14 lines
374 B
Racket
14 lines
374 B
Racket
#lang racket/base
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;; "Instance" protocol for discriminating among
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;; otherwise-indistinguishable entities.
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(provide (struct-out instance))
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;; (instance Any Any), assertion or message
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;;
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;; In cases where `spec` can have multiple instantiations, serves to
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;; distinguish between them. Each `id` should be unique within its
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;; scope.
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;;
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(struct instance (id spec) #:prefab)
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