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package lessthan;
import org.checkerframework.checker.index.qual.IndexFor;
import org.checkerframework.checker.index.qual.LessThan;
import org.checkerframework.checker.index.qual.NonNegative;
import org.checkerframework.checker.index.qual.Positive;
import org.checkerframework.common.value.qual.*;
// Test for LessThanChecker
public class LessThanValue {
void subtyping(int x, int y, @LessThan({"#1", "#2"}) int a, @LessThan("#1") int b) {
@LessThan("x") int q = a;
@LessThan({"x", "y"})
// :: error: (assignment.type.incompatible)
int r = b;
}
public static boolean flag;
void lub(int x, int y, @LessThan({"#1", "#2"}) int a, @LessThan("#1") int b) {
@LessThan("x") int r = flag ? a : b;
@LessThan({"x", "y"})
// :: error: (assignment.type.incompatible)
int s = flag ? a : b;
}
void transitive(int a, int b, int c) {
if (a < b) {
if (b < c) {
@LessThan("c") int x = a;
}
}
}
void calls() {
isLessThan(0, 1);
isLessThanOrEqual(0, 0);
}
void isLessThan(@LessThan("#2") @NonNegative int start, int end) {
@NonNegative int x = end - start - 1;
@Positive int y = end - start;
}
@NonNegative int isLessThanOrEqual(@LessThan("#2 + 1") @NonNegative int start, int end) {
return end - start;
}
public void setMaximumItemCount(int maximum) {
if (maximum < 0) {
throw new IllegalArgumentException("Negative 'maximum' argument.");
}
int count = getCount();
if (count > maximum) {
@Positive int y = count - maximum;
@NonNegative int deleteIndex = count - maximum - 1;
}
}
int getCount() {
throw new RuntimeException();
}
void method(@NonNegative int m) {
boolean[] has_modulus = new boolean[m];
@LessThan("m") int x = foo(m);
@IndexFor("has_modulus") int rem = foo(m);
}
@LessThan("#1") @NonNegative int foo(int in) {
throw new RuntimeException();
}
void test(int maximum, int count) {
if (maximum < 0) {
throw new IllegalArgumentException("Negative 'maximum' argument.");
}
if (count > maximum) {
int deleteIndex = count - maximum - 1;
// TODO: shouldn't error
// :: error: (argument.type.incompatible)
isLessThanOrEqual(0, deleteIndex);
}
}
void count(int count) {
if (count > 0) {
if (count % 2 == 1) {
} else {
// TODO: improve value checker
// :: error: (assignment.type.incompatible)
@IntRange(from = 0) int countDivMinus = count / 2 - 1;
// Reasign to update the value in the store.
countDivMinus = countDivMinus;
// :: error: (argument.type.incompatible)
isLessThan(0, countDivMinus);
isLessThanOrEqual(0, countDivMinus);
}
}
}
static @NonNegative @LessThan("#2 + 1") int expandedCapacity(
@NonNegative int oldCapacity, @NonNegative int minCapacity) {
if (minCapacity < 0) {
throw new AssertionError("cannot store more than MAX_VALUE elements");
}
// careful of overflow!
int newCapacity = oldCapacity + (oldCapacity >> 1) + 1; // expand by %50
if (newCapacity < minCapacity) {
newCapacity = Integer.highestOneBit(minCapacity - 1) << 1;
}
if (newCapacity < 0) {
newCapacity = Integer.MAX_VALUE;
// guaranteed to be >= newCapacity
}
return newCapacity;
}
}
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