5 Flags and Properties
Most of tags here are probably not much use to end-users, but I am noting them
as a matter of completeness.
- If a name is flagged as ttfamily lose then a subsequent attempt to
define or redefine it will be ignored.
s!:ppchar and s!:ppformat
- These are used in the prettyprint code
found in extras.red. A name is given a property s!:ppformat if
in prettyprinted display its first few arguments should appear on the
same line as it if at all possible. The s!:ppchar property is used to
make the display of bracket characters a little more tidy in the source
- In the Reduce parser some names are “switches”, and then
directives such as on xxx and off xx have the effect of setting or
clearing the value of a variable !*xxx. This is managed by setting the
switch flag om xxx. CSL sets some things as switches ready for when
they may be used by the Reduce parser.
- CSL does not have a clear representation
for functions that is separated from the representation of an identifier,
and so when you ask to get the value of a raw function you get an
identifier (probably a gensym) and this tag is used to link such values
with the symbols they were originally extracted from.
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