piglet.visitor
Class PigletFormatter

java.lang.Object
  piglet.visitor.DepthFirstVisitor
      piglet.visitor.TreeFormatter
          piglet.visitor.PigletFormatter

All Implemented Interfaces:

Visitor

public class PigletFormatter
extends TreeFormatter

A pretty printer visitor designed to be used together with TreeDumper to generate a formatted string that is the Piglet code. Taken from here, in the homework's website.

Author:

Jens Palsberg

See Also:

TreeDumper

Constructor Summary

PigletFormatter()

Method Summary

protected void	processList(NodeListInterface n) Accepts a NodeListInterface object and performs an optional format command between each node in the list (but not after the last node).
void	visit(Call n) nodeToken -> "CALL" exp -> Exp() nodeToken1 -> "(" nodeListOptional -> ( Exp() )* nodeToken2 -> ")"
void	visit(Goal n) nodeToken -> "MAIN" stmtList -> StmtList() nodeToken1 -> "END" nodeListOptional -> ( Procedure() )* nodeToken2 -> <EOF>
void	visit(NodeToken n) Executes the commands waiting in the command queue, then inserts the proper location information into the current NodeToken.
void	visit(Procedure n) label -> Label() nodeToken -> "[" integerLiteral -> IntegerLiteral() nodeToken1 -> "]" stmtExp -> StmtExp()
void	visit(StmtExp n) nodeToken -> "BEGIN" stmtList -> StmtList() nodeToken1 -> "RETURN" exp -> Exp() nodeToken2 -> "END"

Methods inherited from class piglet.visitor.TreeFormatter

add, force, force, indent, indent, outdent, outdent, processList, space, space, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit

Methods inherited from class piglet.visitor.DepthFirstVisitor

visit, visit, visit, visit

Methods inherited from class java.lang.Object

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

Constructor Detail

PigletFormatter

public PigletFormatter()

Method Detail

processList

protected void processList(NodeListInterface n)

Description copied from class: TreeFormatter

Accepts a NodeListInterface object and performs an optional format command between each node in the list (but not after the last node).

Overrides:

processList in class TreeFormatter

visit

public void visit(NodeToken n)

Description copied from class: TreeFormatter

Executes the commands waiting in the command queue, then inserts the proper location information into the current NodeToken. If there are any special tokens preceding this token, they will be given the current location information. The token will follow on the next line, at the proper indentation level. If this is not the behavior you want from special tokens, feel free to modify this method.

Specified by:

visit in interface Visitor

Overrides:

visit in class TreeFormatter

visit

public void visit(Goal n)

Description copied from class: TreeFormatter

 nodeToken -> "MAIN"
 stmtList -> StmtList()
 nodeToken1 -> "END"
 nodeListOptional -> ( Procedure() )*
 nodeToken2 -> <EOF>
 

Specified by:

visit in interface Visitor

Overrides:

visit in class TreeFormatter

visit

public void visit(Procedure n)

Description copied from class: TreeFormatter

 label -> Label()
 nodeToken -> "["
 integerLiteral -> IntegerLiteral()
 nodeToken1 -> "]"
 stmtExp -> StmtExp()
 

Specified by:

visit in interface Visitor

Overrides:

visit in class TreeFormatter

visit

public void visit(StmtExp n)

Description copied from class: TreeFormatter

 nodeToken -> "BEGIN"
 stmtList -> StmtList()
 nodeToken1 -> "RETURN"
 exp -> Exp()
 nodeToken2 -> "END"
 

Specified by:

visit in interface Visitor

Overrides:

visit in class TreeFormatter

visit

public void visit(Call n)

Description copied from class: TreeFormatter

 nodeToken -> "CALL"
 exp -> Exp()
 nodeToken1 -> "("
 nodeListOptional -> ( Exp() )*
 nodeToken2 -> ")"
 

Specified by:

visit in interface Visitor

Overrides:

visit in class TreeFormatter