81 lines
1.1 KiB
Text
81 lines
1.1 KiB
Text
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#lang scribble/manual
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@(require (for-label racket))
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@title{Message}
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A message to an object@section{categories}
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Language
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@section{related}
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Classes/MethodQuote
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@section{description}
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A message to an object, to be evaluated later.
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@section{CLASSMETHODS}
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@section{METHOD}
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new
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@section{argument}
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receiver
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the receiver of the message
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@section{argument}
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selector
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the method to be called
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@section{argument}
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args
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arguments to the call
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@section{INSTANCEMETHODS}
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@section{METHOD}
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receiver
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the object to which the message is relayed
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@section{METHOD}
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selector
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the method to be called
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@section{METHOD}
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args
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the arguments to the call
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@section{METHOD}
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value
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send the message to the receiver and call the selector with the arguments
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@section{argument}
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... moreArgs
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@section{private}
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storeArgs
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@section{EXAMPLES}
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@racketblock[
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// an object
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a = 36
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// a message to the object
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m = Message(a, \sqrt)
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// deliver the message
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m.value
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// -> 6
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// a message that lacks an argument
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m = Message(a, '+')
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// evaluate with the argument
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m.value(6)
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// -> 42
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m.value(-13)
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// -> 23
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]
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