Ejemplo n.º 1
0
 /**
  * @param function
  * @return the Definition object for the function.
  */
 private Definition getFunctionDefinition(Node function) {
   DefinitionSite definitionSite = defFinder.getDefinitionForFunction(function);
   Preconditions.checkNotNull(definitionSite);
   Definition definition = definitionSite.definition;
   Preconditions.checkState(!definitionSite.inExterns);
   Preconditions.checkState(definition.getRValue() == function);
   return definition;
 }
Ejemplo n.º 2
0
    /**
     * @return Whether the definitionSite represents a function whose call signature can be
     *     modified.
     */
    private boolean canChangeSignature(Node function) {
      Definition definition = getFunctionDefinition(function);
      CodingConvention convention = compiler.getCodingConvention();

      Preconditions.checkState(!definition.isExtern());

      Collection<UseSite> useSites = defFinder.getUseSites(definition);
      for (UseSite site : useSites) {
        Node parent = site.node.getParent();

        // This was a use site removed by something else before we run.
        // 1. By another pass before us which means the definition graph is
        //    no updated properly.
        // 2. By the continuations algorithm above.
        if (parent == null) {
          continue; // Ignore it.
        }

        // Ignore references within goog.inherits calls.
        if (NodeUtil.isCall(parent) && convention.getClassesDefinedByCall(parent) != null) {
          continue;
        }

        // Accessing the property directly prevents rewrite.
        if (!SimpleDefinitionFinder.isCallOrNewSite(site)) {
          if (!(NodeUtil.isGetProp(parent) && NodeUtil.isFunctionObjectCall(parent.getParent()))) {
            return false;
          }
        }

        if (NodeUtil.isFunctionObjectApply(parent)) {
          return false;
        }

        // TODO(johnlenz): support specialization

        // Multiple definitions prevent rewrite.
        // Attempt to validate the state of the simple definition finder.
        Node nameNode = site.node;
        Collection<Definition> singleSiteDefinitions =
            defFinder.getDefinitionsReferencedAt(nameNode);
        Preconditions.checkState(singleSiteDefinitions.size() == 1);
        Preconditions.checkState(singleSiteDefinitions.contains(definition));
      }

      return true;
    }