polyglot.ast
Class Eval_c

java.lang.Object
  extended by polyglot.ast.Node_c
      extended by polyglot.ast.Term_c
          extended by polyglot.ast.Stmt_c
              extended by polyglot.ast.Eval_c
All Implemented Interfaces:
java.lang.Cloneable, Eval, ForInit, ForUpdate, JL, Node, NodeOps, Stmt, Term, Copy

public class Eval_c
extends Stmt_c
implements Eval

An Eval is a wrapper for an expression in the context of a statement.


Field Summary
protected  Expr expr
           
 
Fields inherited from class polyglot.ast.Term_c
exceptions, reachable
 
Fields inherited from class polyglot.ast.Node_c
del, error, ext, position
 
Fields inherited from interface polyglot.ast.Term
ENTRY, EXIT
 
Fields inherited from interface polyglot.ast.Term
ENTRY, EXIT
 
Constructor Summary
Eval_c(Position pos, Expr expr)
           
 
Method Summary
 java.util.List acceptCFG(CFGBuilder v, java.util.List succs)
          Visit this term in evaluation order.
 Type childExpectedType(Expr child, AscriptionVisitor av)
          Get the expected type of a child expression of this.
 Node copy(NodeFactory nf)
          Produce a copy of this node using the given NodeFactory.
 Expr expr()
          Get the expression of the statement.
 Eval expr(Expr expr)
          Set the expression of the statement.
 Term firstChild()
          Return the first direct subterm performed when evaluating this term.
 void prettyPrint(CodeWriter w, PrettyPrinter tr)
          Write the statement to an output file.
protected  Eval_c reconstruct(Expr expr)
          Reconstruct the statement.
 java.lang.String toString()
           
 Node visitChildren(NodeVisitor v)
          Visit the children of the statement.
 
Methods inherited from class polyglot.ast.Term_c
exceptionCheck, exceptions, exceptions, listChild, reachable, reachable
 
Methods inherited from class polyglot.ast.Node_c
addDecls, buildTypes, buildTypesEnter, checkConstants, copy, copy, del, del, disambiguate, disambiguateEnter, disambiguateOverride, dump, dump, dump, enterChildScope, enterScope, error, error, exceptionCheckEnter, ext, ext, ext, ext, init, isDisambiguated, isTypeChecked, node, position, position, prettyPrint, prettyPrint, print, printBlock, printSubStmt, throwTypes, translate, typeCheck, typeCheckEnter, typeCheckOverride, visit, visitChild, visitEdge, visitList
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface polyglot.ast.Term
exceptions, exceptions, reachable, reachable
 
Methods inherited from interface polyglot.ast.Node
del, del, dump, error, error, ext, ext, ext, ext, isDisambiguated, isTypeChecked, position, position, visit, visitChild, visitEdge, visitList
 
Methods inherited from interface polyglot.ast.JL
init, node
 
Methods inherited from interface polyglot.ast.NodeOps
addDecls, buildTypes, buildTypesEnter, checkConstants, copy, disambiguate, disambiguateEnter, disambiguateOverride, dump, dump, enterChildScope, enterScope, exceptionCheck, exceptionCheckEnter, prettyPrint, prettyPrint, throwTypes, translate, typeCheck, typeCheckEnter, typeCheckOverride
 
Methods inherited from interface polyglot.ast.Term
exceptions, exceptions, reachable, reachable
 
Methods inherited from interface polyglot.ast.Node
del, del, dump, error, error, ext, ext, ext, ext, isDisambiguated, isTypeChecked, position, position, visit, visitChild, visitEdge, visitList
 
Methods inherited from interface polyglot.ast.JL
init, node
 
Methods inherited from interface polyglot.ast.NodeOps
addDecls, buildTypes, buildTypesEnter, checkConstants, copy, disambiguate, disambiguateEnter, disambiguateOverride, dump, dump, enterChildScope, enterScope, exceptionCheck, exceptionCheckEnter, prettyPrint, prettyPrint, throwTypes, translate, typeCheck, typeCheckEnter, typeCheckOverride
 

Field Detail

expr

protected Expr expr
Constructor Detail

Eval_c

public Eval_c(Position pos,
              Expr expr)
Method Detail

expr

public Expr expr()
Get the expression of the statement.

Specified by:
expr in interface Eval

expr

public Eval expr(Expr expr)
Set the expression of the statement.

Specified by:
expr in interface Eval

reconstruct

protected Eval_c reconstruct(Expr expr)
Reconstruct the statement.


childExpectedType

public Type childExpectedType(Expr child,
                              AscriptionVisitor av)
Description copied from interface: Node
Get the expected type of a child expression of this. The expected type is determined by the context in that the child occurs (e.g., for x = e, the expected type of e is the declared type of x. The expected type should impose the least constraints on the child's type that are allowed by the parent node.

Specified by:
childExpectedType in interface Node
Overrides:
childExpectedType in class Node_c
Parameters:
child - A child expression of this node.
av - An ascription visitor.
Returns:
The expected type of child.

visitChildren

public Node visitChildren(NodeVisitor v)
Visit the children of the statement.

Specified by:
visitChildren in interface NodeOps
Overrides:
visitChildren in class Node_c
Parameters:
v - The visitor that will traverse/rewrite the AST.
Returns:
A new AST if a change was made, or this.

toString

public java.lang.String toString()
Overrides:
toString in class Node_c

prettyPrint

public void prettyPrint(CodeWriter w,
                        PrettyPrinter tr)
Write the statement to an output file.

Specified by:
prettyPrint in interface NodeOps
Overrides:
prettyPrint in class Node_c
Parameters:
w - The code writer to which to write.
tr - The pretty printer. This is not a visitor.

firstChild

public Term firstChild()
Description copied from interface: Term
Return the first direct subterm performed when evaluating this term. If this term has no subterms, this should return null. This method is similar to the deprecated entry(), but it should *not* recursively drill down to the innermost subterm. The direct child visited first in this term's dataflow should be returned.

Specified by:
firstChild in interface Term

acceptCFG

public java.util.List acceptCFG(CFGBuilder v,
                                java.util.List succs)
Description copied from class: Term_c
Visit this term in evaluation order.

Specified by:
acceptCFG in interface Term
Specified by:
acceptCFG in class Term_c

copy

public Node copy(NodeFactory nf)
Description copied from interface: NodeOps
Produce a copy of this node using the given NodeFactory.

Specified by:
copy in interface NodeOps
Overrides:
copy in class Node_c