ParseTreeSpecializer

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ptolemy.data.expr
Class ParseTreeSpecializer

java.lang.Object
  ptolemy.data.expr.AbstractParseTreeVisitor
      ptolemy.data.expr.ParseTreeSpecializer

All Implemented Interfaces:: ParseTreeVisitor

public class ParseTreeSpecializer
extends AbstractParseTreeVisitor
extends AbstractParseTreeVisitor

This class reduces a parse tree, given a scope of bound variables. If an identifier is not found in the given scope, then the identifier is bound to any constants registered with the expression parser. If any subtrees of the parse tree become constant, they are evaluated and replaced with leaf nodes containing the evaluated result.

Since:

Ptolemy II 2.1

Version:

$Id: ParseTreeSpecializer.java 57040 2010-01-27 20:52:32Z cxh $

Author:

Steve Neuendorffer

See Also:

ASTPtRootNode

Accepted Rating:

Red (cxh)

Proposed Rating:

Red (neuendor)

Field Summary
`protected ParseTreeEvaluator`	`_evaluator`
`protected java.util.List`	`_excludedNames`
`protected ASTPtRootNode`	`_result`
`protected ParserScope`	`_scope`

Constructor Summary
`ParseTreeSpecializer()`

Method Summary
`protected boolean`	`_childrenAreConstant(ASTPtRootNode node)` Return true if all of the children of this node are constant.
`protected void`	`_defaultVisit(ASTPtRootNode node)`
`protected void`	`_replaceConstantNode(ASTPtRootNode node)`
`ASTPtRootNode`	`specialize(ASTPtRootNode node, java.util.List excludedNames, ParserScope scope)` Return a new parse tree resulting from the specialization of the given parse tree.
`void`	`visitArrayConstructNode(ASTPtArrayConstructNode node)`
`void`	`visitBitwiseNode(ASTPtBitwiseNode node)`
`void`	`visitFunctionalIfNode(ASTPtFunctionalIfNode node)`
`void`	`visitFunctionApplicationNode(ASTPtFunctionApplicationNode node)`
`void`	`visitFunctionDefinitionNode(ASTPtFunctionDefinitionNode node)`
`void`	`visitLeafNode(ASTPtLeafNode node)`
`void`	`visitLogicalNode(ASTPtLogicalNode node)`
`void`	`visitMatrixConstructNode(ASTPtMatrixConstructNode node)`
`void`	`visitMethodCallNode(ASTPtMethodCallNode node)`
`void`	`visitPowerNode(ASTPtPowerNode node)`
`void`	`visitProductNode(ASTPtProductNode node)`
`void`	`visitRecordConstructNode(ASTPtRecordConstructNode node)`
`void`	`visitRelationalNode(ASTPtRelationalNode node)`
`void`	`visitShiftNode(ASTPtShiftNode node)`
`void`	`visitSumNode(ASTPtSumNode node)`
`void`	`visitUnaryNode(ASTPtUnaryNode node)`

Methods inherited from class ptolemy.data.expr.AbstractParseTreeVisitor
`_unsupportedVisitException, _visitAllChildren, _visitChild, visitAssignmentNode, visitUnionConstructNode`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

_excludedNames

protected java.util.List _excludedNames

_result

protected ASTPtRootNode _result

_scope

protected ParserScope _scope

_evaluator

protected ParseTreeEvaluator _evaluator

Constructor Detail