import testlib.util.*;

public class StringPatternsUsage {

    void requiresA(@PatternA String arg) {}

    void requiresB(@PatternB String arg) {}

    void requiresC(@PatternC String arg) {}

    void requiresAB(@PatternAB String arg) {}

    void requiresBC(@PatternBC String arg) {}

    void requiresAC(@PatternAC String arg) {}

    void requiresAny(String arg) {}

    void m() {

        String a = "A";
        String b = "B";
        String c = "C";
        String d = "D";
        String e = "";

        // This should produce the following diagnostic:
        // :-1: other: error: Bug in @ImplicitFor(stringpatterns=...) in type hierarchy definition:
        // inferred type for "A" is [@PatternBottomPartial] which is a subtype of [@PatternBC] but
        // its pattern does not match the string.  matches = [[@PatternAC], [@PatternAB]];
        // nonMatches = [[@PatternBC]]

        requiresA(a);
    }
}