polyglot.ast
Class Conditional_c

java.lang.Object
  extended by polyglot.ast.Node_c
      extended by polyglot.ast.Term_c
          extended by polyglot.ast.Expr_c
              extended by polyglot.ast.Conditional_c
All Implemented Interfaces:
java.lang.Cloneable, Conditional, Expr, JL, Node, NodeOps, Prefix, Receiver, Term, Typed, Copy

public class Conditional_c
extends Expr_c
implements Conditional

A Conditional is a representation of a Java ternary expression. That is, (cond ? consequent : alternative).


Field Summary
protected  Expr alternative
           
protected  Expr cond
           
protected  Expr consequent
           
 
Fields inherited from class polyglot.ast.Expr_c
type
 
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
 
Constructor Summary
Conditional_c(Position pos, Expr cond, Expr consequent, Expr alternative)
           
 
Method Summary
 java.util.List acceptCFG(CFGBuilder v, java.util.List succs)
          Visit this term in evaluation order.
 Expr alternative()
          Get the alternative of the expression.
 Conditional alternative(Expr alternative)
          Set the alternative of the expression.
 Type childExpectedType(Expr child, AscriptionVisitor av)
          Get the expected type of a child expression of this.
 Expr cond()
          Get the conditional of the expression.
 Conditional cond(Expr cond)
          Set the conditional of the expression.
 Expr consequent()
          Get the consequent of the expression.
 Conditional consequent(Expr consequent)
          Set the consequent of the expression.
 java.lang.Object constantValue()
          Returns the constant value of the expression, if any.
 Node copy(NodeFactory nf)
          Produce a copy of this node using the given NodeFactory.
 Term firstChild()
          Return the first direct subterm performed when evaluating this term.
 boolean isConstant()
          Return whether the expression evaluates to a constant.
 Precedence precedence()
          Get the precedence of the expression.
 void prettyPrint(CodeWriter w, PrettyPrinter tr)
          Write the expression to an output file.
protected  Conditional_c reconstruct(Expr cond, Expr consequent, Expr alternative)
          Reconstruct the expression.
 java.lang.String toString()
           
 Node typeCheck(TypeChecker tc)
          Type check the expression.
 Node visitChildren(NodeVisitor v)
          Visit the children of the expression.
 
Methods inherited from class polyglot.ast.Expr_c
booleanValue, buildTypes, byteValue, charValue, constantValueSet, doubleValue, dump, floatValue, intValue, isTypeChecked, longValue, printSubExpr, printSubExpr, shortValue, stringValue, type, type
 
Methods inherited from class polyglot.ast.Term_c
exceptionCheck, exceptions, exceptions, listChild, reachable, reachable
 
Methods inherited from class polyglot.ast.Node_c
addDecls, buildTypesEnter, checkConstants, copy, copy, del, del, disambiguate, disambiguateEnter, disambiguateOverride, dump, dump, enterChildScope, enterScope, error, error, exceptionCheckEnter, ext, ext, ext, ext, init, isDisambiguated, node, position, position, prettyPrint, prettyPrint, print, printBlock, printSubStmt, throwTypes, translate, 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.Expr
constantValueSet, printSubExpr, printSubExpr, type
 
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, typeCheckEnter, typeCheckOverride
 
Methods inherited from interface polyglot.util.Copy
copy
 
Methods inherited from interface polyglot.ast.Typed
type
 
Methods inherited from interface polyglot.ast.Term
exceptions, exceptions, reachable, reachable
 

Field Detail

cond

protected Expr cond

consequent

protected Expr consequent

alternative

protected Expr alternative
Constructor Detail

Conditional_c

public Conditional_c(Position pos,
                     Expr cond,
                     Expr consequent,
                     Expr alternative)
Method Detail

precedence

public Precedence precedence()
Get the precedence of the expression.

Specified by:
precedence in interface Expr
Overrides:
precedence in class Expr_c

cond

public Expr cond()
Get the conditional of the expression.

Specified by:
cond in interface Conditional

cond

public Conditional cond(Expr cond)
Set the conditional of the expression.

Specified by:
cond in interface Conditional

consequent

public Expr consequent()
Get the consequent of the expression.

Specified by:
consequent in interface Conditional

consequent

public Conditional consequent(Expr consequent)
Set the consequent of the expression.

Specified by:
consequent in interface Conditional

alternative

public Expr alternative()
Get the alternative of the expression.

Specified by:
alternative in interface Conditional

alternative

public Conditional alternative(Expr alternative)
Set the alternative of the expression.

Specified by:
alternative in interface Conditional

reconstruct

protected Conditional_c reconstruct(Expr cond,
                                    Expr consequent,
                                    Expr alternative)
Reconstruct the expression.


visitChildren

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

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.

typeCheck

public Node typeCheck(TypeChecker tc)
               throws SemanticException
Type check the expression.

Specified by:
typeCheck in interface NodeOps
Overrides:
typeCheck in class Node_c
Parameters:
tc - The type checking visitor.
Throws:
SemanticException

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.

toString

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

prettyPrint

public void prettyPrint(CodeWriter w,
                        PrettyPrinter tr)
Write the expression 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

isConstant

public boolean isConstant()
Description copied from interface: Expr
Return whether the expression evaluates to a constant. This is not valid until after disambiguation.

Specified by:
isConstant in interface Expr
Overrides:
isConstant in class Expr_c

constantValue

public java.lang.Object constantValue()
Description copied from interface: Expr
Returns the constant value of the expression, if any.

Specified by:
constantValue in interface Expr
Overrides:
constantValue in class Expr_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