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.

lose: 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 code.
switch: 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.
!~magic!-internal!-symbol!~: 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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