Reader Namespaces at the current level

[jose-pr]

I would like to suggest two functions be added to the reader

• Add a function to resolve a prefix to a namespace, currently you need a qname (prefix+":"+name)
• Add a function to get an iterator or vec of all the current namespaces, returning (ns_prefix, ns_uri)

[tafia]

Would you mind writing a PR?

[wt]

I'm curious. Is the mapping of the namespace alias to the canonical URI stored anywhere currently? If so, does that storage method allow reassigning aliases in child levels?

[Mingun]

Is the mapping of the namespace alias to the canonical URI stored anywhere currently?

Yes, of course:

quick-xml/src/reader/ns_reader.rs

Lines 27 to 28 in add7406

	/// A buffer to manage namespaces
	ns_resolver: NamespaceResolver,

If so, does that storage method allow reassigning aliases in child levels?

Yes, see the implementation of this struct:

quick-xml/src/name.rs

Lines 390 to 400 in add7406

	/// A namespace management buffer.
	///
	/// Holds all internal logic to push/pop namespaces with their levels.
	#[derive(Debug, Default, Clone)]
	pub(crate) struct NamespaceResolver {
	/// A stack of namespace bindings to prefixes that currently in scope
	bindings: Vec<NamespaceEntry>,
	/// The number of open tags at the moment. We need to keep track of this to know which namespace
	/// declarations to remove when we encounter an `End` event.
	nesting_level: i32,
	}