Angular structural指令host element的定位调试

/**
 * Creates an LContainer for an ng-template (dynamically-inserted view), e.g.
 *
 * <ng-template #foo>
 *    <div></div>
 * </ng-template>
 *
 * \@codeGenApi
 * @param {?} index The index of the container in the data array
 * @param {?} templateFn Inline template
 * @param {?} decls The number of nodes, local refs, and pipes for this template
 * @param {?} vars The number of bindings for this template
 * @param {?=} tagName The name of the container element, if applicable
 * @param {?=} attrsIndex Index of template attributes in the `consts` array.
 * @param {?=} localRefsIndex
 * @param {?=} localRefExtractor A function which extracts local-refs values from the template.
 *        Defaults to the current element associated with the local-ref.
 *
 * @return {?}
 */
function ɵɵtemplate(index, templateFn, decls, vars, tagName, attrsIndex, localRefsIndex, localRefExtractor) {
    /** @type {?} */
    const lView = getLView();
    /** @type {?} */
    const tView = getTView();
    /** @type {?} */
    const adjustedIndex = index + HEADER_OFFSET;
    /** @type {?} */
    const tNode = tView.firstCreatePass ?
        templateFirstCreatePass(index, tView, lView, templateFn, decls, vars, tagName, attrsIndex, localRefsIndex) :
        (/** @type {?} */ (tView.data[adjustedIndex]));
    setPreviousOrParentTNode(tNode, false);
    /** @type {?} */
    const comment = lView[RENDERER].createComment(ngDevMode ? 'container' : '');
    appendChild(tView, lView, comment, tNode);
    attachPatchData(comment, lView);
    addToViewTree(lView, lView[adjustedIndex] = createLContainer(comment, lView, comment, tNode));
    if (isDirectiveHost(tNode)) {
        createDirectivesInstances(tView, lView, tNode);
    }
    if (localRefsIndex != null) {
        saveResolvedLocalsInData(lView, tNode, localRefExtractor);
    }
}