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Referents: final destinations
Prerequisite Concepts		Related Syntax

The following are the possible final destinations for which all referents written to them must be resolvable:

• a file
• an externally defined output stream, or
• a buffer attached to a stream, the scope of whose name is more global than the referent set of the buffer

In the last case, the buffer loses its referents-allowed property. It will become either referents-not-allowed or referents-displayed. There are two cases in which a stream's attachment is not written to its final destination:

• If there is a buffer, with referents-allowed, attached to a stream declared in a local scope, and if the referent set of that stream is more global than the scope of the stream's name, then no attempt is made to write the buffer's contents to its "final destination", either at the end of the scope of the stream's name or at the end of the referent scope of the stream. The stream and the buffer attached to it are discarded at the end of the scope of the stream's name without "collapsing" it.
• A referent is never written to its "final destination". When a stream that has had referents written to it is used as a value (that is, copied to another stream or output), its text is written to the final destination but any referents in it are themselves (recursively) expanded in the same manner. The effect is that only the text previously written to referents is written to a final destination. It is an error for this recursive process not to stop for a given referent.

Both these cases are characterized by the fact that they both become "invisible" outside of their local scope or referent set -- and there is therefore no need to resolve them. A referent's contents (a.k.a. "effective value") may be used in the resolution of some other stream, but a referent itself ceases to exist outside of its own scope.

Prerequisite Concepts      Referents

Related Syntax    file    referents-allowed    referents-displayed    referents-not-allowed

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