Package com.google.errorprone.bugpatterns

Class ComparisonOutOfRange

java.lang.Object

com.google.errorprone.bugpatterns.BugChecker

com.google.errorprone.bugpatterns.ComparisonOutOfRange

All Implemented Interfaces:

BugChecker.BinaryTreeMatcher, Suppressible, Serializable

public class ComparisonOutOfRange
extends BugChecker
implements BugChecker.BinaryTreeMatcher

Author:

bill.pugh@gmail.com (Bill Pugh), eaftan@google.com (Eddie Aftandilian)

TODO(eaftan): Support other types of comparisons? Are there likely to be errors in those?

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class com.google.errorprone.bugpatterns.BugChecker

BugChecker.AnnotatedTypeTreeMatcher, BugChecker.AnnotationTreeMatcher, BugChecker.ArrayAccessTreeMatcher, BugChecker.ArrayTypeTreeMatcher, BugChecker.AssertTreeMatcher, BugChecker.AssignmentTreeMatcher, BugChecker.BinaryTreeMatcher, BugChecker.BlockTreeMatcher, BugChecker.BreakTreeMatcher, BugChecker.CaseTreeMatcher, BugChecker.CatchTreeMatcher, BugChecker.ClassTreeMatcher, BugChecker.CompilationUnitTreeMatcher, BugChecker.CompoundAssignmentTreeMatcher, BugChecker.ConditionalExpressionTreeMatcher, BugChecker.ContinueTreeMatcher, BugChecker.DoWhileLoopTreeMatcher, BugChecker.EmptyStatementTreeMatcher, BugChecker.EnhancedForLoopTreeMatcher, BugChecker.ExpressionStatementTreeMatcher, BugChecker.ForLoopTreeMatcher, BugChecker.IdentifierTreeMatcher, BugChecker.IfTreeMatcher, BugChecker.ImportTreeMatcher, BugChecker.InstanceOfTreeMatcher, BugChecker.IntersectionTypeTreeMatcher, BugChecker.LabeledStatementTreeMatcher, BugChecker.LambdaExpressionTreeMatcher, BugChecker.LiteralTreeMatcher, BugChecker.MemberReferenceTreeMatcher, BugChecker.MemberSelectTreeMatcher, BugChecker.MethodInvocationTreeMatcher, BugChecker.MethodTreeMatcher, BugChecker.ModifiersTreeMatcher, BugChecker.NewArrayTreeMatcher, BugChecker.NewClassTreeMatcher, BugChecker.ParameterizedTypeTreeMatcher, BugChecker.ParenthesizedTreeMatcher, BugChecker.PrimitiveTypeTreeMatcher, BugChecker.ReturnTreeMatcher, BugChecker.SuppressibleTreePathScanner<A,B>, BugChecker.SwitchTreeMatcher, BugChecker.SynchronizedTreeMatcher, BugChecker.ThrowTreeMatcher, BugChecker.TryTreeMatcher, BugChecker.TypeCastTreeMatcher, BugChecker.TypeParameterTreeMatcher, BugChecker.UnaryTreeMatcher, BugChecker.UnionTypeTreeMatcher, BugChecker.VariableTreeMatcher, BugChecker.WhileLoopTreeMatcher, BugChecker.WildcardTreeMatcher

Constructor Summary

Constructors

Constructor	Description
ComparisonOutOfRange()

Method Summary

Modifier and Type	Method	Description
Description	describe(com.sun.source.tree.BinaryTree tree, VisitorState state)	Suggested fixes are as follows.
Description	matchBinary(com.sun.source.tree.BinaryTree tree, VisitorState state)

Methods inherited from class com.google.errorprone.bugpatterns.BugChecker

allNames, buildDescription, buildDescription, buildDescription, canonicalName, customSuppressionAnnotations, defaultSeverity, describeMatch, describeMatch, describeMatch, describeMatch, describeMatch, describeMatch, disableable, equals, hashCode, isSuppressed, isSuppressed, isSuppressed, isSuppressed, linkUrl, message, supportsSuppressWarnings, suppressedByAnyOf, suppressedRegions

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.google.errorprone.matchers.Suppressible

allNames, canonicalName, customSuppressionAnnotations, supportsSuppressWarnings, suppressedByAnyOf

Constructor Details

ComparisonOutOfRange

public ComparisonOutOfRange()

Method Details

matchBinary

public Description matchBinary(com.sun.source.tree.BinaryTree tree,
VisitorState state)

Specified by:

matchBinary in interface BugChecker.BinaryTreeMatcher

describe

public Description describe(com.sun.source.tree.BinaryTree tree,
VisitorState state)

Suggested fixes are as follows. For the byte case, convert the literal to its byte representation. For example, "255" becomes "-1. For the character case, replace the comparison with "true"/"false" since it's not clear what was intended and that is semantically equivalent.

TODO(eaftan): Suggested fixes don't handle side-effecting expressions, such as (d = reader.read()) == -1. Maybe add special case handling for assignments.