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From: Georg Bauhaus <sb463ba@l1-hrz.uni-duisburg.de>
Newsgroups: comp.lang.ada
Subject: Re: Concatenation and Characters
Date: Tue, 22 Oct 2002 12:05:27 +0000 (UTC)
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Dmitry A.Kazakov <mailbox@dmitry-kazakov.de> wrote:
: Secondly, your example refers to program semantics, not syntax. Semantics 
: cannot be checked or verified neither formally nor by a human being.

Hmmm....  Wasn't there something in SPARK...

: One of 
: good ideas of Ada design as I see it, was to *syntactically* mark the 
: constructs which are potentially dangerous, make them visible for both who 
: writes and who reads the program.

o.K. it is not built into the language, but a syntactically valid
subprogram a la

  procedure fill(bowl: out glass; filled: out boolean);

does inform readers about a potentially unsatisfying dring?

-- georg