io.opsit.explang

Class ASTN

java.lang.Object

io.opsit.explang.ASTN

Direct Known Subclasses:

ASTNLeaf, ASTNList

public abstract class ASTN
extends Object

Abstract syntax tree node containing some code object.

Represents node in abstract syntax tree. A node may be a leaf node containing a or a list node containing several ASTN nodes.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	ASTN.Walker

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	isComment
protected Object	object
protected ASTNList	parent
protected ParseCtx	pctx
Exception	problem

Constructor Summary

Constructors

Constructor and Description
ASTN(Object object, ParseCtx pctx) Make an ASTN node for a code node.
ASTN(Object object, ParseCtx pctx, boolean isComment) Make an ASTN node, possible for a comment node.
ASTN(Object object, ParseCtx pctx, Exception ex) Make an ASTN node for an invalid expression.

Method Summary

Modifier and Type	Method and Description
void	dispatchWalker(ASTN.Walker walker) dispatch walker run on ASTN tree.
abstract Object	getObject()
ASTN	getParent()
ParseCtx	getPctx()
Exception	getProblem()
abstract boolean	hasProblems()
boolean	isComment()
abstract boolean	isList()
String	toString()
String	toStringWithPos() Print out a node with source code location and error messages.

Methods inherited from class java.lang.Object

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

Field Detail

pctx

protected ParseCtx pctx

object

protected Object object

isComment

protected boolean isComment

parent

protected ASTNList parent

problem

public Exception problem

Constructor Detail

ASTN

public ASTN(Object object,
            ParseCtx pctx)

Make an ASTN node for a code node.

ASTN

public ASTN(Object object,
            ParseCtx pctx,
            boolean isComment)

Make an ASTN node, possible for a comment node.

ASTN

public ASTN(Object object,
            ParseCtx pctx,
            Exception ex)

Make an ASTN node for an invalid expression.

Method Detail

hasProblems

public abstract boolean hasProblems()

getProblem

public Exception getProblem()

getPctx

public ParseCtx getPctx()

isList

public abstract boolean isList()

isComment

public boolean isComment()

getObject

public abstract Object getObject()

getParent

public ASTN getParent()

toString

public String toString()

Overrides:

toString in class Object

toStringWithPos

public String toStringWithPos()

Print out a node with source code location and error messages.

dispatchWalker

public void dispatchWalker(ASTN.Walker walker)

dispatch walker run on ASTN tree.