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1 (cl:in-package #:amuse)
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2
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3 ;; Some conditions we might want to be able to signal
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4
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5 (define-condition undefined-action (condition)
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6 ;; This condition would apply to an attempt to perform a meaningless
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7 ;; operation on an object. This may, initially, include things that
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8 ;; are a pain to implement but should really be used when it's
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9 ;; genuinely unclear what an operation means in the given
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10 ;; context. In such cases, a condition handler might be the best
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11 ;; approach anyway.
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12 ((operation :initarg :operation
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13 :reader undefined-action-operation)
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14 (datatype :initarg :datatype
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15 :reader undefined-action-datatype))
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16 (:report (lambda (condition stream)
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17 (format stream "The consequence of performing ~A on an object of type ~A is undefined."
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18 (undefined-action-operation condition)
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19 (undefined-action-datatype condition)))))
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20
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21 (define-condition insufficient-information (condition)
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22 ;; It should be possible to construct genuinely minimal musical
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23 ;; structures. When the information in these is insufficient to
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24 ;; answer a query, this condition should be raised.
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25 ((operation :initarg :operation
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26 :reader insufficient-information-operation)
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27 (datatype :initarg :datatype
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28 :reader insufficient-information-datatype))
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29 (:report (lambda (condition stream)
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30 (format stream "The ~A object does not contain enough information to perform ~A."
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31 (insufficient-information-datatype condition)
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32 (insufficient-information-operation condition)))))
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33
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34
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