Method _popContainer

packages/compiler/src/ml_parser/parser.ts:610–639

* Closes the nearest element with the tag name `fullName` in the parse tree. * `endSourceSpan` is the span of the closing tag, or null if the element does * not have a closing tag (for example, this happens when an incomplete * opening tag is recovered).

(
    expectedName: string | null,
    expectedType: NodeContainerConstructor,
    endSourceSpan: ParseSourceSpan | null,
  )

   * opening tag is recovered).
   */
  private _popContainer(
    expectedName: string | null,
    expectedType: NodeContainerConstructor,
    endSourceSpan: ParseSourceSpan | null,
  ): boolean {
    let unexpectedCloseTagDetected = false;
    for (let stackIndex = this._containerStack.length - 1; stackIndex >= 0; stackIndex--) {
      const node = this._containerStack[stackIndex];
      const nodeName = node instanceof html.Component ? node.fullName : node.name;

      if ((nodeName === expectedName || expectedName === null) && node instanceof expectedType) {
        // Record the parse span with the element that is being closed. Any elements that are
        // removed from the element stack at this point are closed implicitly, so they won't get
        // an end source span (as there is no explicit closing element).
        node.endSourceSpan = endSourceSpan;
        node.sourceSpan.end = endSourceSpan !== null ? endSourceSpan.end : node.sourceSpan.end;
        this._containerStack.splice(stackIndex, this._containerStack.length - stackIndex);
        return !unexpectedCloseTagDetected;
      }

      // Blocks and most elements are not self closing.
      if (node instanceof html.Block || !this._getTagDefinition(node)?.closedByParent) {
        // Note that we encountered an unexpected close tag but continue processing the element
        // stack so we can assign an `endSourceSpan` if there is a corresponding start tag for this
        // end tag in the stack.
        unexpectedCloseTagDetected = true;
      }
    }
    return false;
  }

  private _consumeAttr(attrName: AttributeNameToken): html.Attribute {
    const fullName = mergeNsAndName(attrName.parts[0], attrName.parts[1]);