gnu.mapping
Class Environment

java.lang.Object
  |
  +--gnu.mapping.Procedure
        |
        +--gnu.mapping.Procedure1
              |
              +--gnu.mapping.NameMap
                    |
                    +--gnu.mapping.Environment

Direct Known Subclasses:

ObArray, ScmEnv

public class Environment

extends NameMap

An environment contains (name->value) bindings. Names are Strings that are compared by ==, not equal.

Field Summary

protected TrivialConstraint	trivialConstraint
protected Constraint	unboundConstraint

Fields inherited from class gnu.mapping.Procedure

noArgs, sym_name

Constructor Summary

Environment()

Environment(Environment previous)

Environment(int capacity)

Method Summary

void	addBinding(Binding binding)
Binding	addBinding(java.lang.String name, java.lang.Object value)
static Environment	current() Deprecated.
static void	define_global(java.lang.String name, java.lang.Object new_value) Define name (interned) to have a given value.
Binding	define(java.lang.String name, java.lang.Object value)
static void	defineFunction(Environment env, java.lang.String name, java.lang.Object new_value)
static void	defineFunction(java.lang.String name, java.lang.Object new_value)
Binding	getBinding(java.lang.String name)
java.lang.Object	getChecked(java.lang.String name) Get the value bound to the given name.
static Environment	getCurrent()
static Binding	getCurrentBinding(java.lang.String name)
static java.lang.Object	lookup_global(java.lang.String name)
Binding	lookup(java.lang.String name) Search for a variable binding by name.
static void	put_global(java.lang.String name, java.lang.Object new_value) Define name (interned) to have a given value.
java.lang.Object	put(java.lang.Object name, java.lang.Object value)
java.lang.Object	put(java.lang.String name, java.lang.Object value)
void	remove(Binding binding)
java.lang.Object	remove(java.lang.Object name)
java.lang.Object	remove(java.lang.String name)
static void	setCurrent(Environment env)
java.lang.String	toString()
static Environment	user()

Methods inherited from class gnu.mapping.NameMap

apply1, get, set1

Methods inherited from class gnu.mapping.Procedure1

apply0, apply2, apply3, apply4, applyN, numArgs

Methods inherited from class gnu.mapping.Procedure

apply, checkArgCount, getName, getSetter, maxArgs, minArgs, name, print, set0, setN, setName

Methods inherited from class java.lang.Object

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

Field Detail

trivialConstraint

protected TrivialConstraint trivialConstraint

unboundConstraint

protected Constraint unboundConstraint

Constructor Detail

Environment

public Environment()

Environment

public Environment(int capacity)

Environment

public Environment(Environment previous)

Method Detail

user

public static Environment user()

lookup_global

public static java.lang.Object lookup_global(java.lang.String name)
                                      throws UnboundSymbol

define_global

public static void define_global(java.lang.String name,
                                 java.lang.Object new_value)

Define name (interned) to have a given value.

defineFunction

public static void defineFunction(java.lang.String name,
                                  java.lang.Object new_value)

defineFunction

public static void defineFunction(Environment env,
                                  java.lang.String name,
                                  java.lang.Object new_value)

put_global

public static void put_global(java.lang.String name,
                              java.lang.Object new_value)

Define name (interned) to have a given value.

current

public static Environment current()

Deprecated.

getCurrent

public static Environment getCurrent()

setCurrent

public static void setCurrent(Environment env)

getBinding

public Binding getBinding(java.lang.String name)

getCurrentBinding

public static Binding getCurrentBinding(java.lang.String name)

lookup

public Binding lookup(java.lang.String name)

Search for a variable binding by name.

Parameters:

sym - the (interned) name of the binding to search for

Returns:

the value of the binding, or null if not found

define

public Binding define(java.lang.String name,
                      java.lang.Object value)

addBinding

public void addBinding(Binding binding)

addBinding

public Binding addBinding(java.lang.String name,
                          java.lang.Object value)

remove

public java.lang.Object remove(java.lang.String name)

remove

public java.lang.Object remove(java.lang.Object name)

remove

public void remove(Binding binding)

getChecked

public java.lang.Object getChecked(java.lang.String name)

Get the value bound to the given name.

Overrides:

getChecked in class NameMap

Throws:

UnboundSymbol - the name has no binding

See Also:

NameMap.get(Object)

put

public java.lang.Object put(java.lang.String name,
                            java.lang.Object value)

Overrides:

put in class NameMap

put

public java.lang.Object put(java.lang.Object name,
                            java.lang.Object value)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object