Struct NullLoader 

pub struct NullLoader;

Null loader — every load fails. Used as the default when no loader was supplied and the stylesheet doesn’t actually need resolution (i.e. has no xsl:import / xsl:include).

Trait Implementations

impl Clone for NullLoader

fn clone(&self) -> NullLoader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for NullLoader

impl Debug for NullLoader

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

Formats the value using the given formatter.

impl Default for NullLoader

fn default() -> NullLoader

Returns the “default value” for a type.

impl Loader for NullLoader

fn load(&self, href: &str, _base: Option<&str>) -> Result<String, XsltError>

Load href’s contents. Returns the raw source as a UTF-8 string. Implementations should resolve href against base when href is relative.

fn load_parsed( &self, href: &str, base: Option<&str>, ) -> Result<Arc<Document>, XsltError>

Load href’s contents and return them as a parsed sup_xml_tree::dom::Document. Default implementation calls Self::load and parses fresh each time; loaders that expect repeated lookups for the same URI (filesystem, in-memory) should override to cache the parse result internally so the runtime doc() path doesn’t re-parse the same XML thousands of times across an apply sweep.

fn resolve(&self, href: &str, base: Option<&str>) -> Result<String, XsltError>

Compute the base URI to use for files imported FROM the resource at href. Default: returns href itself (used as the base for the next level of resolution).

fn enumerate(&self, base: Option<&str>) -> Vec<String>

Enumerate every URI the loader can serve. Returned as hrefs that, when passed to Self::load with the same base, succeed. Called by the XSLT runtime when the stylesheet uses a dynamic document() / doc() URI (computed via concat / variables / @attr) — every enumerated URI is speculatively pre-loaded so that the runtime call can resolve against the pre-loaded map.