checker/tests/nullness/Issue415.java

// Test case for Issue 415
// https://github.com/typetools/checker-framework/issues/415

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import org.checkerframework.checker.nullness.qual.*;
import org.checkerframework.dataflow.qual.*;

public final class Issue415 {

  Map<String, Integer> mymap = new HashMap<>();
  // :: error: (expression.unparsable)
  public static void usesField(Set<@KeyFor("this.mymap") String> keySet) {
    // :: error: (expression.unparsable)
    new ArrayList<@KeyFor("this.mymap") String>(keySet);
  }

  public static void usesParameter(Map<String, Integer> m, Set<@KeyFor("#1") String> keySet) {
    new ArrayList<@KeyFor("#1") String>(keySet);
  }

  public static void sortedKeySet1(Map<String, Integer> m, Set<@KeyFor("#1") String> keySet) {
    new ArrayList<@KeyFor("#1") String>(keySet);
  }

  public static void sortedKeySet2(Map<String, Integer> m) {
    Set<@KeyFor("#1") String> keySet = m.keySet();
  }

  public static void sortedKeySet3(Map<String, Integer> m) {
    Set<@KeyFor("#1") String> keySet = m.keySet();
    new ArrayList<@KeyFor("#1") String>(keySet);
  }

  public static void sortedKeySet4(Map<String, Integer> m) {
    new ArrayList<@KeyFor("#1") String>(m.keySet());
  }

  public static <K extends Comparable<? super K>, V> void sortedKeySet(Map<K, V> m) {
    new ArrayList<@KeyFor("#1") K>(m.keySet());
  }
}