declareSignal: Declaring a signal field
In objectSignals: Observer Pattern for S4
declareSignal R Documentation
Declaring a signal field
Description
Declares a signal field that is lazily populated when the field is
first accessed. This avoids the need for the
constructor/initializer to explicitly create the signal.
Usage
declareSignal(expr)
Arguments
expr
The expression that names the signal and specifies its
signature. See the example.
Value
A list of field definitions, suitable for passing to
setRefClass.
Author(s)
Michael Lawrence
Examples
setRefClass("Dataset", fields = c(elements = "list",
declareSignal(elementsChanged(which))))
objectSignals documentation built on April 5, 2022, 9:05 a.m.
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| declareSignal | R Documentation |
Declaring a signal field
Description
Declares a signal field that is lazily populated when the field is first accessed. This avoids the need for the constructor/initializer to explicitly create the signal.
Usage
declareSignal(expr)
Arguments
expr |
The expression that names the signal and specifies its signature. See the example. |
Value
A list of field definitions, suitable for passing to
setRefClass.
Author(s)
Michael Lawrence
Examples
setRefClass("Dataset", fields = c(elements = "list",
declareSignal(elementsChanged(which))))
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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