gnu.expr
Class ReferenceExp

java.lang.Object
  gnu.mapping.Procedure
      gnu.mapping.Procedure0
          gnu.expr.Expression
              gnu.expr.AccessExp
                  gnu.expr.ReferenceExp

All Implemented Interfaces:

Named, Printable

Direct Known Subclasses:

ThisExp

public class ReferenceExp
extends AccessExp

This class represents a variable reference (an identifier).

Field Summary

static int	CREATE_FIELD_REFERENCE Create a FieldLocation referencing the binding.
static int	DONT_DEREFERENCE
static int	PREFER_BINDING2
static int	PROCEDURE_NAME

Fields inherited from class gnu.expr.Expression

flags, NEXT_AVAIL_FLAG, noExpressions

Constructor Summary

ReferenceExp(Declaration binding)

ReferenceExp(java.lang.Object symbol)

ReferenceExp(java.lang.Object symbol, Declaration binding)

Method Summary

void	compile(Compilation comp, Target target)
java.lang.Object	eval(Environment env)
boolean	getDontDereference()
Type	getType() Return the Type used to represent the values of this Expression.
boolean	isProcedureName() True if this identifier appears in "function call position".
void	print(OutPort ps)
void	setDontDereference(boolean setting)
void	setProcedureName(boolean setting) Note if this identifier appears in "function call position".
java.lang.String	toString()
protected Expression	walk(ExpWalker walker)

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, compileButFirst, compileNotePosition, compileWithPosition, compileWithPosition, eval, getColumn, getFile, getFlag, getFlags, getLine, makeWhile, match0, print, printLineColumn, setFile, setFlag, setFlag, setLine, setLine, setLine, setLine, walkChildren

Methods inherited from class gnu.mapping.Procedure0

apply1, apply2, apply3, apply4, applyN, numArgs

Methods inherited from class gnu.mapping.Procedure

apply, check0, check1, check2, check3, check4, checkArgCount, checkN, getProperty, getSetter, match1, match2, match3, match4, matchN, maxArgs, minArgs, name, removeProperty, set0, set1, setN, setName, setProperty, setProperty, setSetter, setSymbol

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

DONT_DEREFERENCE

public static final int DONT_DEREFERENCE

See Also:

Constant Field Values

PROCEDURE_NAME

public static final int PROCEDURE_NAME

See Also:

Constant Field Values

PREFER_BINDING2

public static final int PREFER_BINDING2

See Also:

Constant Field Values

CREATE_FIELD_REFERENCE

public static final int CREATE_FIELD_REFERENCE

Create a FieldLocation referencing the binding.

See Also:

Constant Field Values

Constructor Detail

ReferenceExp

public ReferenceExp(java.lang.Object symbol)

ReferenceExp

public ReferenceExp(java.lang.Object symbol,
                    Declaration binding)

ReferenceExp

public ReferenceExp(Declaration binding)

Method Detail

getDontDereference

public final boolean getDontDereference()

setDontDereference

public final void setDontDereference(boolean setting)

isProcedureName

public final boolean isProcedureName()

True if this identifier appears in "function call position". If so, it should be interpreted as a function name, which makes a difference for languages (like Common Lisp) that have two name spaces.

setProcedureName

public final void setProcedureName(boolean setting)

Note if this identifier appears in "function call position".

eval

public java.lang.Object eval(Environment env)

Overrides:

eval in class Expression

compile

public void compile(Compilation comp,
                    Target target)

Specified by:

compile in class Expression

walk

protected Expression walk(ExpWalker walker)

Overrides:

walk in class Expression

print

public void print(OutPort ps)

Specified by:

print in class Expression

getType

public Type getType()

Description copied from class: Expression

Return the Type used to represent the values of this Expression.

Overrides:

getType in class Expression

toString

public java.lang.String toString()

Overrides:

toString in class Procedure