Re: Should undefined behavior be encouraged in Emacs?

[Richard Stallman]

    Undefined behavior is something that is left to the implementation,
    and the programmer who invokes it cannot expect anything in
    particular.

This definition is used in standards development, and presumes that
we're talking about a spec that might have various implementations.
However, Emacs is one specific program, not a spec.  Thus, concepts
from standards development, about the relationship between the spec
and its various implementations, may not transfer naturally.  I don't
see what "undefined behavior" would mean in the case of Emacs.

-- 
Dr Richard Stallman
President, Free Software Foundation
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