framework/tests/value/Polymorphic2.java

import org.checkerframework.common.value.qual.*;

public class Polymorphic2 {
  public static boolean flag = false;

  @PolyValue int mergeValue(@PolyValue int a, @PolyValue int b) {
    return flag ? a : b;
  }

  int @PolyValue [] mergeValue(int @PolyValue [] a, int @PolyValue [] b) {
    return flag ? a : b;
  }

  void testMinLen(int @MinLen(2) [] a, int @MinLen(5) [] b) {
    int @MinLen(2) [] z = mergeValue(a, b);
    // :: error: (assignment)
    int @MinLen(5) [] zz = mergeValue(a, b);
  }

  void testArrayLen(int @ArrayLen(2) [] a, int @ArrayLen(5) [] b) {
    // :: error: (assignment)
    int @ArrayLen(2) [] z = mergeValue(a, b);
    // :: error: (assignment)
    int @ArrayLen(5) [] zz = mergeValue(a, b);

    int @ArrayLen({2, 5}) [] zzz = mergeValue(a, b);
  }

  void testIntVal(@IntVal(2) int a, @IntVal(5) int b) {
    // :: error: (assignment)
    @IntVal(2) int z = mergeValue(a, b);
    // :: error: (assignment)
    @IntVal(5) int zz = mergeValue(a, b);

    @IntVal({2, 5}) int zzz = mergeValue(a, b);
  }
}