polyglot.ext.jl.ast
Class Conditional_c

java.lang.Object
  polyglot.ext.jl.ast.Node_c
      polyglot.ext.jl.ast.Term_c
          polyglot.ext.jl.ast.Expr_c
              polyglot.ext.jl.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.ext.jl.ast.Expr_c

type

Fields inherited from class polyglot.ext.jl.ast.Term_c

exceptions, reachable

Fields inherited from class polyglot.ext.jl.ast.Node_c

del, ext, position

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.
Term	entry() Return the first (sub)term 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.ext.jl.ast.Expr_c

booleanValue, buildTypes, byteValue, charValue, doubleValue, dump, floatValue, intValue, longValue, printSubExpr, printSubExpr, shortValue, stringValue, type, type

Methods inherited from class polyglot.ext.jl.ast.Term_c

exceptionCheck, exceptions, exceptions, listEntry, reachable, reachable

Methods inherited from class polyglot.ext.jl.ast.Node_c

addDecls, addMembers, addMembersEnter, addMembersOverride, buildTypesEnter, buildTypesOverride, copy, del, del, disambiguate, disambiguateEnter, disambiguateOverride, enterScope, enterScope, exceptionCheckEnter, exceptionCheckOverride, ext, ext, ext, ext, init, node, position, position, 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

printSubExpr, printSubExpr, type

Methods inherited from interface polyglot.ast.Node

del, del, dump, ext, ext, ext, ext, position, position, visit, visitChild, visitEdge, visitList

Methods inherited from interface polyglot.ast.JL

init, node

Methods inherited from interface polyglot.ast.NodeOps

addDecls, addMembers, addMembersEnter, buildTypes, buildTypesEnter, disambiguate, disambiguateEnter, enterScope, enterScope, exceptionCheck, exceptionCheckEnter, throwTypes, translate, typeCheckEnter

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.

entry

public Term entry()

Description copied from class: Term_c

Return the first (sub)term performed when evaluating this term.

Specified by:

entry in interface Term

Specified by:

entry in class Term_c

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