Package gnu.expr

Class ExpVisitor<R,D>

java.lang.Object

gnu.expr.ExpVisitor<R,D>

All Implemented Interfaces:

SourceLocator, SourceLocator, Locator

Direct Known Subclasses:

ExpExpVisitor, PushApply

public class ExpVisitor<R,D>
extends Object
implements SourceLocator

Class for doing a tree-visit over an Expression tree.

Nested Class Summary

Nested classes/interfaces inherited from interface gnu.text.SourceLocator

SourceLocator.Simple

Field Summary

Fields

Modifier and Type	Field	Description
protected LambdaExp	currentLambda
protected Object	exitValue	If exitValue is set to non-null, the visit stops.
protected SourceMessages	messages

Constructor Summary

Constructors

Constructor	Description
ExpVisitor()

Method Summary

Modifier and Type	Method	Description
protected R	defaultValue(Expression r, D d)
void	error(char kind, String message)
int	getColumnNumber()	Return current column number.
Compilation	getCompilation()	Get the Compilation associated with this visitor.
LambdaExp	getCurrentLambda()
int	getEndColumn()	Column (one-origin) of end of range; unknown/unspecified is -1.
int	getEndLine()	Line number (one-origin) of end of range; unknown/unspecified is -1.
Object	getExitValue()
String	getFileName()	Normally same as getSystemId.
Language	getLanguage()
int	getLineNumber()	Return current line number.
SourceMessages	getMessages()
String	getPublicId()
int	getStartColumn()	Column (one-origin) of start of range; unknown/unspecified is -1.
int	getStartLine()	Line number (one-origin) of start of range; unknown/unspecified is -1.
String	getSystemId()
boolean	isStableSourceLocation()	Normally same as getSystemId.
Expression	noteError(String message)
void	setColumn(int column)
void	setContext(Compilation comp)
void	setFile(String filename)
void	setLine(int line)
void	setLine(String filename, int line, int column)
protected Expression	update(Expression exp, R r)
R	visit(Expression exp, D d)	Call the visit method of argument Expression.
static <R,D> R	visit(ExpVisitor<R,D> visitor, Expression exp, D d)
Expression	visitAndUpdate(Expression exp, D d)
protected R	visitApplyExp(ApplyExp exp, D d)
protected R	visitBeginExp(BeginExp exp, D d)
protected R	visitBlockExp(BlockExp exp, D d)
protected R	visitCaseExp(CaseExp exp, D d)
protected R	visitClassExp(ClassExp exp, D d)
protected void	visitDeclarationType(Declaration decl)
protected void	visitDeclarationTypes(ScopeExp exp)
void	visitDefaultArgs(LambdaExp exp, D d)
protected R	visitExitExp(ExitExp exp, D d)
protected R	visitExpression(Expression exp, D d)
Expression[]	visitExps(Expression[] exps, int n, D d)	Call visit on the Expressions in an array.
Expression[]	visitExps(Expression[] exps, D d)
protected R	visitFluidLetExp(FluidLetExp exp, D d)
protected R	visitIfExp(IfExp exp, D d)
protected R	visitLambdaExp(LambdaExp exp, D d)
protected R	visitLangExp(LangExp exp, D d)
protected R	visitLetExp(LetExp exp, D d)
protected R	visitModuleExp(ModuleExp exp, D d)
protected R	visitObjectExp(ObjectExp exp, D d)
protected R	visitQuoteExp(QuoteExp exp, D d)
protected R	visitReferenceExp(ReferenceExp exp, D d)
protected R	visitScopeExp(ScopeExp exp, D d)
protected R	visitSetExp(SetExp exp, D d)
protected R	visitSynchronizedExp(SynchronizedExp exp, D d)
protected R	visitThisExp(ThisExp exp, D d)
protected R	visitTryExp(TryExp exp, D d)

Methods inherited from class java.lang.Object

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

Field Detail

messages

protected SourceMessages messages

currentLambda

protected LambdaExp currentLambda

exitValue

protected Object exitValue

If exitValue is set to non-null, the visit stops.

Constructor Detail

ExpVisitor

public ExpVisitor()

Method Detail

getCompilation

public Compilation getCompilation()

Get the Compilation associated with this visitor.

getLanguage

public Language getLanguage()

getMessages

public SourceMessages getMessages()

defaultValue

protected R defaultValue(Expression r,
                         D d)

visitExpression

protected R visitExpression(Expression exp,
                            D d)

setContext

public void setContext(Compilation comp)

visit

public R visit(Expression exp,
               D d)

Call the visit method of argument Expression. Could call Expression's visit directly, but this allows us to interpose a method call on each Expression. We use it to note the Expression's line number. Should not need to be overridden; if you do, you may also want to override visitExps.

visit

public static <R,D> R visit(ExpVisitor<R,D> visitor,
                                  Expression exp,
                                  D d)

update

protected Expression update(Expression exp,
                            R r)

visitApplyExp

protected R visitApplyExp(ApplyExp exp,
                          D d)

visitIfExp

protected R visitIfExp(IfExp exp,
                       D d)

visitCaseExp

protected R visitCaseExp(CaseExp exp,
                         D d)

visitDeclarationType

protected void visitDeclarationType(Declaration decl)

visitDeclarationTypes

protected final void visitDeclarationTypes(ScopeExp exp)

visitScopeExp

protected R visitScopeExp(ScopeExp exp,
                          D d)

visitLetExp

protected R visitLetExp(LetExp exp,
                        D d)

visitLambdaExp

protected R visitLambdaExp(LambdaExp exp,
                           D d)

visitClassExp

protected R visitClassExp(ClassExp exp,
                          D d)

visitObjectExp

protected R visitObjectExp(ObjectExp exp,
                           D d)

visitModuleExp

protected R visitModuleExp(ModuleExp exp,
                           D d)

visitSetExp

protected R visitSetExp(SetExp exp,
                        D d)

visitTryExp

protected R visitTryExp(TryExp exp,
                        D d)

visitBeginExp

protected R visitBeginExp(BeginExp exp,
                          D d)

visitQuoteExp

protected R visitQuoteExp(QuoteExp exp,
                          D d)

visitReferenceExp

protected R visitReferenceExp(ReferenceExp exp,
                              D d)

visitThisExp

protected R visitThisExp(ThisExp exp,
                         D d)

visitSynchronizedExp

protected R visitSynchronizedExp(SynchronizedExp exp,
                                 D d)

visitBlockExp

protected R visitBlockExp(BlockExp exp,
                          D d)

visitExitExp

protected R visitExitExp(ExitExp exp,
                         D d)

visitFluidLetExp

protected R visitFluidLetExp(FluidLetExp exp,
                             D d)

visitLangExp

protected R visitLangExp(LangExp exp,
                         D d)

getExitValue

public Object getExitValue()

getCurrentLambda

public final LambdaExp getCurrentLambda()

visitAndUpdate

public Expression visitAndUpdate(Expression exp,
                                 D d)

visitExps

public Expression[] visitExps(Expression[] exps,
                              D d)

visitExps

public Expression[] visitExps(Expression[] exps,
                              int n,
                              D d)

Call visit on the Expressions in an array. However, the visit method is inlined for speed.

visitDefaultArgs

public void visitDefaultArgs(LambdaExp exp,
                             D d)

error

public void error(char kind,
                  String message)

noteError

public Expression noteError(String message)

getFileName

public final String getFileName()

Description copied from interface: SourceLocator

Normally same as getSystemId.

Specified by:

getFileName in interface SourceLocator

getLineNumber

public final int getLineNumber()

Description copied from interface: SourceLocator

Return current line number. Normally the same as getStartLine(). The "first" line is line 1; unknown is -1.

Specified by:

getLineNumber in interface Locator

Specified by:

getLineNumber in interface SourceLocator

Specified by:

getLineNumber in interface SourceLocator

getColumnNumber

public final int getColumnNumber()

Description copied from interface: SourceLocator

Return current column number. Normally the same as getStartColumn(). The "first" column is column 1; unknown is -1.

Specified by:

getColumnNumber in interface Locator

Specified by:

getColumnNumber in interface SourceLocator

Specified by:

getColumnNumber in interface SourceLocator

getStartLine

public final int getStartLine()

Description copied from interface: SourceLocator

Line number (one-origin) of start of range; unknown/unspecified is -1.

Specified by:

getStartLine in interface SourceLocator

getStartColumn

public final int getStartColumn()

Description copied from interface: SourceLocator

Column (one-origin) of start of range; unknown/unspecified is -1.

Specified by:

getStartColumn in interface SourceLocator

getEndLine

public final int getEndLine()

Description copied from interface: SourceLocator

Line number (one-origin) of end of range; unknown/unspecified is -1.

Specified by:

getEndLine in interface SourceLocator

getEndColumn

public final int getEndColumn()

Description copied from interface: SourceLocator

Column (one-origin) of end of range; unknown/unspecified is -1.

Specified by:

getEndColumn in interface SourceLocator

getPublicId

public String getPublicId()

Specified by:

getPublicId in interface Locator

Specified by:

getPublicId in interface SourceLocator

Specified by:

getPublicId in interface SourceLocator

getSystemId

public String getSystemId()

Specified by:

getSystemId in interface Locator

Specified by:

getSystemId in interface SourceLocator

Specified by:

getSystemId in interface SourceLocator

isStableSourceLocation

public boolean isStableSourceLocation()

Normally same as getSystemId.

Specified by:

isStableSourceLocation in interface SourceLocator

setFile

public void setFile(String filename)

setLine

public void setLine(int line)

setColumn

public void setColumn(int column)

setLine

public void setLine(String filename,
                    int line,
                    int column)