77 lines
2.1 KiB
Text
77 lines
2.1 KiB
Text
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#lang scribble/manual
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@(require (for-label racket))
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@title{EnvironmentRedirect}
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base class for environment redirects@section{categories}
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Libraries>JITLib>Environments, Collections>Unordered, Live Coding
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@section{related}
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Classes/Environment
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@section{description}
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Environment that redirects access (strong::put::) and assignment (strong::at::). It is used as a base class for redirecting Environments. For example uses, see link::Classes/LazyEnvir:: and link::Classes/ProxySpace::.
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@section{ClassMethods}
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@section{method}
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new
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Create new environment redirect, if envir is given, it is used as a basis.
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@section{subsection}
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replacing Environment class methods
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EnvironmentRedirect implements some of the interface of link::Classes/Environment::
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@section{method}
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push, pop, make, use
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@section{InstanceMethods}
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@section{method}
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envir
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return or replace the source environment
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@racketblock[
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e = LazyEnvir.new;
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e.put(\x, 9);
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e.envir; // look into the envir itself: for a LazyEnvir it contains Maybe as placeholders
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::
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]
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@section{subsection}
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redirecting objects
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Overriding these methods, one can redirect where objects go when they are assigned to the space. This is done for example in link::Classes/LazyEnvir:: and link::Classes/ProxySpace::.
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@section{method}
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at, put, localPut, removeAt
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@section{method}
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dispatch
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A function or object that is called when the environment is modified. The key and the changed object are passed as arguments.
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@racketblock[
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e = LazyEnvir.new;
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e.dispatch = { |key, val| [key, val].postln };
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e.put(\x, 9);
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::
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]
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@section{subsection}
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replacing Environment instance methods
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EnvironmentRedirect implements some of the interface of link::Classes/Environment::, which it can replace where needed.
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@section{method}
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push, pop, make, use, do, clear, keysValuesDo, keysValuesArrayDo, findKeyForValue, sortedKeysValuesDo, choose, know, doesNotUnderstand
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@section{section}
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Networking
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EnvironmentRedirect and its subclasses can be used to dispatch assignment over a network. To do this, a dispatch function can be supplied - see Public in strong::JITLibExtensions:: quark.
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