gnu.mapping

Class Values

public class Values extends TreeList implements Printable, Externalizable

Encapsulate multiple values in a single object. In Scheme and Lisp mainly used to return multiple values from a function.

Field Summary
static Values	empty
static Object[]	noArgs

Constructor Summary
	Values()
	Values(Object[] values) Constructor.

Method Summary
Object	call_with(Procedure proc) Apply a Procedure with these values as the arguments.
Object	canonicalize() If a simple value, return that value.
static int	countValues(Object value)
Object[]	getValues() Get the values encapsulated.
static Values	make()
static Object	make(Object[] vals)
static Object	make(Sequence seq)
static Object	make(TreeList list)
static Object	make(TreeList list, int startPosition, int endPosition)
static int	nextIndex(Object values, int curIndex) Helper method called by code using a SeriesTarget.
static Object	nextValue(Object values, int curIndex) Helper method called by code using a SeriesTarget.
void	print(Consumer out)
void	readExternal(ObjectInput in)
Object	readResolve()
static Object	values$V(Object[] vals)
void	writeExternal(ObjectOutput out)
static void	writeValues(Object value, Consumer out)

Field Detail

Constructor Detail

Values

public Values(Object[] values)

Constructor.

Parameters: values the values to encapulate

Method Detail

call_with

public Object call_with(Procedure proc)

Apply a Procedure with these values as the arguments.

canonicalize

public final Object canonicalize()

If a simple value, return that value. Also, if no values, return empty.

countValues

public static int countValues(Object value)

getValues

public Object[] getValues()

Get the values encapsulated.

make

public static Object make(Object[] vals)

make

public static Object make(TreeList list)

make

public static Object make(TreeList list, int startPosition, int endPosition)

nextIndex

public static int nextIndex(Object values, int curIndex)

Helper method called by code using a SeriesTarget. The compiled code iterates through zero or more values. Return the index of the next value, or -1 if currently at eof. A non-Values object is treated as a singleton value, so in that case there is no next value.

nextValue

public static Object nextValue(Object values, int curIndex)

Helper method called by code using a SeriesTarget. The compiled code iterates through zero or more values. Extract the object referenced by the curIndex. A non-Values object is treated as a singleton value.

print

public void print(Consumer out)

readExternal

public void readExternal(ObjectInput in)

readResolve

public Object readResolve()

values$V

public static Object values$V(Object[] vals)

writeExternal

public void writeExternal(ObjectOutput out)

Serial Data: Write the length (using writeInt), followed by the values in order (written using writeObject).

writeValues

public static void writeValues(Object value, Consumer out)