Related articles |
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SUMMARY: Code Generation for Switch Statements spuler@coral.cs.jcu.edu.au (1992-05-25) |
Language standards vary (was Code Generation for Switch Statements) diamond@jit081.enet.dec.com (Norman Diamond) (1992-05-27) |
Newsgroups: | comp.compilers |
From: | Norman Diamond <diamond@jit081.enet.dec.com> |
Keywords: | code, standards |
Organization: | Compilers Central |
References: | 92-05-135 |
Date: | Wed, 27 May 1992 07:34:27 GMT |
David Spuler quotes Hank Dietz:
>BTW, the C and Pascal constructs are VERY different -- and I'm not just
>talking about the fact that C cases can fall through. Pascal explicitly
>states that values not listed cause undefined behavior, whereas C promises
>that such values cause all cases to be skipped.
The C and Pascal standards are VERY different. Pascal explicity states that
values not listed cause dynamic violations, which MUST be diagnosed by
conforming implementations.
As a general rule, language standards vary immensely in the amount of error
checking that they require, and in what kind of misbehavior is allowed to
occur. It is advisable to RTFS.
-- Norman Diamond diamond@jit081.enet.dec.com
[Aha. So the switch code is really the same, except that in Pascal the
default case always goes to an error routine. -John]
--
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