Function saveNameToExportMap

packages/core/src/render3/view/directives.ts:534–547

* Builds up an export map as directives are created, so local refs can be quickly mapped * to their directive instances.

(
  directiveIdx: number,
  def: DirectiveDef<any> | ComponentDef<any>,
  exportsMap: {[key: string]: number} | null,
)

 * to their directive instances.
 */
function saveNameToExportMap(
  directiveIdx: number,
  def: DirectiveDef<any> | ComponentDef<any>,
  exportsMap: {[key: string]: number} | null,
) {
  if (exportsMap) {
    if (def.exportAs) {
      for (let i = 0; i < def.exportAs.length; i++) {
        exportsMap[def.exportAs[i]] = directiveIdx;
      }
    }
    if (isComponentDef(def)) exportsMap[''] = directiveIdx;
  }
}

/**
 * Initializes the flags on the current node, setting all indices to the initial index,