[#CLJ-721] A record? predicate would complement defrecord - Clojure JIRA

Details

Type: Enhancement
Status: Closed
Priority: Minor
Resolution: Duplicate
Affects Version/s: Backlog
Fix Version/s: None
Component/s: None
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Description

To improve Midje checkers/assertions, it'd be useful if we could ask an object if it were a-maplike-object-due-to-defrecord, rather than just ask it #'map?

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Alex Miller added a comment - 19/Jan/11 8:59 PM - edited

I have also run into the need to do this when implementing multimethods where records were treated in a specific way (for printing for example).

We wrapped defmacro to install a multimethod implementation of a record? function at record definition time but that's not a generic solution.

I imagine it would be easy for defrecord to construct a class that implements a marker IRecord interface that is checked by a record? predicate.

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Alex Miller added a comment - 19/Jan/11 8:59 PM - edited I have also run into the need to do this when implementing multimethods where records were treated in a specific way (for printing for example). We wrapped defmacro to install a multimethod implementation of a record? function at record definition time but that's not a generic solution. I imagine it would be easy for defrecord to construct a class that implements a marker IRecord interface that is checked by a record? predicate.

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Alex Miller added a comment - 19/Jan/11 9:03 PM

In searching I noticed there is already a CLJ-394 which contains this (plus request for a marker on deftype).

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Alex Miller added a comment - 19/Jan/11 9:03 PM In searching I noticed there is already a CLJ-394 which contains this (plus request for a marker on deftype).

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Assignee:

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Reporter:

Brian Marick

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Dates

Created:

19/Jan/11 8:11 PM

Updated:

20/Apr/12 1:57 PM

Resolved:

20/Apr/12 1:57 PM