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selectionNode Class ReferenceSelection statement.
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Garbage collection. | |
bool | mark |
static node_list | nodes |
static map< Node *, bool > | deleted_nodes |
Public Member Functions | |
selectionNode (NodeType typ, exprNode *expr, stmtNode *stmt, const Coord coord) | |
Create a new selection statement. | |
virtual | ~selectionNode () |
Destroy a selectionNode. | |
virtual void | output (output_context &ct, Node *par) |
Generate C code. | |
virtual void | output_stmt (output_context &ct, Node *par)=0 |
Output a statement. | |
void | output_comment (output_context &ct) |
virtual typeNode * | type () const |
Return the node data type. | |
virtual typeNode * | base_type (bool TdefIndir) const |
Return the base data type of a node. | |
typeNode * | datatype () const |
Call base_type() with the argument true. | |
typeNode * | datatype_superior () const |
Call base_type() with the argument false. | |
virtual void | dataflow (FlowVal *v, FlowProblem &fp)=0 |
Run the dataflow analyzer. | |
virtual Node * | clone () const =0 |
Clone the input node. | |
Accessors | |
Methods to get and set fields in the class. | |
exprNode * | expr () const |
exprNode * | get_expr () |
void | expr (exprNode *expr) |
blockNode * | stmt () const |
blockNode * | get_stmt () |
void | stmt (blockNode *stmt) |
Accessors | |
Methods to get and set fields in the class. | |
string & | comment () |
FlowVal * | at_exit () const |
void | at_exit (FlowVal *ae) |
Accessors | |
Methods to get and set fields in the class. | |
NodeType | typ () const |
Get the node type. | |
Coord | coord () const |
Get the source location. | |
void | coord (const Coord coord) |
Set the source location. | |
bool | parenthesized () const |
Get the parenthesized boolean. | |
void | parenthesized (bool paren) |
Set the parenthesized boolean. | |
annote_list & | annotations () |
Get the annotations list. | |
FlowVal * | gen () const |
Get the "gen" flow value. | |
void | gen (FlowVal *g) |
Set the "gen" flow value. | |
FlowVal * | kill () const |
Get the "kill" flow value. | |
void | kill (FlowVal *k) |
Set the "kill" flow value. | |
AST traversal | |
These methods provide a uniform way to traverse the AST without explicitly testing the node types. They are all variations of the visitor design pattern. The input object is an instance of a user-defined subclass of Visitor, Walker or Changer. By overriding virtual methods, the user can define what to do at each kind of node that is encountered. See the C-Breeze documentation for more details. | |
virtual void | visit (Visitor *the_visitor)=0 |
Dispatch a Visitor. | |
virtual void | walk (Walker &the_walker)=0 |
Dispatch a Walker. | |
virtual Node * | change (Changer &the_changer, bool redispatch=false)=0 |
Dispatch a Changer. | |
Static Public Member Functions | |
static void | report () |
Report node count statistics. | |
Private Attributes | |
TREE exprNode * | _expr |
the selection expression | |
TREE blockNode * | _stmt |
the child statement |
This class provides a base class for all the control-flow selection statements. This includes the "if" statement, with and without an "else" and the "switch" statement. All three statements have a selection expression, and at least one child statement. For the if-else statements, we add another child statement to represent the false branch.
The NodeType is determined by the subclass (If or Switch).
Definition at line 4994 of file ast.h.
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Create a new selection statement. The new selection statement has the given type, selection expression and child statement. This constructor is only called by the selectionNode subclass.
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Destroy a selectionNode.
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Get the annotations list. This method returns a modifiable reference to the list of annotations on the node. Users can add new annotations, search for annotations, or remove annotations. Users are responsible for ensuring that every element of the annotation list points to a valid annotation. In particular, no element should be NULL.
Definition at line 274 of file ast.h. References Node::_annotations. |
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Reimplemented in basicblockNode. Definition at line 4291 of file ast.h. References stmtNode::_at_exit. |
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Reimplemented in basicblockNode. Definition at line 4290 of file ast.h. References stmtNode::_at_exit. |
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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.
Reimplemented in declNode, procNode, typeNode, tdefNode, exprNode, idNode, commaNode, callNode, blockNode, and exprstmtNode. |
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Dispatch a Changer. This abstract method works much the walker, but allows the tree to be changed.
Implemented in unitNode, declNode, subdeclNode, procNode, primNode, tdefNode, ptrNode, arrayNode, funcNode, structNode, unionNode, enumNode, suespecNode, constNode, idNode, binaryNode, unaryNode, castNode, commaNode, ternaryNode, callNode, initializerNode, blockNode, basicblockNode, exprstmtNode, labelNode, caseNode, ifNode, switchNode, whileNode, doNode, forNode, gotoNode, continueNode, breakNode, returnNode, attribNode, operandNode, conditiongotoNode, threeAddrNode, textNode, metaexprNode, and metastmtNode. |
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Clone the input node. This is not a "deep" clone, so be careful. For a deep clone, use the ref_clone_changer class.
Implemented in unitNode, declNode, subdeclNode, procNode, primNode, tdefNode, ptrNode, arrayNode, funcNode, structNode, unionNode, enumNode, suespecNode, constNode, idNode, binaryNode, unaryNode, castNode, commaNode, ternaryNode, callNode, initializerNode, blockNode, basicblockNode, exprstmtNode, labelNode, caseNode, ifNode, switchNode, whileNode, doNode, forNode, gotoNode, continueNode, breakNode, returnNode, attribNode, operandNode, conditiongotoNode, threeAddrNode, textNode, metaexprNode, and metastmtNode. Referenced by ref_clone_changer::at_node(). |
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Definition at line 4286 of file ast.h. References stmtNode::_comment. |
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Set the source location. This location should indicate the position in the source text that this Node represents, or Coord::Unknown if it does not represent any node in the source text. It is not common to set the source location of a node. Currently, only the compiler error messages actually make use of it.
Definition at line 243 of file ast.h. References Node::_coord. |
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Get the source location. The Coord class holds a location in the input source (file, line, position). During parsing, each AST node created records the position of the source text that it represents. However, subsequent phases may create or change nodes, so no guarantee is given about how the source location corresponds to the original source text.
Definition at line 230 of file ast.h. References Node::_coord. |
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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.
Implemented in unitNode, declNode, procNode, typeNode, constNode, idNode, binaryNode, unaryNode, castNode, commaNode, ternaryNode, callNode, initializerNode, blockNode, exprstmtNode, labelNode, caseNode, ifNode, switchNode, whileNode, doNode, forNode, gotoNode, continueNode, breakNode, returnNode, attribNode, operandNode, conditiongotoNode, threeAddrNode, textNode, metaexprNode, and metastmtNode. |
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Call base_type() with the argument true.
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Call base_type() with the argument false.
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Definition at line 5037 of file ast.h. References _expr. |
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Definition at line 5035 of file ast.h. References _expr. |
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Set the "gen" flow value. This value is used in dataflow analyses to store information that is generated at this node. Note that each node has exactly one "gen" flow value. In order to set the flow value to be empty, call this method with a value of NULL.
Definition at line 297 of file ast.h. References Node::_gen. |
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Get the "gen" flow value. This value is used in dataflow analyses to store information that is generated at this node. Note that each node has exactly one "gen" flow value.
Definition at line 284 of file ast.h. References Node::_gen. |
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Definition at line 5036 of file ast.h. References _expr. |
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Definition at line 5040 of file ast.h. References _stmt. Referenced by ifNode::get_true_br(). |
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Set the "kill" flow value. This value is used in dataflow analyses to store information that is killed at this node. Note that each node has exactly one "kill" flow value. To set the flow value to be empty, call this method with a value of NULL.
Definition at line 320 of file ast.h. References Node::_kill. |
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Get the "kill" flow value. This value is used in dataflow analyses to store information that is killed at this node. Note that each node has exactly one "kill" flow value.
Definition at line 307 of file ast.h. References Node::_kill. |
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Generate C code. Each subclass overrides this method to define how to produce the output C code. To use this method, pass an output_context and a null parent.
Implements Node. |
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Output a statement.
Implemented in blockNode, exprstmtNode, labelNode, caseNode, ifNode, switchNode, whileNode, doNode, forNode, gotoNode, continueNode, breakNode, returnNode, attribNode, conditiongotoNode, threeAddrNode, and metastmtNode. |
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Set the parenthesized boolean. This boolean determines whether this expression will be parenthesized in the output. Note that that the parentheses will always be added when they are needed to disambiguate the output. This variable only controls the use of "un-necessary" parentheses.
Definition at line 262 of file ast.h. References Node::_parenthesized. |
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Get the parenthesized boolean.
Definition at line 250 of file ast.h. References Node::_parenthesized. |
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Report node count statistics. The code can be configured to gather statistics about node usage according to type. This method prints the current state of that accounting information to standard out. |
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Definition at line 5041 of file ast.h. References _stmt. |
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Definition at line 5039 of file ast.h. References _stmt. Referenced by ifNode::true_br(). |
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Get the node type. This has nothing to do with types in the source code. It indicates what kind of AST node this is (e.g., a unary expression node or a while node).
Definition at line 216 of file ast.h. References Node::_typ. Referenced by gcWalker::delete_nodes(), and NodeInfo::nodeIndex(). |
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Return the node data type. This method returns the C data type of a node. Several different kinds of nodes contain typeNode pointers. This method is just a unified way to access them. It does not attempt to compute the type, it just returns whatever typeNode pointer resides on the node. The subclasses that have types return them, and the others return null.
Reimplemented in declNode, typeNode, exprNode, and operandNode. |
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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.
Implemented in unitNode, declNode, subdeclNode, procNode, primNode, tdefNode, ptrNode, arrayNode, funcNode, structNode, unionNode, enumNode, suespecNode, constNode, idNode, binaryNode, unaryNode, castNode, commaNode, ternaryNode, callNode, initializerNode, blockNode, basicblockNode, exprstmtNode, labelNode, caseNode, ifNode, switchNode, whileNode, doNode, forNode, gotoNode, continueNode, breakNode, returnNode, attribNode, operandNode, conditiongotoNode, threeAddrNode, textNode, metaexprNode, and metastmtNode. |
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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.
Implemented in unitNode, declNode, subdeclNode, procNode, primNode, tdefNode, ptrNode, arrayNode, funcNode, structNode, unionNode, enumNode, suespecNode, constNode, idNode, binaryNode, unaryNode, castNode, commaNode, ternaryNode, callNode, initializerNode, blockNode, basicblockNode, exprstmtNode, labelNode, caseNode, ifNode, switchNode, whileNode, doNode, forNode, gotoNode, continueNode, breakNode, returnNode, attribNode, operandNode, conditiongotoNode, threeAddrNode, textNode, metaexprNode, and metastmtNode. Referenced by gcWalker::at_binary(), sue_complete_walker::check(), and df_number_walker::number(). |
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the selection expression
Definition at line 5001 of file ast.h. Referenced by expr(), and get_expr(). |
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the child statement
Definition at line 5005 of file ast.h. Referenced by get_stmt(), and stmt(). |
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Definition at line 165 of file ast.h. Referenced by gcWalker::delete_nodes(). |
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Definition at line 168 of file ast.h. Referenced by gcWalker::at_binary(), and gcWalker::delete_nodes(). |
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Definition at line 162 of file ast.h. Referenced by gcWalker::delete_nodes(), and gcWalker::gcWalker(). |
Generated on February 1, 2006
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