File: MethodInvocation.java

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import org.checkerframework.checker.interning.qual.*;

public class MethodInvocation {
    @Interned MethodInvocation interned;
    MethodInvocation nonInterned;

    void nonInternedMethod() {
        nonInternedMethod();
        // :: error: (method.invocation.invalid)
        internedMethod(); // should emit error

        this.nonInternedMethod();
        // :: error: (method.invocation.invalid)
        this.internedMethod(); // should emit error

        interned.nonInternedMethod();
        interned.internedMethod();

        nonInterned.nonInternedMethod();
        // :: error: (method.invocation.invalid)
        nonInterned.internedMethod(); // should emit error
    }

    void internedMethod(@Interned MethodInvocation this) {
        nonInternedMethod();
        internedMethod();

        this.nonInternedMethod();
        this.internedMethod();

        interned.nonInternedMethod();
        interned.internedMethod();

        nonInterned.nonInternedMethod();
        // :: error: (method.invocation.invalid)
        nonInterned.internedMethod(); // should emit error
    }

    // Now, test method parameters
    void internedCharacterParameter(@Interned Character a) {}

    // See https://github.com/typetools/checker-framework/issues/84
    void internedCharacterParametersClient() {
        // TODO: autoboxing from char to Character // :: error: (argument.type.incompatible)
        internedCharacterParameter('\u00E4'); // lowercase a with umlaut
        // TODO: autoboxing from char to Character // :: error: (argument.type.incompatible)
        internedCharacterParameter('a');
        // :: error: (argument.type.incompatible)
        internedCharacterParameter(Character.valueOf('a'));
        // :: error: (argument.type.incompatible)
        internedCharacterParameter(Character.valueOf('a'));
    }
}