Folks,
has someone ever written a `safe define' macro that makes the defined
macro expands to itself if called without any argument?
sdefine({foo}, {bar})
foo => foo
foo() => bar
I tried the following, and I failed (due to lack of experience
w.r.t. quoting tricks, I think) – I have difficulties to delay the
expansion of `$#'...
Below, I've marked the problematic spots with (nonexisting)
pseudo-functions.
define({sdefine},
{define({$1},
{ifelse(delay_expansion_of({$#}),
{0},
{{$1}},
{expand_at_definition_time(shift($@))})})})
Werner
