Package daikon.inv.binary.twoScalar

Class NumericInt.ShiftZero

Object

Invariant

BinaryInvariant

TwoScalar

NumericInt

ShiftZero

All Implemented Interfaces:

Serializable, Cloneable

Enclosing class:

NumericInt

public static class NumericInt.ShiftZero
extends NumericInt

Represents the ShiftZero invariant between two long scalars; that is, x right-shifted by y is always zero. Prints as x >> y = 0.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class NumericInt

NumericInt.BitwiseAndZero, NumericInt.BitwiseComplement, NumericInt.BitwiseSubset, NumericInt.Divides, NumericInt.ShiftZero, NumericInt.Square, NumericInt.ZeroTrack

Nested classes/interfaces inherited from class Invariant

Invariant.ClassVarnameComparator, Invariant.ClassVarnameFormulaComparator, Invariant.InvariantComparatorForPrinting, Invariant.Match

Field Summary

Fields

Modifier and Type	Field	Description
static boolean	dkconfig_enabled	Boolean.

Fields inherited from class NumericInt

var1_eq_0, var1_eq_1, var1_eq_minus_1, var1_eq_var2, var1_ge_0, var1_le_var2, var1_ne_0, var2_eq_0, var2_eq_1, var2_eq_minus_1, var2_eq_var1, var2_ge_0, var2_ne_0, var2_valid_shift

Fields inherited from class TwoScalar

swap

Fields inherited from class Invariant

checkedMergeOverridden, CONFIDENCE_JUSTIFIED, CONFIDENCE_NEVER, CONFIDENCE_UNJUSTIFIED, debug, debugFlow, debugGuarding, debugIsObvious, debugIsWorthPrinting, debugPrint, debugPrintEquality, dkconfig_confidence_limit, dkconfig_fuzzy_ratio, dkconfig_simplify_define_predicates, falsified, invariantEnabledDefault, isGuardingPredicate, min_mod_non_missing_samples, ppt, PROBABILITY_JUSTIFIED, PROBABILITY_NEVER, PROBABILITY_UNJUSTIFIED

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ShiftZero(boolean swap)
protected	ShiftZero(PptSlice ppt, boolean swap)

Method Summary

Modifier and Type	Method	Description
boolean	enabled()	Returns whether or not this class of invariants is currently enabled.
boolean	eq_check(long x, long y)	Returns true if x and y don't invalidate the invariant.
String	get_format_str(OutputFormat format)	Return a format string for the specified output format.
NISuppressionSet	get_ni_suppressions()	Returns a list of non-instantiating suppressions for this invariant.
static NumericInt.ShiftZero	get_proto(boolean swap)	Returns the prototype invariant.
protected NumericInt.ShiftZero	instantiate_dyn(PptSlice slice)	Instantiates (creates) an invariant of the same class on the specified slice.

Methods inherited from class NumericInt

check_modified, format_using, get_proto_all, instantiate_ok, is_subscript, isExact, isObviousDynamically, obvious_checks, repr

Methods inherited from class TwoScalar

add, add_modified, add_unmodified, check, check_unmodified, computeConfidence, get_swap, isSameFormula, resurrect_done, resurrect_done_swapped, resurrect_done_unswapped, valid_types, var1, var1, var2, var2

Methods inherited from class BinaryInvariant

add_unordered, check_unordered, find, is_symmetric

Methods inherited from class Invariant

add_sample, asInvClass, checkRep, clear_falsified, clone, clone_and_permute, conf_is_ge, confidence_and, confidence_and, confidence_or, createGuardedInvariant, createGuardingPredicate, enoughSamples, falsify, find, format, format_classname, format_too_few_samples, format_unimplemented, formatFuzzy, get_comparability, getConfidence, getGuardingList, getGuardingList, hasUninterestingConstant, instantiate, is_false, is_ni_suppressed, isActive, isAllPrestate, isEqualityComparison, isExclusiveFormula, isObvious, isObviousDynamically, isObviousDynamically_SomeInEquality, isObviousDynamically_SomeInEqualityHelper, isObviousStatically, isObviousStatically, isObviousStatically_AllInEquality, isObviousStatically_SomeInEquality, isObviousStatically_SomeInEqualityHelper, isReflexive, isSameInvariant, isValidEscExpression, isValidExpression, isWorthPrinting, justified, log, log, logDetail, logOn, match, merge, mergeFormulasOk, permute, prob_and, prob_and, prob_is_ge, prob_or, repCheck, repr_prob, resurrect, simplify_format_double, simplify_format_long, simplify_format_string, state_match, toString, toString, transfer, usesVar, usesVar, usesVarDerived, varNames

Methods inherited from class Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

dkconfig_enabled

public static boolean dkconfig_enabled

Boolean. True iff ShiftZero invariants should be considered.

Constructor Detail

ShiftZero

protected ShiftZero(PptSlice ppt,
                    boolean swap)

ShiftZero

protected ShiftZero(boolean swap)

Method Detail

get_proto

public static NumericInt.ShiftZero get_proto(boolean swap)

Returns the prototype invariant.

enabled

public boolean enabled()

Description copied from class: Invariant

Returns whether or not this class of invariants is currently enabled.

Its implementation is almost always return dkconfig_enabled;.

Specified by:

enabled in class Invariant

instantiate_dyn

protected NumericInt.ShiftZero instantiate_dyn( NumericInt.ShiftZero this,
                                               PptSlice slice)

Description copied from class: Invariant

Instantiates (creates) an invariant of the same class on the specified slice. Must be overridden in each class. Must be used rather than Invariant.clone() so that checks in Invariant.instantiate(daikon.PptSlice) for reasonable invariants are done.

The implementation of this method is almost always return new <em>InvName</em>(slice);

Specified by:

instantiate_dyn in class Invariant

Returns:

the new invariant

get_format_str

public String get_format_str(@GuardSatisfied NumericInt.ShiftZero this,
                             OutputFormat format)

Description copied from class: NumericInt

Return a format string for the specified output format. Each instance of %varN% will be replaced by the correct name for varN.

Specified by:

get_format_str in class NumericInt

eq_check

public boolean eq_check(long x,
                        long y)

Description copied from class: NumericInt

Returns true if x and y don't invalidate the invariant.

Specified by:

eq_check in class NumericInt

get_ni_suppressions

@Pure
public NISuppressionSet get_ni_suppressions()

Returns a list of non-instantiating suppressions for this invariant.

Overrides:

get_ni_suppressions in class Invariant

Returns:

the set of non-instantiating suppressions for this invariant