Must useless expressions be evaluated?

vmicro1 at ucbtopaz.UUCP vmicro1 at ucbtopaz.UUCP
Fri Oct 14 12:43:51 AEST 1983

	I think useless expressions must be evaluated, simply because there is
no syntactic criterion to determine the uselessness of any expression. For
is not syntactically different from
but something() probably has side effects.

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