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# `subject`

Smalltalk dependent handling predicates.

Author: Paulo Moura
Version: 1:0:0
Date: 2003-02-09
Compilation flags:
`static`
Dependencies:
(none)
Remarks:
(none)
Inherited public predicates:
(none)

- Public predicates

  - `changed/0`

  - `changed/1`

  - `dependents/1`

  - `addDependent/1`

  - `removeDependent/1`

- Protected predicates

- Private predicates

  - `dependent_/1`

- Operators

## Public predicates

### `changed/0`

Receiver changed in some way. Notify all dependents.

Compilation flags:
`static`
Mode and number of proofs:
`changed` - `one`

### `changed/1`

Receiver changed as specified in the argument. Notify all dependents.

Compilation flags:
`static`
Template:
`changed(Change)`
Mode and number of proofs:
`changed(?nonvar)` - `one`

### `dependents/1`

Returns a list of all dependent objects.

Compilation flags:
`static`
Template:
`dependents(Dependents)`
Mode and number of proofs:
`dependents(-list)` - `one`

### `addDependent/1`

Adds a new dependent object.

Compilation flags:
`static`
Template:
`addDependent(Dependent)`
Mode and number of proofs:
`addDependent(@object)` - `one`

### `removeDependent/1`

Removes a dependent object.

Compilation flags:
`static`
Template:
`removeDependent(Dependent)`
Mode and number of proofs:
`removeDependent(?object)` - `zero_or_more`

## Protected predicates

(none)

## Private predicates

### `dependent_/1`

Table of dependent objects.

Compilation flags:
`dynamic`
Template:
`dependent_(Dependent)`
Mode and number of proofs:
`dependent_(?object)` - `zero_or_more`

## Operators

(none)

See also

observer