the engine’s frozen built-in table; a unit-aware adapter (kaiv) overrides it to include the mounted document’s own custom units, so [::range < '50kellicam'] resolves through the document’s .!units imports.