Review

9

/mubench/mubench.pipeline/../checkouts/closure/319/original-src/com/google/javascript/jscomp/VariableShadowDeclarationCheck.java

enterScope(NodeTraversal)

class VariableShadowDeclarationCheck.NoShadowAnnotationGatheringCallback {
    @Override
    public void enterScope(NodeTraversal t) {
      Scope scope = t.getScope();
      for (Iterator<Var> vars = scope.getVars(); vars.hasNext();) {
        Var var = vars.next();
        if (var.isNoShadow()) {
          externalNoShadowVariableNames.add(var.getName());
        }
      }
    }
}

class VariableShadowDeclarationCheck.ShadowDeclarationCheckingCallback {
    @Override
    public void enterScope(NodeTraversal t) {
      if (t.inGlobalScope()) {
        return;
      }

      Scope scope = t.getScope();
      Scope parentScope = scope.getParent();
      for (Iterator<Var> vars = scope.getVars(); vars.hasNext();) {
        Var var = vars.next();

        if (externalNoShadowVariableNames.contains(var.getName())) {
          compiler.report(
              t.makeError(var.nameNode, checkLevel,
                  SHADOW_VAR_ERROR, var.getName()));
          continue;
        }

        Var shadowedVar = parentScope.getVar(var.getName());
        if ((shadowedVar != null) &&
            (shadowedVar.isNoShadow() || shadowedVar.isLocal())) {
          compiler.report(
              t.makeError(var.nameNode, checkLevel,
                  SHADOW_VAR_ERROR, var.getName()));
          continue;
        }
      }
    }

}