> I must admit that currently I plan to have parameterless
> system domains. In such case search for right function
> can be done at compile time. Also, for parameterless
> domains variables can be stored outside domain vector,
> so that the survive ')lib' without any extra effort.
OK, that would be sufficient as FormattetOutut comes without parameters.
I guess, it would still be a problem, since the variable here contains
pointers to other domains that might change their address, right?
Ralf
FormattedOutput: Exports == Implementation where
OFC ==> OutputFormatterCategory
Exports ==> OFC with
setFormats!: List OFC -> Void
++ \spad{setFormats!(l)} takes a list \spad{l} of formatters and
++ sets this for future output in a session.
Implementation ==> add
Rep ==> Record(out: OutputForm, step: Integer)
import from Rep
rep x ==> (x@%) pretend Rep
per x ==> (x@Rep) pretend %
formatters: Reference List OFC := ref empty()
setFormats!(l: List OFC): Void == setelt!(formatters, l)
convert(e: OutputForm, n: Integer): % == per [e, n]
display(x: %): Void ==
for F in deref formatters repeat
display(convert(rep(x).out, rep(x).step)$F)$F
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