Struct StaticContext 

pub struct StaticContext {
    pub xpath_2_0: bool,
    pub xpath_3_0: bool,
    pub libxml2_compatible: bool,
    pub current_node: Option<NodeId>,
}

The static evaluation context (XPath 2.0 §2.1.1) — the config that is fixed for the whole evaluation and travels by reference so it can’t be lost or duplicated. Holds exactly the knobs that don’t vary within an evaluation; genuinely dynamic state (context item, position, the [xsl:]default-collation that nests via Expr::WithDefaultCollation) lives elsewhere.

Carried on EvalCtx; a nested context (for body, predicate) copies the same &StaticContext, so a value set once at the top is seen everywhere — unlike the old per-method XPathBindings config, which a binding wrapper could silently reset to its default.

Fields

xpath_2_0: bool

XPath 2.0+ host — selects xs:integer/decimal literal typing and the F&O scientific double→string form.

xpath_3_0: bool

XPath 3.0+ host — gates 3.0-only function signatures (e.g. the 2-argument fn:round($arg, $precision) form) that are a static error in a 2.0 context.

libxml2_compatible: bool

libxml2-compat mode — where the spec and libxml2 historically diverge (number('-'), large-magnitude number formatting, …).

current_node: Option<NodeId>

The node the XSLT current() function returns: the context node of the whole top-level expression, fixed for the evaluation. Unlike EvalCtx::context_node it does NOT change as evaluation descends into location steps and predicates — so current() inside a nested predicate (foo[@x=current()/@y], as ISO Schematron’s phase selection uses) resolves to the instruction’s current node rather than the predicate’s context.

None means “no fixed current node was threaded” — current() then falls back to the live context node (the historical behaviour, correct outside nested predicates). Hosts that know the instruction’s current node (the libxml2 ABI shim) set Some.

Implementations

impl StaticContext

pub fn num_style(&self) -> NumStyle

Number-serialization style implied by the static context.

Trait Implementations

impl Clone for StaticContext

fn clone(&self) -> StaticContext

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for StaticContext

impl Debug for StaticContext

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for StaticContext

fn default() -> Self

Strict XPath 1.0 — the conservative default for a bare context.