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breakNode Class Reference

Break statement. More...

#include <ast.h>

Inheritance diagram for breakNode::

List of all members.

Public Methods
	breakNode (stmtNode *container, const Coord coord=Coord::Unknown)
	Create a new break statement within a statement. More...
	breakNode (const Coord coord=Coord::Unknown)
	Create a new break statement without a statement. More...
virtual	~breakNode ()
	Destroy a breakNode. More...
virtual void	dataflow (FlowVal *v, FlowProblem &fp)
	Run the dataflow analyzer. More...
virtual Node *	clone () const
	Clone the input node. More...
virtual void	output_stmt (output_context &ct, Node *par)
	Output a statement. More...
Accessors
Methods to get and set fields in the class.
stmtNode *	container () const
void	container (stmtNode *container)
AST Traversal
Methods to uniformly traverse the AST. See the documentation in the Node class.
virtual void	visit (Visitor *the_visitor)
	Dispatch a Visitor. More...
virtual void	walk (Walker &the_walker)
	Dispatch a Walker. More...
virtual Node *	change (Changer &the_changer, bool redispatch=false)
	Dispatch a Changer. More...
Private Attributes
REF stmtNode *	_container
	a reference the containing statement. More...

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Detailed Description

Break statement.

This class represents the break statement. It has a reference to the containing loop or switch statement, which is initially set to null. It is computed after parsing by the set_container_walker.

The NodeType is Break

See also:

set_container_walker

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Constructor & Destructor Documentation

breakNode::breakNode (  stmtNode *    container, const Coord    coord = Coord::Unknown )

Create a new break statement within a statement. The new break statement automatically has the given containing statement. Pass null if the containing statement is unknown. Parameters: container  the containing statement, or null. coord  the location of the construct in the source file.

breakNode::breakNode (  const Coord    the_coord = Coord::Unknown )

Create a new break statement without a statement. The new break statement has no containing statement reference. It can be computed using the set_container_walker. Parameters: coord  the location of the construct in the source file.

breakNode::~breakNode (    )  [virtual]

Destroy a breakNode. Warning: Do not use the destructors to delete AST nodes. Instead, rely on the node garbage collector.

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Member Function Documentation

Node * breakNode::change (  Changer &    the_changer, bool    redispatch = false )  [virtual]

Dispatch a Changer. This abstract method works much the walker, but allows the tree to be changed. Parameters: the_changer  the specific Changer object to use. redispatch  pass true to revisit parts of the tree that have changed. Reimplemented from Node.

virtual Node* breakNode::clone (    )  const [inline, virtual]

Clone the input node. This is not a "deep" clone, so be careful. For a deep clone, use the clone_changer class. Returns: a shallow copy of the node (no subtrees are copied). Reimplemented from Node.

void breakNode::container (  stmtNode *    container )  [inline]

stmtNode* breakNode::container (    )  const [inline]

void breakNode::dataflow (  FlowVal *    v, FlowProblem &    fp )  [virtual]

Run the dataflow analyzer. Each subclass overrides this method to define it's semantics for dataflow analysis. It alters the input flow value to reflect the effect of the node within the given flow problem, calling dataflow() on it's subtrees as necessary. See the dataflow analysis documentation for more information. Parameters: v  the flow value to pass through the node. fp  the flow problem (specifying the transfer functions). Reimplemented from Node.

void breakNode::output_stmt (  output_context &    ct, Node *    parent )  [virtual]

Output a statement. Reimplemented from stmtNode.

void breakNode::visit (  Visitor *    the_visitor )  [virtual]

Dispatch a Visitor. This abstract method is the entry point for the visitor design pattern. Each node subclass defines a visit() method that calls the appropriate at_ method in the visitor. For more information see the Visitor documentation. Parameters: the_visitor  the specific Visitor object to use. Reimplemented from Node.

void breakNode::walk (  Walker &    the_walker )  [virtual]

Dispatch a Walker. This abstract method works much like the visitor, but instead walks the entire underlying subtree calling the appropriate at_ method at each node. For more information see the Walker documentation. Parameters: the_walker  the specific Walker object to use. Reimplemented from Node.

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Member Data Documentation

REF stmtNode* breakNode::_container [private]

a reference the containing statement. A break statement may be contained in a loop, or a switch statement. Initiallly, this reference is null, but is computed after parsing by the set_container_walker.

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The documentation for this class was generated from the following files:

• ast.h
• breaknode.cc

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