6.100 Namespace

Defined in namespace Smalltalk

Category: Language-Implementation

I am a special form of dictionary. I provide special ways to access my keys, which typically begin with an uppercase letter. Classes hold on an instance of me; it is called their `environment').

My keys are (expected to be) symbols, so I use == to match searched keys to those in the dictionary -- this is done expecting it brings a bit more speed.

6.100.1 Namespace class: accessing		(class)
6.100.2 Namespace class: disabling instance creation		(class)
6.100.3 Namespace: accessing		(instance)
6.100.4 Namespace: namespace hierarchy		(instance)
6.100.5 Namespace: overrides for superspaces		(instance)
6.100.6 Namespace: printing		(instance)
6.100.7 Namespace: testing		(instance)

6.100.1 Namespace class: accessing

current

Answer the current namespace

current: aNamespace

Set the current namespace to be aNamespace.

6.100.2 Namespace class: disabling instance creation

new

Disabled - use #addSubspace: to create instances

new: size

Disabled - use #addSubspace: to create instances

6.100.3 Namespace: accessing

inheritedKeys

Answer a Set of all the keys in the receiver and its superspaces

6.100.4 Namespace: namespace hierarchy

siblings

Answer all the other namespaces that inherit from the receiver's superspace.

siblingsDo: aBlock

Evaluate aBlock once for each of the other namespaces that inherit from the receiver's superspace, passing the namespace as a parameter.

6.100.5 Namespace: overrides for superspaces

associationAt: key ifAbsent: aBlock

Return the key/value pair associated to the variable named as specified by `key'. If the key is not found search will be brought on in superspaces, finally evaluating aBlock if the variable cannot be found in any of the superspaces.

associationsDo: aBlock

Pass each association in the namespace to aBlock

at: key ifAbsent: aBlock

Return the value associated to the variable named as specified by `key'. If the key is not found search will be brought on in superspaces, finally evaluating aBlock if the variable cannot be found in any of the superspaces.

at: key ifPresent: aBlock

If aKey is absent from the receiver and all its superspaces, answer nil. Else, evaluate aBlock passing the associated value and answer the result of the invocation

do: aBlock

Pass each value in the namespace to aBlock

includesKey: key

Answer whether the receiver or any of its superspaces contain the given key

keysAndValuesDo: aBlock

Pass to aBlock each of the receiver's keys and values, in two separate parameters

keysDo: aBlock

Pass to aBlock each of the receiver's keys

set: key to: newValue ifAbsent: aBlock

Assign newValue to the variable named as specified by `key'. This method won't define a new variable; instead if the key is not found it will search in superspaces and evaluate aBlock if it is not found. Answer newValue.

size

Answer the number of keys in the receiver and each of its superspaces

6.100.6 Namespace: printing

name

Answer the receiver's name

nameIn: aNamespace

Answer Smalltalk code compiling to the receiver when the current namespace is aNamespace

storeOn: aStream

Store Smalltalk code compiling to the receiver

6.100.7 Namespace: testing

isSmalltalk

Answer `true'.