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Date: Sat, 20 Feb 2021 08:22:14 -0800 (PST)
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Subject: Re: set_index and and end_of_file with just a stream reference
From: Mehdi Saada <00120260a@gmail.com>
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Xref: reader02.eternal-september.org comp.lang.ada:61394
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"With protected subprograms, the caller only has to wait until no one
else is using the PO. "
Still, wouldn't an entry with no guard condition have the same semantic/effect ?

Thanks. Maybe an ebook on how to do with files/streams, not just the grammar but the semantics intended to go along with it, and strategies, would be great. Unless it already exists.