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ternaryNode Class Reference

Ternary expression. More...

#include <ast.h>

Inheritance diagram for ternaryNode::

List of all members.

Public Methods
	ternaryNode (exprNode *cond, exprNode *true_br, exprNode *false_br, const Coord qmark_coord=Coord::Unknown, const Coord colon_coord=Coord::Unknown)
	Create a new ternary expression. More...
virtual	~ternaryNode ()
	Destroy a ternaryNode. More...
virtual void	eval ()
	Constant expression evaluator. 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_expr (output_context &ct, Node *par, int prec, Assoc assoc)
	Output a expression. More...
virtual int	precedence (Assoc &assoc)
	Associativity and precedence. More...
Accessors
Methods to get and set fields in the class.
exprNode *	cond () const
exprNode *	get_cond ()
void	cond (exprNode *cond)
exprNode *	true_br () const
exprNode *	get_true_br ()
void	true_br (exprNode *true_br)
exprNode *	false_br () const
exprNode *	get_false_br ()
void	false_br (exprNode *false_br)
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 *	_cond
	the ternary condition expression. More...
TREE exprNode *	_true_br
	the true branch expression. More...
TREE exprNode *	_false_br
	the false branch expression. More...
Coord	_colon_coord
	the location of the colon in the source code. More...

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Detailed Description

Ternary expression.

This class represents the ternary operator ( expr ? expr : expr ).

The NodeType is Ternary.

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Constructor & Destructor Documentation

ternaryNode::ternaryNode (  exprNode *    cond, exprNode *    true_br, exprNode *    false_br, const Coord    qmark_coord = Coord::Unknown, const Coord    colon_coord = Coord::Unknown )

Create a new ternary expression. The new ternary expression has the given condition, true and false expressions. Parameters: cond  the condition expression true_br  the true branch expression false_br  the false branch expression qmark_coord  the location of the question mark in the source code colon_coord  the location of the colon in the source code

ternaryNode::~ternaryNode (    )  [virtual]

Destroy a ternaryNode. 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 * ternaryNode::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* ternaryNode::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 ternaryNode::cond (  exprNode *    cond )  [inline]

exprNode* ternaryNode::cond (    )  const [inline]

void ternaryNode::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 ternaryNode::eval (    )  [virtual]

Constant expression evaluator. This method attempts to evaluate an expression at compile-time. This only yields a meaningful value when the leaves of the given expression are constants, enums, or other compile-time values (e.g., sizeof). The resulting value is stored on each exprNode, in the _value field. Each exprNode sublcass implements this method, calling it recursively when necessary. Reimplemented from exprNode.

void ternaryNode::false_br (  exprNode *    false_br )  [inline]

exprNode* ternaryNode::false_br (    )  const [inline]

exprNode* ternaryNode::get_cond (    )  [inline]

exprNode* ternaryNode::get_false_br (    )  [inline]

exprNode* ternaryNode::get_true_br (    )  [inline]

void ternaryNode::output_expr (  output_context &    ct, Node *    parent, int    prec, Assoc    assoc )  [virtual]

Output a expression. Reimplemented from exprNode.

int ternaryNode::precedence (  Assoc &    assoc )  [virtual]

Associativity and precedence. Determine the associativity and precedence of the expression. Each exprNode subclass overrides this method to provide the specific results. The default is highest precedence and left-associative. See also: exprNode::output_expr() , exprNode::parens() Parameters: assoc  a reference parameter that is set to the associativity value Returns: the precedence value Reimplemented from exprNode.

void ternaryNode::true_br (  exprNode *    true_br )  [inline]

exprNode* ternaryNode::true_br (    )  const [inline]

void ternaryNode::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 ternaryNode::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

Coord ternaryNode::_colon_coord [private]

the location of the colon in the source code.

TREE exprNode* ternaryNode::_cond [private]

the ternary condition expression.

TREE exprNode* ternaryNode::_false_br [private]

the false branch expression.

TREE exprNode* ternaryNode::_true_br [private]

the true branch expression.

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

• ast.h
• ternarynode.cc

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