Package daikon.inv.unary.scalar
Class Positive
- Object
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- Invariant
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- UnaryInvariant
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- SingleScalar
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- Positive
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- All Implemented Interfaces:
Serializable
,Cloneable
public class Positive extends SingleScalar
Represents the invariantx > 0
wherex
is a long scalar. This exists only as an example for the purposes of the manual. It isn't actually used (it is replaced by the more general invariant LowerBound).- See Also:
- Serialized Form
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Nested Class Summary
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Nested classes/interfaces inherited from class Invariant
Invariant.ClassVarnameComparator, Invariant.ClassVarnameFormulaComparator, Invariant.InvariantComparatorForPrinting, Invariant.Match
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Field Summary
Fields Modifier and Type Field Description static boolean
dkconfig_enabled
Boolean.-
Fields inherited from class Invariant
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
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description InvariantStatus
add_modified(long v, int count)
Similar toSingleScalar.check_modified(long, int)
except that it can change the state of the invariant if necessary.InvariantStatus
check_modified(long v, int count)
Presents a sample to the invariant.protected double
computeConfidence()
This method computes the confidence that this invariant occurred by chance.boolean
enabled()
returns whether or not this invariant is enabledString
format_using(OutputFormat format)
Return a printed representation of this invariant, in the given format.static Positive
get_proto()
Returns the prototype invariant.Positive
instantiate_dyn(PptSlice slice)
instantiate an invariant on the specified sliceboolean
isSameFormula(Invariant other)
Returns true iff the two invariants represent the same mathematical formula.-
Methods inherited from class SingleScalar
add, add_unmodified, check, check_unmodified, valid_types, valid_types_static, var
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Methods inherited from class UnaryInvariant
resurrect_done
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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, get_ni_suppressions, getConfidence, getGuardingList, getGuardingList, hasUninterestingConstant, instantiate, instantiate_ok, is_false, is_ni_suppressed, isActive, isAllPrestate, isEqualityComparison, isExact, isExclusiveFormula, isObvious, isObviousDynamically, 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, repr_prob, resurrect, simplify_format_double, simplify_format_long, simplify_format_string, state_match, toString, toString, transfer, usesVar, usesVar, usesVarDerived, varNames
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Field Detail
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dkconfig_enabled
public static boolean dkconfig_enabled
Boolean. True iff Positive invariants should be considered.
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Method Detail
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enabled
public boolean enabled()
returns whether or not this invariant is enabled
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instantiate_dyn
public Positive instantiate_dyn( Positive this, PptSlice slice)
instantiate an invariant on the specified slice- Specified by:
instantiate_dyn
in classInvariant
- Returns:
- the new invariant
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format_using
@SideEffectFree public String format_using(@GuardSatisfied Positive this, OutputFormat format)
Description copied from class:Invariant
Return a printed representation of this invariant, in the given format.- Specified by:
format_using
in classInvariant
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check_modified
public InvariantStatus check_modified(long v, int count)
Description copied from class:SingleScalar
Presents a sample to the invariant. Returns whether the sample is consistent with the invariant. Does not change the state of the invariant.- Specified by:
check_modified
in classSingleScalar
count
- how many identical samples were observed in a row. For example, three calls to check_modified with a count parameter of 1 is equivalent to one call to check_modified with a count parameter of 3.- Returns:
- whether or not the sample is consistent with the invariant
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add_modified
public InvariantStatus add_modified(long v, int count)
Description copied from class:SingleScalar
Similar toSingleScalar.check_modified(long, int)
except that it can change the state of the invariant if necessary. If the invariant doesn't have any state, then the implementation should simply callSingleScalar.check_modified(long, int)
. This method need not check for falsification; that is done by the caller.- Specified by:
add_modified
in classSingleScalar
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computeConfidence
protected double computeConfidence()
Description copied from class:Invariant
This method computes the confidence that this invariant occurred by chance. Clients should callInvariant.getConfidence()
instead.This method need not check the value of field "falsified", as the caller does that.
- Specified by:
computeConfidence
in classInvariant
- Returns:
- confidence of this invariant
- See Also:
Invariant.getConfidence()
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isSameFormula
@Pure public boolean isSameFormula(Invariant other)
Description copied from class:Invariant
Returns true iff the two invariants represent the same mathematical formula. Does not consider the context such as variable names, confidences, sample counts, value counts, or related quantities. As a rule of thumb, if two invariants format the same, this method returns true. Furthermore, in many cases, if an invariant does not involve computed constants (as "x>c" and "y=ax+b" do for constants a, b, and c), then this method vacuously returns true.- Specified by:
isSameFormula
in classInvariant
- Parameters:
other
- the invariant to compare to this one- Returns:
- true iff the two invariants represent the same mathematical formula. Does not consider
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