Ralf Hemmecke wrote:
>
> > That is weirdness of Boot: "-" is a symbol, while you need
> > quoted version, that is '"-" to get a string.
>
> Does that mean that in
> https://github.com/hemmecke/fricas-svn/blob/master/src/interp/i-output.boot#L255
>
> x is [["$elt",domain,"float"], x, y, z] and (domain = $DoubleFloat or
> domain is ['Float]) and INTEGERP x and INTEGERP y and INTEGERP z and
> z > 0 and (float :=
> getFunctionFromDomain("float",domain,[$Integer,$Integer,$PositiveInteger]))
> =>
> f := SPADCALL(x,y,z,float)
> o := coerceInteractive(mkObjWrap(f, domain), '(OutputForm))
> objValUnwrap o
>
> the first part could also be written (in boot) as
>
> x is [['$elt,domain,'float], ...
>
> or (maybe)
>
> '_$elt
>
More or less. I tend to use "$elt" form when there are any doubts
about proper quoting or quoting would be excessive. In the past
the "$elt" version was more reliable. Namely, Boot translator
performend substitutions on keywords, even on quoted ones. The
"$elt" version was immune to unwanted substitutions. I think
this problem is fixed now.
--
Waldek Hebisch
[email protected]
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