Package gnu.expr

Class ReferenceExp

java.lang.Object

gnu.mapping.PropertySet

gnu.mapping.Procedure

gnu.expr.Expression

gnu.expr.AccessExp

gnu.expr.ReferenceExp

All Implemented Interfaces:

gnu.kawa.format.Printable, Named, SourceLocator, SourceLocator, Locator

Direct Known Subclasses:

ThisExp

public class ReferenceExp
extends AccessExp

This class represents a variable reference (an identifier).

Nested Class Summary

Nested classes/interfaces inherited from interface gnu.text.SourceLocator

SourceLocator.Simple

Field Summary

Fields

Modifier and Type	Field	Description
static int	ALLOCATE_ON_STACK_LAST
static int	DONT_DEREFERENCE
static int	PROCEDURE_NAME
static int	TYPE_NAME	Flag indicates a reference to a type name.

Fields inherited from class gnu.expr.AccessExp

NEXT_AVAIL_FLAG, PREFER_BINDING2

Fields inherited from class gnu.expr.Expression

applyMethodExpression, flags, noExpressions, type, VALIDATED

Fields inherited from class gnu.mapping.Procedure

applyMethodType, applyToConsumerDefault, applyToConsumerMethod, applyToObjectDefault, applyToObjectMethod, compilerKey, compilerXKey, inlineIfConstantSymbol, validateApplyKey, validateXApplyKey

Fields inherited from class gnu.mapping.PropertySet

nameKey

Constructor Summary

Constructors

Constructor	Description
ReferenceExp(Declaration binding)
ReferenceExp(ReferenceExp old)
ReferenceExp(Object symbol)
ReferenceExp(Object symbol, Declaration binding)

Method Summary

Modifier and Type	Method	Description
void	apply(CallContext ctx)	Evaluate the expression.
protected Type	calculateType()
void	compile(Compilation comp, Target target)
protected Expression	deepCopy(IdentityHashTable mapper)
boolean	getDontDereference()
boolean	isProcedureName()	True if this identifier appears in "function call position".
boolean	isSingleValue()
boolean	isUnknown()
protected boolean	mustCompile()
void	print(gnu.kawa.io.OutPort ps)
void	setDontDereference(boolean setting)
void	setProcedureName(boolean setting)	Note if this identifier appears in "function call position".
boolean	side_effects()	True if evaluating may have side-effects.
String	toString()
Expression	validateApply(ApplyExp exp, InlineCalls visitor, Type required, Declaration decl)	Apply inlining transformations on a given ApplyExp.
Object	valueIfConstant()	Return value if it is constant, or null if non-constant or unknown.
protected <R,D> R	visit(ExpVisitor<R,D> visitor, D d)

Methods inherited from class gnu.expr.AccessExp

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

Methods inherited from class gnu.expr.Expression

applyMethodExpression, checkLiteralKeyword, compile, compile, compileWithPosition, compileWithPosition, deepCopy, deepCopy, deepCopy, eval, eval, getColumnNumber, getEndColumn, getEndLine, getFileName, getFlag, getFlags, getLineNumber, getPublicId, getStartColumn, getStartLine, getSystemId, getType, getTypeRaw, isStableSourceLocation, makeWhile, maybeSetLine, neverReturns, numArgs, print, printLineColumn, setFile, setFlag, setFlag, setLine, setLine, setLine, setLine, setLine, setLocation, setType, visitChildren

Methods inherited from class gnu.mapping.Procedure

apply0, apply1, apply2, apply3, apply4, applyL, applyN, applyToConsumerDefault, applyToObjectDefault, checkArgCount, checkBadCode, getApplyMethod, getApplyToConsumerMethod, getApplyToObjectMethod, getReturnType, getSetter, getSourceLocation, isSideEffectFree, lookupApplyHandle, maxArgs, maxArgs, minArgs, minArgs, set0, set1, setN, setSetter, setSourceLocation

Methods inherited from class gnu.mapping.PropertySet

getProperty, removeProperty, setName, setProperty, setProperty, 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

TYPE_NAME

public static final int TYPE_NAME

Flag indicates a reference to a type name.

See Also:

Constant Field Values

ALLOCATE_ON_STACK_LAST

public static final int ALLOCATE_ON_STACK_LAST

See Also:

Constant Field Values

Constructor Detail

ReferenceExp

public ReferenceExp(Object symbol)

ReferenceExp

public ReferenceExp(Object symbol,
                    Declaration binding)

ReferenceExp

public ReferenceExp(Declaration binding)

ReferenceExp

public ReferenceExp(ReferenceExp old)

Method Detail

getDontDereference

public final boolean getDontDereference()

setDontDereference

public final void setDontDereference(boolean setting)

isUnknown

public final boolean isUnknown()

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".

mustCompile

protected boolean mustCompile()

Specified by:

mustCompile in class Expression

valueIfConstant

public final Object valueIfConstant()

Description copied from class: Expression

Return value if it is constant, or null if non-constant or unknown.

Overrides:

valueIfConstant in class Expression

apply

public void apply(CallContext ctx)
           throws Throwable

Description copied from class: Expression

Evaluate the expression. This is named apply rather than eval so it is compatible with the full-tail-call calling convention, and we can stash an Expression in CallContext's proc field. FIXME - are we making use of this?

Overrides:

apply in class Expression

Throws:

Throwable

compile

public void compile(Compilation comp,
                    Target target)

Specified by:

compile in class Expression

deepCopy

protected Expression deepCopy(IdentityHashTable mapper)

Overrides:

deepCopy in class Expression

visit

protected <R,D> R visit(ExpVisitor<R,D> visitor,
                              D d)

Overrides:

visit in class Expression

validateApply

public Expression validateApply(ApplyExp exp,
                                InlineCalls visitor,
                                Type required,
                                Declaration decl)

Description copied from class: Expression

Apply inlining transformations on a given ApplyExp. Assumes the ApplyExp's function is this expression, or can be optimized to this expression.

Overrides:

validateApply in class Expression

Parameters:

exp - an application whose function expression can be simplified to this expression.

visitor - the context for the current inlining pass

decl - if non-null, a Declaration bound to this expression.

Returns:

an Expression equivalent to the passed-in exp.

print

public void print(gnu.kawa.io.OutPort ps)

Specified by:

print in class Expression

calculateType

protected Type calculateType()

Overrides:

calculateType in class Expression

isSingleValue

public boolean isSingleValue()

Overrides:

isSingleValue in class Expression

side_effects

public boolean side_effects()

Description copied from class: Expression

True if evaluating may have side-effects.

Overrides:

side_effects in class Expression

toString

public String toString()

Overrides:

toString in class Expression