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exprstmtNode Class Reference

Expression statement. More...

#include <ast.h>

Inheritance diagram for exprstmtNode::

List of all members.

Public Methods
	exprstmtNode (exprNode *expr)
	Create an expression statement. More...
virtual	~exprstmtNode ()
	Destroy a exprstmtNode. More...
typeNode *	base_type (bool TdefIndir) const
	Return the base data type of a node. 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.
exprNode *	expr () const
exprNode *	get_expr ()
void	expr (exprNode *expr)
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
TREE exprNode *	_expr
	the expression. More...

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Detailed Description

Expression statement.

This class represent simple statements that just consist of an expression. This is just a wrapper that makes explicit that fact that any expression is also a statement.

The NodeType is Expr

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Constructor & Destructor Documentation

exprstmtNode::exprstmtNode (  exprNode *    expr )

Create an expression statement. The new statement has the given expression Parameters: expr  the expression

exprstmtNode::~exprstmtNode (    )  [virtual]

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

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Member Function Documentation

typeNode * exprstmtNode::base_type (  bool    TdefIndir )  const [virtual]

Return the base data type of a node. This method differs from the Node::type() method in two respects. First, it follows some of the simple type inferences. For example, calling it on an idNode will return the type of its declaration. Second, the boolean argument indicates whether or not to follow typedef links. Parameters: TdefIndir  pass true to follow typedefs to their definitions. Reimplemented from Node.

Node * exprstmtNode::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* exprstmtNode::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 exprstmtNode::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 exprstmtNode::expr (  exprNode *    expr )  [inline]

exprNode* exprstmtNode::expr (    )  const [inline]

exprNode* exprstmtNode::get_expr (    )  [inline]

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

Output a statement. Reimplemented from stmtNode.

void exprstmtNode::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 exprstmtNode::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

TREE exprNode* exprstmtNode::_expr [private]

the expression.

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

• ast.h
• exprstmtnode.cc

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