Package org.checkerframework.checker.index.inequality

Class LessThanVisitor

java.lang.Object

com.sun.source.util.TreeScanner<Void,Void>

com.sun.source.util.TreePathScanner<Void,Void>

org.checkerframework.framework.source.SourceVisitor<Void,Void>

org.checkerframework.common.basetype.BaseTypeVisitor<LessThanAnnotatedTypeFactory>

org.checkerframework.checker.index.inequality.LessThanVisitor

All Implemented Interfaces:

TreeVisitor<Void,Void>

public class LessThanVisitor
extends BaseTypeVisitor<LessThanAnnotatedTypeFactory>

The visitor for the Less Than Checker.

Nested Class Summary

Nested classes/interfaces inherited from class org.checkerframework.common.basetype.BaseTypeVisitor

BaseTypeVisitor.OverrideChecker

Field Summary

Fields inherited from class org.checkerframework.common.basetype.BaseTypeVisitor

assumePureGetters, atypeFactory, checker, DETERMINISTIC, IMPURE, methodTree, positions, PURE, qualHierarchy, showchecks, SIDE_EFFECT_FREE, slowTypecheckingSeconds, slowTypecheckingTree, TARGET, targetValueElement, typeHierarchy, typeValidator, unusedWhenElement, warnRedundantAnnotations

Fields inherited from class org.checkerframework.framework.source.SourceVisitor

elements, root, trees, treesWithSuppressWarnings, types

Constructor Summary

Constructors

Constructor	Description
LessThanVisitor(BaseTypeChecker checker)

Method Summary

Modifier and Type	Method	Description
protected boolean	commonAssignmentCheck(Tree varTree, ExpressionTree valueTree, @CompilerMessageKey String errorKey, Object... extraArgs)	Checks the validity of an assignment (or pseudo-assignment) from a value to a variable and emits an error message (through the compiler's messaging interface) if it is not valid.
protected boolean	commonAssignmentCheck(AnnotatedTypeMirror varType, ExpressionTree valueTree, @CompilerMessageKey String errorKey, Object... extraArgs)	Checks the validity of an assignment (or pseudo-assignment) from valueExpTree to a variable with type varType and emits an error message (through the compiler's messaging interface) if it is not valid.
protected boolean	isTypeCastSafe(AnnotatedTypeMirror castType, AnnotatedTypeMirror exprType)	Returns true if the cast is safe.

Methods inherited from class org.checkerframework.common.basetype.BaseTypeVisitor

checkAccess, checkAccessAllowed, checkArguments, checkArrayInitialization, checkConditionalPostcondition, checkConstructorInvocation, checkConstructorResult, checkContract, checkDefaultConstructor, checkExceptionParameter, checkExplicitAnnotationsOnIntersectionBounds, checkExtendsAndImplements, checkExtendsOrImplements, checkFieldInvariantDeclarations, checkMethodInvocability, checkMethodReferenceAsOverride, checkOverride, checkOverride, checkPostcondition, checkPreconditions, checkPurityAnnotations, checkQualifierParameter, checkSuperConstructorCall, checkThisConstructorCall, checkThisOrSuperConstructorCall, checkThrownExpression, checkTypeArguments, checkTypecastRedundancy, checkTypecastSafety, checkVarargs, commonAssignmentCheck, commonAssignmentCheckEndDiagnostic, commonAssignmentCheckEndDiagnostic, commonAssignmentCheckStartDiagnostic, contractExpressionAndType, createOverrideChecker, createTypeFactory, createTypeFactoryPublic, createTypeValidator, enclosingMemberSelect, enclosingStatement, getExceptionParameterLowerBoundAnnotations, getThrowUpperBoundAnnotations, getTypeFactory, isValidUse, isValidUse, isValidUse, processClassTree, processMethodTree, reportMethodInvocabilityError, reportPurityErrors, scan, setRoot, shouldPerformContractInference, shouldSkipUses, shouldWarnAboutIrrelevantJavaTypes, skipReceiverSubtypeCheck, testAnnotationInsertion, testJointJavacJavaParserVisitor, testTypevarContainment, typeCheckVectorCopyIntoArgument, validateType, validateTypeOf, visitAnnotatedType, visitAnnotatedType, visitAnnotation, visitAssignment, visitCatch, visitClass, visitCompilationUnit, visitCompoundAssignment, visitConditionalExpression, visitEnhancedForLoop, visitIdentifier, visitInstanceOf, visitLambdaExpression, visitMemberReference, visitMethod, visitMethodInvocation, visitNewArray, visitNewClass, visitReturn, visitSwitchExpression, visitThrow, visitTypeCast, visitTypeParameter, visitUnary, visitVariable, warnAboutIrrelevantJavaTypes, warnInvalidPolymorphicQualifier, warnInvalidPolymorphicQualifier, warnRedundantAnnotations

Methods inherited from class org.checkerframework.framework.source.SourceVisitor

visit

Methods inherited from class com.sun.source.util.TreePathScanner

getCurrentPath, scan

Methods inherited from class com.sun.source.util.TreeScanner

reduce, scan, visitAnyPattern, visitArrayAccess, visitArrayType, visitAssert, visitBinary, visitBindingPattern, visitBlock, visitBreak, visitCase, visitConstantCaseLabel, visitContinue, visitDeconstructionPattern, visitDefaultCaseLabel, visitDoWhileLoop, visitEmptyStatement, visitErroneous, visitExports, visitExpressionStatement, visitForLoop, visitIf, visitImport, visitIntersectionType, visitLabeledStatement, visitLiteral, visitMemberSelect, visitModifiers, visitModule, visitOpens, visitOther, visitPackage, visitParameterizedType, visitParenthesized, visitPatternCaseLabel, visitPrimitiveType, visitProvides, visitRequires, visitStringTemplate, visitSwitch, visitSynchronized, visitTry, visitUnionType, visitUses, visitWhileLoop, visitWildcard, visitYield

Methods inherited from class java.lang.Object

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

Constructor Details

LessThanVisitor

public LessThanVisitor(BaseTypeChecker checker)

Method Details

commonAssignmentCheck

protected boolean commonAssignmentCheck(Tree varTree,
 ExpressionTree valueTree,
 @CompilerMessageKey String errorKey,
 Object... extraArgs)

Description copied from class: BaseTypeVisitor

Checks the validity of an assignment (or pseudo-assignment) from a value to a variable and emits an error message (through the compiler's messaging interface) if it is not valid.

Because this method is not called for all pseudo-assignments, subclasses should only override this class if varTree is needed. Otherwise, BaseTypeVisitor.commonAssignmentCheck(AnnotatedTypeMirror, ExpressionTree, String, Object...) or BaseTypeVisitor.commonAssignmentCheck(AnnotatedTypeMirror, AnnotatedTypeMirror, Tree, String, Object...) should be overridden instead.

Overrides:

commonAssignmentCheck in class BaseTypeVisitor<LessThanAnnotatedTypeFactory>

Parameters:

varTree - the AST node for the lvalue (usually a variable)

valueTree - the AST node for the rvalue (the new value)

errorKey - the error message key to use if the check fails

extraArgs - arguments to the error message key, before "found" and "expected" types

Returns:

true if the check succeeds, false if an error message was issued

commonAssignmentCheck

protected boolean commonAssignmentCheck(AnnotatedTypeMirror varType,
 ExpressionTree valueTree,
 @CompilerMessageKey String errorKey,
 Object... extraArgs)

Description copied from class: BaseTypeVisitor

Checks the validity of an assignment (or pseudo-assignment) from valueExpTree to a variable with type varType and emits an error message (through the compiler's messaging interface) if it is not valid.

Because this method is not called for all pseudo-assignments, subclasses should only override this, if the tree of the value expression is required; otherwise, override BaseTypeVisitor.commonAssignmentCheck(AnnotatedTypeMirror, AnnotatedTypeMirror, Tree, String, Object...).

Overrides to this method should first call BaseTypeVisitor.shouldSkipUses(ExpressionTree) and return if that method returns true.

Overrides:

commonAssignmentCheck in class BaseTypeVisitor<LessThanAnnotatedTypeFactory>

Parameters:

varType - the annotated type for the lvalue (usually a variable)

valueTree - the AST node for the rvalue (the new value)

errorKey - the error message key to use if the check fails

extraArgs - arguments to the error message key, before "found" and "expected" types

Returns:

true if the check succeeds, false if an error message was issued

isTypeCastSafe

protected boolean isTypeCastSafe(AnnotatedTypeMirror castType,
 AnnotatedTypeMirror exprType)

Description copied from class: BaseTypeVisitor

Returns true if the cast is safe.

Only primary qualifiers are checked unless the command line option "checkCastElementType" is supplied.

Overrides:

isTypeCastSafe in class BaseTypeVisitor<LessThanAnnotatedTypeFactory>

Parameters:

castType - annotated type of the cast

exprType - annotated type of the casted expression

Returns:

true if the type cast is safe, false otherwise