org.holtz.zoe
Enum Operator

java.lang.Object
  java.lang.Enum<Operator>
      org.holtz.zoe.Operator

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<Operator>

public enum Operator
extends java.lang.Enum<Operator>

The verb of an Operation in a Zoel program.

Author:

Brian Holtz

Enum Constant Summary

AbsoluteVal

Add

And

Barf
Barf up some energy to leave at the current location.

Bite
Bite energy from the nearest ZObject.

Call
Branch to the indicated Statement, and return at the end of its StatementList or when it Returns.

Divide

Else
If stack top is false (zero/empty), evaluate arg.

Equals

Feel
Sense the nearest ZObject within MaxBiteRange and mass > InvisibilityThreshold * own mass.

Get
Copy a heap value to the stack, where arg is the map key.

GreaterThan

IfThen
If stack top is true (nonzero/nonempty), evaluate arg.

LessThan

Look
Sense the nearest ZObject within MaxLookRange and mass > InvisibilityThreshold * own mass.

Mate
Exchange genes with the nearest visible bug that is within Feel range.

Modulus

Mood
Copy the arg (or stack top) to the Mood register.

Move
Move forward along $Heading.

Multiply

Negate

Not

Or

Poke
Set the top of the stack.

Pop
Pop the top off the stack.

Pray
Send a message to the gods.

Push
Push the arg onto the stack.

Random

Return
Return to the Statement after the corresponding Call, or break from the enclosing While.

Set
Set a mapping in the heap, where arg is the map key and the stack top is the value.

Spawn
Attempt to spawn a child using only available strength.

Split
Attempt to split into a parent and child of equal size and strength.

Subtract

Turn
Turn to a different direction in order to Move that way.

While
While stack top is true (nonzero/nonempty), evaluate arg.

Method Summary

static Operator	fromString(java.lang.String str)
static Operator	pseudoRandom(java.util.Random random)
static Operator	random(java.util.Random random)
static Operator	valueOf(java.lang.String name) Returns the enum constant of this type with the specified name.
static Operator[]	values() Returns an array containing the constants of this enum type, in the order they are declared.
ZoelVM.Turn	whetherTurnContinues()

Methods inherited from class java.lang.Enum

compareTo, equals, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

Move

public static final Operator Move

Move forward along $Heading. If no arg, arg = 1.0. If 0 <= arg <= 2, arg is speed. Energy cost is proportional to speed ^ 2.

Turn

public static final Operator Turn

Turn to a different direction in order to Move that way. Arg can be $Toward or $Away from last-sensed ZObject. If no arg, arg is $Toward. $$Bearing is (other.heading - this.heading), so Turn $$Bearing follows other. If -2 PI <= arg <= 2 PI, arg is radians. Else, if -180 <= arg <= 180, arg is degrees.

Bite

public static final Operator Bite

Bite energy from the nearest ZObject.

Barf

public static final Operator Barf

Barf up some energy to leave at the current location. If no arg, arg = 1.0. If 0 <= arg <= 1.0, arg is fraction of current bite size.

Spawn

public static final Operator Spawn

Attempt to spawn a child using only available strength.

• If arg >= 1, the strength to invest is arg times a max-strength min-size bug.
• If 0 <= arg < 1, the strength to invest is arg times the mother's current max strength.

A child is only created if

1. she would have at least the mass-energy of a max-strength min-size bug, and the mother would be left with strength >= 0.

Split

public static final Operator Split

Attempt to split into a parent and child of equal size and strength.

• If arg > 1, the minimum mass-energy to invest is arg times a max-strength min-size bug.

A child is only created if she would have at least the mass-energy of a max-strength min-size bug. Because bugs are ignored by their own Feel/Look/Bite operations, mother and child are invisible to each other's Feel/Look/Bite operations for a brief period following a Split.

Mate

public static final Operator Mate

Exchange genes with the nearest visible bug that is within Feel range. A new species is created by combining half the toplevel StatementList of each bug. The next child of each bug will be of this species.

Feel

public static final Operator Feel

Sense the nearest ZObject within MaxBiteRange and mass > InvisibilityThreshold * own mass. Sets $Gaze if an object was sensed, and sets stack top to whether an object was sensed.

Look

public static final Operator Look

Sense the nearest ZObject within MaxLookRange and mass > InvisibilityThreshold * own mass. Sets $Gaze if an object was sensed, and sets stack top to whether an object was sensed.

Mood

public static final Operator Mood

Copy the arg (or stack top) to the Mood register.

Pray

public static final Operator Pray

Send a message to the gods. Pushes any arg, then prints popped stack top on System.out.

Call

public static final Operator Call

Branch to the indicated Statement, and return at the end of its StatementList or when it Returns. Arg is the label or id of the Statement to which to branch.

Return

public static final Operator Return

Return to the Statement after the corresponding Call, or break from the enclosing While.

IfThen

public static final Operator IfThen

If stack top is true (nonzero/nonempty), evaluate arg. If stack top is not true and the next Statement is Else, then skips the Else.

Else

public static final Operator Else

If stack top is false (zero/empty), evaluate arg.

While

public static final Operator While

While stack top is true (nonzero/nonempty), evaluate arg.

Push

public static final Operator Push

Push the arg onto the stack. The stack size is limited to a function of bug age, so the deepest stack element might be discarded.

Pop

public static final Operator Pop

Pop the top off the stack.

Poke

public static final Operator Poke

Set the top of the stack.

Set

public static final Operator Set

Set a mapping in the heap, where arg is the map key and the stack top is the value. The heap size is limited to a function of bug age, so the oldest stack element might be discarded.

Get

public static final Operator Get

Copy a heap value to the stack, where arg is the map key. If the key is not found, copies 0.

And

public static final Operator And

Or

public static final Operator Or

Not

public static final Operator Not

Negate

public static final Operator Negate

Equals

public static final Operator Equals

LessThan

public static final Operator LessThan

GreaterThan

public static final Operator GreaterThan

Random

public static final Operator Random

Add

public static final Operator Add

Subtract

public static final Operator Subtract

Multiply

public static final Operator Multiply

Divide

public static final Operator Divide

Modulus

public static final Operator Modulus

AbsoluteVal

public static final Operator AbsoluteVal

Method Detail

values

public static Operator[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (Operator c : Operator.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static Operator valueOf(java.lang.String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

java.lang.IllegalArgumentException - if this enum type has no constant with the specified name

java.lang.NullPointerException - if the argument is null

whetherTurnContinues

public ZoelVM.Turn whetherTurnContinues()

fromString

public static Operator fromString(java.lang.String str)

random

public static Operator random(java.util.Random random)

pseudoRandom

public static Operator pseudoRandom(java.util.Random random)