Package daikon.inv.unary.sequence
Class EltwiseFloatLessThan
- Object
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- Invariant
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- UnaryInvariant
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- SingleSequence
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- SingleFloatSequence
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- EltwiseFloatComparison
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- EltwiseFloatLessThan
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- All Implemented Interfaces:
Serializable
,Cloneable
public class EltwiseFloatLessThan extends EltwiseFloatComparison
Represents the invariant < between adjacent elements (x[i], x[i+1]) of a double sequence. Prints asx[] sorted by <
.- 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 SingleSequence
dkconfig_SeqIndexDisableAll
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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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Constructor Summary
Constructors Modifier Constructor Description protected
EltwiseFloatLessThan()
protected
EltwiseFloatLessThan(PptSlice ppt)
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description InvariantStatus
add_modified(double @Interned [] a, int count)
Similar toSingleFloatSequence.check_modified(double[], int)
except that it can change the state of the invariant if necessary.InvariantStatus
check_modified(double @Interned [] a, int count)
Presents a sample to the invariant.EltwiseFloatLessThan
clone()
Do nothing special, Overridden to remove exception from declaration.protected double
computeConfidence()
This method computes the confidence that this invariant occurred by chance.boolean
enabled()
returns whether or not this invariant is enabledstatic @Nullable EltwiseFloatLessThan
find(PptSlice ppt)
String
format_csharp_contract()
String
format_daikon()
String
format_esc()
String
format_java_family(OutputFormat format)
String
format_simplify()
String
format_using(OutputFormat format)
Return a printed representation of this invariant, in the given format.static EltwiseFloatLessThan
get_proto()
Returns the prototype invariant for EltwiseFloatLessThanboolean
hasSeenNonSingletonSample()
This function returns whether a sample has been seen by this Invariant that includes two or more entries in an array.protected EltwiseFloatLessThan
instantiate_dyn(PptSlice slice)
Instantiate the invariant on the specified slice.boolean
instantiate_ok(VarInfo[] vis)
Non-equality EltwiseFloatLessThan invariants are only valid on integral types.boolean
isExact()
Subclasses should override.boolean
isExclusiveFormula(Invariant other)
Returns true iff the two invariants represent mutually exclusive mathematical formulas -- that is, if one of them is true, then the other must be false.@Nullable DiscardInfo
isObviousDynamically(VarInfo[] vis)
Return non-null if this invariant is necessarily true from a fact that can be determined dynamically (after checking data) -- for the given varInfos rather than the varInfos of this.boolean
isSameFormula(Invariant other)
Returns true iff the two invariants represent the same mathematical formula.String
repr()
For printing invariants, there are two interfaces: repr gives a low-level representation (Invariant.repr_prob()
also prints the confidence), andInvariant.format()
gives a high-level representation for user output.-
Methods inherited from class SingleFloatSequence
add, add_unmodified, check, check_unmodified, valid_types
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Methods inherited from class SingleSequence
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_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, is_false, is_ni_suppressed, isActive, isAllPrestate, isEqualityComparison, 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
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Field Detail
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dkconfig_enabled
public static boolean dkconfig_enabled
Boolean. True iff EltwiseIntComparison invariants should be considered.
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Constructor Detail
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EltwiseFloatLessThan
protected EltwiseFloatLessThan(PptSlice ppt)
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EltwiseFloatLessThan
protected EltwiseFloatLessThan()
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Method Detail
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get_proto
public static EltwiseFloatLessThan get_proto()
Returns the prototype invariant for EltwiseFloatLessThan
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enabled
public boolean enabled()
returns whether or not this invariant is enabled
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instantiate_ok
public boolean instantiate_ok(VarInfo[] vis)
Non-equality EltwiseFloatLessThan invariants are only valid on integral types.- Overrides:
instantiate_ok
in classInvariant
- See Also:
Invariant.valid_types(VarInfo[])
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instantiate_dyn
protected EltwiseFloatLessThan instantiate_dyn( EltwiseFloatLessThan this, PptSlice slice)
Instantiate the invariant on the specified slice.- Specified by:
instantiate_dyn
in classInvariant
- Returns:
- the new invariant
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clone
@SideEffectFree public EltwiseFloatLessThan clone(@GuardSatisfied EltwiseFloatLessThan this)
Description copied from class:Invariant
Do nothing special, Overridden to remove exception from declaration.
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repr
public String repr(@GuardSatisfied EltwiseFloatLessThan this)
Description copied from class:Invariant
For printing invariants, there are two interfaces: repr gives a low-level representation (Invariant.repr_prob()
also prints the confidence), andInvariant.format()
gives a high-level representation for user output.
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format_using
@SideEffectFree public String format_using(@GuardSatisfied EltwiseFloatLessThan 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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format_daikon
public String format_daikon(@GuardSatisfied EltwiseFloatLessThan this)
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format_esc
public String format_esc(@GuardSatisfied EltwiseFloatLessThan this)
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format_java_family
public String format_java_family(@GuardSatisfied EltwiseFloatLessThan this, OutputFormat format)
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format_csharp_contract
public String format_csharp_contract(@GuardSatisfied EltwiseFloatLessThan this)
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format_simplify
public String format_simplify(@GuardSatisfied EltwiseFloatLessThan this)
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check_modified
public InvariantStatus check_modified(double @Interned [] a, int count)
Description copied from class:SingleFloatSequence
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 classSingleFloatSequence
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(double @Interned [] a, int count)
Description copied from class:SingleFloatSequence
Similar toSingleFloatSequence.check_modified(double[], 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 callSingleFloatSequence.check_modified(double[], int)
. This method need not check for falsification; that is done by the caller.- Specified by:
add_modified
in classSingleFloatSequence
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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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isExact
@Pure public boolean isExact()
Description copied from class:Invariant
Subclasses should override. An exact invariant indicates that given all but one variable value, the last one can be computed. (I think that's correct, anyway.) Examples are IntComparison (when only equality is possible), LinearBinary, FunctionUnary. OneOf is treated differently, as an interface. The result of this method does not depend on whether the invariant is justified, destroyed, etc.
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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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isExclusiveFormula
@Pure public boolean isExclusiveFormula(Invariant other)
Description copied from class:Invariant
Returns true iff the two invariants represent mutually exclusive mathematical formulas -- that is, if one of them is true, then the other must be false. This method does not consider the context such as variable names, confidences, sample counts, value counts, or related quantities.- Overrides:
isExclusiveFormula
in classInvariant
- Parameters:
other
- the other invariant to compare to this one- Returns:
- true iff the two invariants represent mutually exclusive mathematical formulas
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find
public static @Nullable EltwiseFloatLessThan find(PptSlice ppt)
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hasSeenNonSingletonSample
public boolean hasSeenNonSingletonSample()
This function returns whether a sample has been seen by this Invariant that includes two or more entries in an array. For a 0 or 1 element array a, a[] sorted by any binary operation is "vacuously true" because no check is ever made since the binary operation requires two operands. Thus although invariants of this type are true regarding 0 or 1 length arrays, they are meaningless. This function is meant to be used in isObviousImplied() to prevent such meaningless invariants from being printed.- Specified by:
hasSeenNonSingletonSample
in classEltwiseFloatComparison
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isObviousDynamically
@Pure public @Nullable DiscardInfo isObviousDynamically(VarInfo[] vis)
Description copied from class:Invariant
Return non-null if this invariant is necessarily true from a fact that can be determined dynamically (after checking data) -- for the given varInfos rather than the varInfos of this. Conceptually, this means, "Is this invariant dynamically obvious if its VarInfos were switched with vis?" Intended to be overriden by subclasses so they can filter invariants after checking; the overriding method should first call "super.isObviousDynamically(vis)". Since this method is dynamic, it should only be called after all processing.- Overrides:
isObviousDynamically
in classInvariant
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