File: IntroRules.java

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import org.checkerframework.checker.index.qual.GTENegativeOne;
import org.checkerframework.checker.index.qual.LowerBoundUnknown;
import org.checkerframework.checker.index.qual.NonNegative;
import org.checkerframework.checker.index.qual.Positive;

public class IntroRules {

    void test() {
        @Positive int a = 10;
        @NonNegative int b = 9;
        @GTENegativeOne int c = 8;
        @LowerBoundUnknown int d = 7;

        // :: error: (assignment.type.incompatible)
        @Positive int e = 0;
        // :: error: (assignment.type.incompatible)
        @Positive int f = -1;
        // :: error: (assignment.type.incompatible)
        @Positive int g = -6;

        @NonNegative int h = 0;
        @GTENegativeOne int i = 0;
        @LowerBoundUnknown int j = 0;
        // :: error: (assignment.type.incompatible)
        @NonNegative int k = -1;
        // :: error: (assignment.type.incompatible)
        @NonNegative int l = -4;

        @GTENegativeOne int m = -1;
        @LowerBoundUnknown int n = -1;
        // :: error: (assignment.type.incompatible)
        @GTENegativeOne int o = -9;
    }
}
// a comment