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From: Walid Al-Ahmad <walid@cs.kuleuven.ac.be>
Newsgroups: comp.lang.beta
Subject: constant & private attributes
Date: Wed, 20 Nov 1996 11:51:34 +0100
Organization: Katholieke Universiteit Leuven
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Hello evreybody,

I have the following two questions for which I do not, directly, find
answer in the book of Madsen et al. :
1) How can I define constant (integer, real, ..) attributes in Beta ?
How is PI defined in the math library for example ?
2) Is it possible to manipulate attributes outside the pattern ? Are
they read-only variables like Eiffel's attributes ? Can I do something
like this :
A : (# x :@integer; ... #)
a : @A; 3->a.x