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tamer: ir::xir::tree::Element: Open element constructor 

This simply moves the construction into `Element`.
main
Mike Gerwitz 2021-09-16 10:50:55 -04:00
parent ea50e1112a
commit 12daddcc2d
1 changed files with 18 additions and 6 deletions
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24
tamer/src/ir/xir/tree.rs
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@ -260,11 +260,28 @@ pub struct Element<Ix: SymbolIndexSize> {
}
impl<Ix: SymbolIndexSize> Element<Ix> {
/// Opens an element for incremental construction.
///
/// This is intended for use by the parser to begin building an element.
/// It does not represent a completed element and should not be yielded
/// to any outside caller until it is complete.
/// This incomplete state is encoded in [`State::BuddingElement`].
#[inline]
fn open(name: QName<Ix>, span: Span) -> Self {
Self {
name,
attrs: AttrList::new(),
children: vec![],
span: (span, span), // We do not yet know where the span will end
}
}
/// Complete an element's span by setting its ending span.
///
/// When elements are still budding (see [`Stack::BuddingElement`]),
/// the ending span is set to the starting span,
/// since the end is not yet known.
#[inline]
fn close_span(self, close_span: Span) -> Self {
Element {
span: (self.span.0, close_span),
@ -450,12 +467,7 @@ impl<Ix: SymbolIndexSize> Stack<Ix> {
///
/// Attempting to open an element in any other context is an error.
fn open_element(self, name: QName<Ix>, span: Span) -> Result<Self, Ix> {
let element = Element {
name,
attrs: AttrList::new(),
children: vec![],
span: (span, span), // We do not yet know where the span will end
};
let element = Element::open(name, span);
Ok(Self::BuddingElement(ElementStack {
element,