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commaNode Class ReferenceComma-separated expressions.
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Garbage collection. | |
bool | mark |
static node_list | nodes |
static map< Node *, bool > | deleted_nodes |
Public Member Functions | |
commaNode (expr_list *exprs, const Coord coord=Coord::Unknown) | |
Create a new comma expression. | |
commaNode (const Coord coord=Coord::Unknown) | |
Create an empty comma expression. | |
virtual | ~commaNode () |
Destroy a commaNode. | |
typeNode * | base_type (bool TdefIndir) const |
Return the base data type of a node. | |
virtual void | eval () |
Constant expression evaluator. | |
virtual void | dataflow (FlowVal *v, FlowProblem &fp) |
Run the dataflow analyzer. | |
virtual Node * | clone () const |
Clone the input node. | |
virtual void | output_expr (output_context &ct, Node *par, int prec, Assoc assoc) |
Output a expression. | |
virtual int | precedence (Assoc &assoc) |
Associativity and precedence. | |
virtual bool | is_lvalue () |
Is l-value. | |
typeNode * | no_tdef_type () |
virtual void | output (output_context &ct, Node *par) |
Generate C code. | |
bool | parens (int outer_prec, Assoc outer_assoc) |
Determine if parenthesis are needed. | |
typeNode * | datatype () const |
Call base_type() with the argument true. | |
typeNode * | datatype_superior () const |
Call base_type() with the argument false. | |
Accessors | |
Methods to get and set fields in the class. | |
expr_list & | exprs () |
const expr_list & | exprs () const |
AST Traversal | |
virtual void | visit (Visitor *the_visitor) |
Dispatch a Visitor. | |
virtual void | walk (Walker &the_walker) |
Dispatch a Walker. | |
virtual Node * | change (Changer &the_changer, bool redispatch=false) |
Dispatch a Changer. | |
Accessors | |
Methods to get and set fields in the class. | |
virtual typeNode * | type () const |
Return the node data type. | |
virtual void | type (typeNode *type) |
typeNode * | get_type () |
const constant & | value () const |
constant & | value () |
void | value (const constant &newval) |
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. | |
Static Public Member Functions | |
static exprNode * | integral_promotions (exprNode *old_expr) |
Add integral promotions. | |
static pair< exprNode *, exprNode * > | usual_arithmetic_conversions (exprNode *left, exprNode *right) |
Usual arithmetic conversions. | |
static void | report () |
Report node count statistics. | |
Private Attributes | |
TREE expr_list | _exprs |
The comma-separated expressions. |
This class represents a comma-separated list of expressions. Rather than represent the comma operator as a binary expression, we gather together a series of commas and put them in a single node.
The NodeType is Comma.
Definition at line 3848 of file ast.h.
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Create a new comma expression. The new comma node has the given list of expressions. The elements are removed from the list and the list is destroyed.
Referenced by clone(). |
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Create an empty comma expression. The new comma node has no expressions initially. They can be added by modifying the _exprs list.
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Destroy a commaNode.
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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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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 from exprNode. |
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Dispatch a Changer. This abstract method works much the walker, but allows the tree to be changed.
Implements Node. |
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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.
Implements Node. Definition at line 3922 of file ast.h. References commaNode(). |
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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.
Implements Node. |
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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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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. Implements exprNode. |
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Definition at line 3893 of file ast.h. References _exprs. |
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Definition at line 3892 of file ast.h. References _exprs. |
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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 3178 of file ast.h. References exprNode::_type. |
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Add integral promotions. This method takes an expression and calls typeNode::integral_promotions() on its type to determine if any apply. If they do, it inserts an implicit castNode above the input expression that represents this implicit conversion.
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Is l-value. Indicates if the expression is an l-value (that is, the left side of an assignment).
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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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Definition at line 3226 of file ast.h. References exprNode::type(). |
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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 expression.
Implements exprNode. |
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Determine if parenthesis are needed. This method takes the associativity and precedence values of the enclosing expression and determines if parentheses are needed.
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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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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.
Reimplemented from exprNode. |
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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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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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Reimplemented in operandNode. Definition at line 3179 of file ast.h. References exprNode::_type. |
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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 from Node. Reimplemented in operandNode. Definition at line 3177 of file ast.h. References exprNode::_type. Referenced by tree_visitor::at_const(), exprNode::no_tdef_type(), and constNode::usual_unary_conversion_type(). |
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Usual arithmetic conversions. This method takes two expressions and adds any casts that are necessary to make them compatible for arithmetic operations. It calls typeNode::usual_arithmetic_conversions(), passing the types of the expressions, to determine when the casts are needed. It inserts implicit castNode objects above the expressions for the casts.
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Definition at line 3183 of file ast.h. References exprNode::_value. |
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Definition at line 3182 of file ast.h. References exprNode::_value. |
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Definition at line 3181 of file ast.h. References exprNode::_value. |
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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.
Implements Node. |
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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.
Implements Node. |
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The comma-separated expressions. The expression in this list are in the order they appeared in the source. Definition at line 3858 of file ast.h. Referenced by exprs(). |
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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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