package org.checkerframework.framework.util.typeinference.constraint;

import org.checkerframework.framework.type.AnnotatedTypeMirror;
import org.checkerframework.framework.type.AnnotatedTypeMirror.AnnotatedTypeVariable;

/**
 * A constraint of the form: A 《 F or F 》 A
 *
 * @see org.checkerframework.framework.util.typeinference.constraint.AFConstraint
 */
public class A2F extends AFConstraint {

  /** Create a constraint with an argument less than a formal. */
  public A2F(AnnotatedTypeMirror argument, AnnotatedTypeMirror formalParameter) {
    super(argument, formalParameter);
  }

  @Override
  public TUConstraint toTUConstraint() {
    return new TSuperU((AnnotatedTypeVariable) formalParameter, argument, true);
  }

  @Override
  protected A2F construct(AnnotatedTypeMirror newArgument, AnnotatedTypeMirror newFormalParameter) {
    return new A2F(newArgument, newFormalParameter);
  }

  @Override
  public String toString() {
    return "A2F( " + argument + " << " + formalParameter + " )";
  }
}