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import org.checkerframework.common.subtyping.qual.Unqualified;
import org.checkerframework.framework.qual.EnsuresQualifier;
import org.checkerframework.framework.qual.EnsuresQualifierIf;
import org.checkerframework.framework.qual.RequiresQualifier;
import testlib.util.Odd;
class ContractsOverridingSubtyping {
static class Base {
String f;
@Odd String g;
@RequiresQualifier(expression = "f", qualifier = Odd.class)
void requiresOdd() {}
@RequiresQualifier(expression = "f", qualifier = Unqualified.class)
void requiresUnqual() {}
@EnsuresQualifier(expression = "f", qualifier = Odd.class)
void ensuresOdd() {
f = g;
}
@EnsuresQualifier(expression = "f", qualifier = Unqualified.class)
void ensuresUnqual() {}
@EnsuresQualifierIf(expression = "f", result = true, qualifier = Odd.class)
boolean ensuresIfOdd() {
f = g;
return true;
}
@EnsuresQualifierIf(expression = "f", result = true, qualifier = Unqualified.class)
boolean ensuresIfUnqual() {
return true;
}
}
static class Derived extends Base {
@Override
@RequiresQualifier(expression = "f", qualifier = Unqualified.class)
void requiresOdd() {}
@Override
@RequiresQualifier(expression = "f", qualifier = Odd.class)
// :: error: (contracts.precondition.override.invalid)
void requiresUnqual() {}
@Override
@EnsuresQualifier(expression = "f", qualifier = Unqualified.class)
// :: error: (contracts.postcondition.override.invalid)
void ensuresOdd() {
f = g;
}
@Override
@EnsuresQualifier(expression = "f", qualifier = Odd.class)
void ensuresUnqual() {
f = g;
}
@Override
@EnsuresQualifierIf(expression = "f", result = true, qualifier = Unqualified.class)
// :: error: (contracts.conditional.postcondition.true.override.invalid)
boolean ensuresIfOdd() {
f = g;
return true;
}
@Override
@EnsuresQualifierIf(expression = "f", result = true, qualifier = Odd.class)
boolean ensuresIfUnqual() {
f = g;
return true;
}
}
}
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