checker/tests/nullness/init/InstanceOf.java

// Test case for pull request 735
// https://github.com/typetools/checker-framework/pull/735

import org.checkerframework.checker.initialization.qual.UnknownInitialization;

class PptTopLevel {
  class Ppt {
    Object method() {
      return "";
    }
  }

  class OtherPpt extends Ppt {}
}

public class InstanceOf {
  void foo(PptTopLevel.@UnknownInitialization(PptTopLevel.class) Ppt ppt) {
    // :: error: (method.invocation)
    ppt.method();
    if (ppt instanceof PptTopLevel.OtherPpt) {
      PptTopLevel.OtherPpt pslice = (PptTopLevel.OtherPpt) ppt;
      // :: error: (method.invocation)
      String samp_str = " s" + pslice.method();
    }
  }
}