text: /* @flow */
  
  import { toNumber, toString, looseEqual, looseIndexOf } from "shared/util";
  import { createTextVNode, createEmptyVNode } from "core/vdom/vnode";
  import { renderList } from "./render-list";
  import { renderSlot } from "./render-slot";
  import { resolveFilter } from "./resolve-filter";
  import { checkKeyCodes } from "./check-keycodes";
  import { bindObjectProps } from "./bind-object-props";
  import { renderStatic, markOnce } from "./render-static";
  import { bindObjectListeners } from "./bind-object-listeners";
  import { resolveScopedSlots } from "./resolve-scoped-slots";
  import { bindDynamicKeys, prependModifier } from "./bind-dynamic-keys";
  
  // target是组件实例
  export function installRenderHelpers(target: any) {
    target._o = markOnce;
    target._n = toNumber;
    target._s = toString;
    target._l = renderList;
    target._t = renderSlot;
    target._q = looseEqual;
    target._i = looseIndexOf;
    target._m = renderStatic;
    target._f = resolveFilter;
    target._k = checkKeyCodes;
    target._b = bindObjectProps;
    target._v = createTextVNode;
    target._e = createEmptyVNode;
    target._u = resolveScopedSlots;
    target._g = bindObjectListeners;
    target._d = bindDynamicKeys;
    target._p = prependModifier;
  }
  