polyglot.ext.jl.ast
Class NullLit_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.Lit_c
                  polyglot.ext.jl.ast.NullLit_c

All Implemented Interfaces:

java.lang.Cloneable, Expr, JL, Lit, Node, NodeOps, NullLit, Prefix, Receiver, Term, Typed, Copy

public class NullLit_c
extends Lit_c
implements NullLit

The Java literal null.

Field Summary

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

NullLit_c(Position pos)

Method Summary

java.lang.Object	constantValue() Returns the constant value of the expression, if any.
java.lang.Object	objValue() Get the value of the expression, as an object.
void	prettyPrint(CodeWriter w, PrettyPrinter tr) Write the expression to an output file.
java.lang.String	toString()
Node	typeCheck(TypeChecker tc) Type check the expression.

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

acceptCFG, entry, isConstant, precedence

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, childExpectedType, 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, visitChildren, 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

isConstant, precedence, printSubExpr, printSubExpr, type

Methods inherited from interface polyglot.ast.Node

childExpectedType, 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, visitChildren

Methods inherited from interface polyglot.util.Copy

copy

Methods inherited from interface polyglot.ast.Typed

type

Methods inherited from interface polyglot.ast.Term

acceptCFG, entry, exceptions, exceptions, reachable, reachable

Constructor Detail

NullLit_c

public NullLit_c(Position pos)

Method Detail

typeCheck

public Node typeCheck(TypeChecker tc)

Type check the expression.

Specified by:

typeCheck in interface NodeOps

Overrides:

typeCheck in class Node_c

Parameters:

tc - The type checking visitor.

objValue

public java.lang.Object objValue()

Get the value of the expression, as an object.

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.

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

Specified by:

constantValue in class Lit_c