/*

 * @test /nodynamiccopyright/

 * @bug 8206986

 * @summary Check types inferred for switch expressions.

 */

import java.util.ArrayList;

import java.util.List;

public class ExpressionSwitchInfer {

    private static final String NULL = "null";

    private <T> T test(List<T> l, Class<T> c, String param) {

        test(param == NULL ? new ArrayList<>() : new ArrayList<>(), CharSequence.class, param).charAt(0);

        test(param == NULL ? new ArrayList<>() : new ArrayList<>(), CharSequence.class, param).substring(0);

        test(switch (param) {

            case NULL -> new ArrayList<>();

            default -> new ArrayList<>();

        }, CharSequence.class, param).charAt(0);

        test(switch (param) {

            case NULL -> new ArrayList<>();

            default -> new ArrayList<>();

        }, CharSequence.class, param).substring(0);

        String str = switch (param) {

            case "" -> {

                yield 0;

            } default ->"default";

        };

        return null;

    }

}