xtc.parser
Class TreeTyper

java.lang.Object
  xtc.tree.Visitor
      xtc.parser.TreeTyper

public class TreeTyper
extends Visitor

Visitor to determine a grammar's tree structure. This visitor assumes that the entire grammar is contained in a single module and has been annotated with appropriate value elements.

Version:

$Revision: 1.26 $

Field Summary

protected Analyzer	analyzer The analyzer utility.
protected AST	ast The common type operations.
protected boolean	flatten The flag for flattening lists.
protected Runtime	runtime The runtime.
protected Sequence	sequence The current sequence.
protected boolean	strict The flag for strict unification.

Constructor Summary

TreeTyper(Runtime runtime, Analyzer analyzer, AST ast)
Create a new tree typer.

Method Summary

protected void	process(String name, boolean isAction, List<Binding> children) Determine the type of the specified generic node constructor.
void	visit(Element e) Visit the specified element.
void	visit(GenericActionValue v) Visit the specified generic action value.
void	visit(GenericNodeValue v) Visit the specified generic node value.
void	visit(Module m) Visit the specified module.
void	visit(OrderedChoice c) Visit the specified ordered choice.
void	visit(Production p) Visit the specified production.
void	visit(Sequence s) Visit the specified sequence.
void	visit(UnaryOperator op) Visit the specified unary operator.

Methods inherited from class xtc.tree.Visitor

dispatch, equals, hashCode, iterate, map, mapInPlace, unableToVisit, visit

Methods inherited from class java.lang.Object

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

Field Detail

runtime

protected final Runtime runtime

The runtime.

analyzer

protected final Analyzer analyzer

The analyzer utility.

ast

protected final AST ast

The common type operations.

strict

protected boolean strict

The flag for strict unification.

flatten

protected boolean flatten

The flag for flattening lists.

sequence

protected Sequence sequence

The current sequence.

Constructor Detail

TreeTyper

public TreeTyper(Runtime runtime,
                 Analyzer analyzer,
                 AST ast)

Create a new tree typer.

Parameters:

runtime - The runtime.

ast - The type operations.

analyzer - The analyzer utility.

Method Detail

visit

public void visit(Module m)

Visit the specified module.

visit

public void visit(Production p)

Visit the specified production.

visit

public void visit(OrderedChoice c)

Visit the specified ordered choice.

visit

public void visit(Sequence s)

Visit the specified sequence.

visit

public void visit(UnaryOperator op)

Visit the specified unary operator.

visit

public void visit(Element e)

Visit the specified element.

visit

public void visit(GenericNodeValue v)

Visit the specified generic node value.

visit

public void visit(GenericActionValue v)

Visit the specified generic action value.

process

protected void process(String name,
                       boolean isAction,
                       List<Binding> children)

Determine the type of the specified generic node constructor.

Parameters:

name - The constructor's name.

isAction - The flag for whether the constructor appears in an action.

children - The list of bindings for the children.