Hi,
I've been working on the documentation for the object systems provided in SchemeSpheres here: http://www.schemespheres.org/guides/en/object-systems
I'll copy the meaning of the flag attributes and link to this documentation as well for reference.
Álvaro Castro-Castilla Digital Experiences. -- visit The Bloghttp://blog.fourthbit.com/
On Fri, May 2, 2014 at 11:31 AM, Mikael mikael.rcv@gmail.com wrote:
Dear Alvaro, can you please write up your insights on define-type on the Wiki? I believe there's a page already somewhere so it's just about clarifying and adding. Mikael
2014-05-01 10:45 GMT+02:00 Álvaro Castro-Castilla < alvaro.castro.castilla@gmail.com>:
The opaque: flag causes a change in the behavior of equal? and equal?-hash . When the opaque: flag is not used, two structures are equal? if they have the same type and each field is equal? in both structures. When the opaque: flag is used, two structures are equal? only if they are eq? (i.e. the same instance).
Awesome and very useful! So the code that checks for the opaque: flag in the Gambit sources is found in the equal? and equal-hash? definitions...
Thank you, Marc
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