LazyEnvir | SuperCollider 3.12.2 Help

Description

Environment with deferred evaluation and default values.

Consequently, calculations can be done with nonexisting objects which can then be assigned later. Per default, a LazyEnvir returns instances of Maybe. See also Fdef.

NOTE: While the method put is treated as transparent and implicitly creates a placeholder, all other methods, like at, collect, do, etc. pass the placeholder. In order to retrieve the object itself, use .source - in order to reduce it to a value, use: value

Class Methods

Inherited class methods

Instance Methods

.put(key, obj)

Sets the value of the reference at key.

.at(key)

Returns a reference to the object at key.l = LazyEnvir.push; // default objects are created on access ~a; ~a.value; // defaults to nil // operations on placeholders ( ~c = ~a + ~b; ~c.value; // doesn't fail, instead returns nil ) // variables can be assigned later ( ~a = 800; ~b = { 1.0.rand }; ~c.value; ) // variables can be exchanged later ( ~b = { 1000.rand }; ~c.value; )

.copy

Copies the environment into a new one, with each placeholder being copied as well.

.localPut(key, obj)

Sets the value of the key directly. This method is mainly used internally.

.proxyClass

.proxyClass = value

Specify what placeholder object the environment uses by supplying a class name (Symbol). The default is a Maybe. Any object that responds to the methods source, source_ and clear can be a placeholder.// making a pattern space using LazyEnvir a = LazyEnvir.new; a.proxyClass=\PatternProxy; a.push; ~x = Pseq([1, 2, 30], 1); ~y = Pseq([~x], inf); z = ~y.asStream; z.next; z.next; z.next; ~x = Pseq([100, 2, 300], 1); z.next; z.next; z.next; a.pop;

.removeAt(key)

Removes the placeholder from the environment and clears it.

.makeProxy

Returns a new placeholder object. This is used internally and can be overridden to implement other lazy environments.

Inherited instance methods

helpfile source: /usr/local/share/SuperCollider/HelpSource/Classes/LazyEnvir.schelp
link::Classes/LazyEnvir::

LazyEnvir : EnvironmentRedirect : Object