gnu.expr

Class ThisExp

Implemented Interfaces:
Named, Printable

public class ThisExp
extends ReferenceExp

Evaluates to the "this" implicit variable. This is currently neither robust nor general. FIXME!

Field Summary

static String
THIS_NAME
Non-interned name for implicit 'this' variable.

Fields inherited from class gnu.expr.ReferenceExp

CREATE_FIELD_REFERENCE, DONT_DEREFERENCE, PREFER_BINDING2, PROCEDURE_NAME

Fields inherited from class gnu.expr.Expression

NEXT_AVAIL_FLAG, flags, noExpressions

Constructor Summary

ThisExp()
ThisExp(ClassType type)
ThisExp(Declaration binding)
ThisExp(ScopeExp context)

Method Summary

void
compile(Compilation comp, Target target)
Object
eval(Environment env)
ScopeExp
getContextScope()
Type
getType()
Return the Type used to represent the values of this Expression.
boolean
isForContext()
If this is being used to pass the context instance to a Macro.
static ThisExp
makeGivingContext(ScopeExp context)
protected Expression
walk(ExpWalker walker)

Methods inherited from class gnu.expr.ReferenceExp

compile, eval, getDontDereference, getType, isProcedureName, print, setDontDereference, setProcedureName, toString, walk

Methods inherited from class gnu.expr.AccessExp

contextDecl, getBinding, getName, getSymbol, setBinding, setContextDecl, string_name

Methods inherited from class gnu.expr.Expression

apply, apply0, compile, compile, compileButFirst, compileNotePosition, compileWithPosition, compileWithPosition, eval, eval, getColumn, getFile, getFlag, getFlags, getLine, getType, makeWhile, match0, print, print, printLineColumn, setFile, setFlag, setFlag, setLine, setLine, setLine, setLine, walk, walkChildren

Methods inherited from class gnu.mapping.Procedure0

apply0, apply1, apply2, apply3, apply4, applyN, numArgs

Methods inherited from class gnu.mapping.Procedure

apply, apply, apply0, apply1, apply2, apply3, apply4, applyN, check0, check1, check2, check3, check4, checkArgCount, checkN, getName, getProperty, getSetter, getSymbol, match0, match1, match2, match3, match4, matchN, maxArgs, minArgs, name, numArgs, removeProperty, set0, set1, setN, setName, setProperty, setProperty, setSetter, setSymbol, toString

Field Details

THIS_NAME

public static final String THIS_NAME
Non-interned name for implicit 'this' variable.

Constructor Details

ThisExp

public ThisExp()

ThisExp

public ThisExp(ClassType type)

ThisExp

public ThisExp(Declaration binding)

ThisExp

public ThisExp(ScopeExp context)

Method Details

compile

public void compile(Compilation comp,
                    Target target)
Overrides:
compile in interface ReferenceExp

eval

public Object eval(Environment env)
Overrides:
eval in interface ReferenceExp

getContextScope

public ScopeExp getContextScope()

getType

public final Type getType()
Return the Type used to represent the values of this Expression.
Overrides:
getType in interface ReferenceExp

isForContext

public final boolean isForContext()
If this is being used to pass the context instance to a Macro.

makeGivingContext

public static ThisExp makeGivingContext(ScopeExp context)

walk

protected Expression walk(ExpWalker walker)
Overrides:
walk in interface ReferenceExp