gnu.expr

Class SetExp

java.lang.Object

gnu.mapping.PropertySet

gnu.mapping.Procedure

gnu.expr.Expression

gnu.expr.AccessExp

gnu.expr.SetExp

All Implemented Interfaces:

gnu.kawa.format.Printable, Named, javax.xml.transform.SourceLocator, org.xml.sax.Locator

public class SetExp
extends AccessExp

An Expression to set (bind) or define a new value to a named variable.

Nested Class Summary

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

SourceLocator.Simple

Field Summary

Fields

Modifier and Type	Field and Description
static int	BAD_SHORT "Failure" return value of canUseInc.
static int	DEFINING_FLAG
static int	GLOBAL_FLAG
static int	HAS_VALUE
static int	PROCEDURE
static int	SET_IF_UNBOUND

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 and Description
SetExp(Declaration decl, Expression val)
SetExp(java.lang.Object symbol, Expression val)

Method Summary

Modifier and Type	Method and Description
void	apply(CallContext ctx) Evaluate the expression.
protected Type	calculateType()
static int	canUseInc(Expression rhs, Declaration target)
void	compile(Compilation comp, Target target)
boolean	getHasValue() True if evaluating the SetExp yields the value of the RHS.
Expression	getNewValue() Get the Expression for calculating the new ("right-hand") value.
boolean	isDefining()
boolean	isFuncDef() True if this is a functon definition ("defun").
boolean	isSetIfUnbound()
static SetExp	makeDefinition(Declaration decl, Expression val)
static SetExp	makeDefinition(java.lang.Object symbol, Expression val)
protected boolean	mustCompile()
void	print(gnu.kawa.io.OutPort out)
void	setDefining(boolean value)
void	setFuncDef(boolean value)
void	setHasValue(boolean value)
void	setNewValue(Expression newValue)
void	setSetIfUnbound(boolean value)
java.lang.String	toString()
protected <R,D> R	visit(ExpVisitor<R,D> visitor, D d)
protected <R,D> void	visitChildren(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, deepCopy, eval, eval, getColumnNumber, getEndColumn, getEndLine, getFileName, getFlag, getFlags, getLineNumber, getPublicId, getStartColumn, getStartLine, getSystemId, getType, getTypeRaw, isSingleValue, isStableSourceLocation, makeWhile, maybeSetLine, neverReturns, numArgs, print, printLineColumn, setFile, setFlag, setFlag, setLine, setLine, setLine, setLine, setLine, setLocation, setType, side_effects, validateApply, valueIfConstant

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

DEFINING_FLAG

public static final int DEFINING_FLAG

See Also:

Constant Field Values

GLOBAL_FLAG

public static final int GLOBAL_FLAG

See Also:

Constant Field Values

PROCEDURE

public static final int PROCEDURE

See Also:

Constant Field Values

SET_IF_UNBOUND

public static final int SET_IF_UNBOUND

See Also:

Constant Field Values

HAS_VALUE

public static final int HAS_VALUE

See Also:

Constant Field Values

BAD_SHORT

public static final int BAD_SHORT

"Failure" return value of canUseInc.

See Also:

Constant Field Values

Constructor Detail

SetExp

public SetExp(java.lang.Object symbol,
              Expression val)

SetExp

public SetExp(Declaration decl,
              Expression val)

Method Detail

makeDefinition

public static SetExp makeDefinition(java.lang.Object symbol,
                                    Expression val)

makeDefinition

public static SetExp makeDefinition(Declaration decl,
                                    Expression val)

getNewValue

public final Expression getNewValue()

Get the Expression for calculating the new ("right-hand") value.

setNewValue

public void setNewValue(Expression newValue)

isDefining

public final boolean isDefining()

setDefining

public final void setDefining(boolean value)

getHasValue

public final boolean getHasValue()

True if evaluating the SetExp yields the value of the RHS.

setHasValue

public final void setHasValue(boolean value)

isFuncDef

public final boolean isFuncDef()

True if this is a functon definition ("defun").

setFuncDef

public final void setFuncDef(boolean value)

isSetIfUnbound

public final boolean isSetIfUnbound()

setSetIfUnbound

public final void setSetIfUnbound(boolean value)

mustCompile

protected boolean mustCompile()

Specified by:

mustCompile in class Expression

apply

public void apply(CallContext ctx)
           throws java.lang.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:

java.lang.Throwable

compile

public void compile(Compilation comp,
                    Target target)

Specified by:

compile in class Expression

canUseInc

public static int canUseInc(Expression rhs,
                            Declaration target)

calculateType

protected final Type calculateType()

Overrides:

calculateType in class Expression

visit

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

Overrides:

visit in class Expression

visitChildren

protected <R,D> void visitChildren(ExpVisitor<R,D> visitor,
                                   D d)

Overrides:

visitChildren in class Expression

print

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

Specified by:

print in class Expression

toString

public java.lang.String toString()

Overrides:

toString in class Expression