polyglot.ast
Class Eval_c

java.lang.Object
  polyglot.ast.Node_c
      polyglot.ast.Term_c
          polyglot.ast.Stmt_c
              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