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import java.util.HashMap;
import java.util.Map;
import org.checkerframework.checker.nullness.qual.EnsuresKeyFor;
import org.checkerframework.checker.nullness.qual.EnsuresKeyForIf;
import org.checkerframework.checker.nullness.qual.KeyFor;
class KeyForPostcondition {
public static Map<String, Integer> m = new HashMap<>();
// public static @KeyFor("m") String key = "hello";
public static boolean b;
@EnsuresKeyFor(value = "#1", map = "m")
public void putKey(String x) {
m.put(x, 22);
}
public void usePutKey(String x) {
// :: error: (assignment.type.incompatible)
@KeyFor("m") String a = x;
putKey(x);
@KeyFor("m") String b = x;
}
@EnsuresKeyForIf(expression = "#1", result = true, map = "m")
public boolean tryPutKey(String x) {
if (b) {
putKey(x);
return true;
} else {
return false;
}
}
public void useTryPutKey(String x) {
// :: error: (assignment.type.incompatible)
@KeyFor("m") String a = x;
if (tryPutKey(x)) {
@KeyFor("m") String b = x;
}
// :: error: (assignment.type.incompatible)
@KeyFor("m") String c = x;
}
}
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