i just ran across a situation where it would have been enormously
handy to be able to quickly remove arbitrary items from a list of
items.
in the same way that variables support the operations
VAR = fred barney
VAR += wilma betty
it would have been nice to be able to do:
VAR -= wilma bambam
the semantics being to remove (a la "filter-out") an arbitrary set of
matching strings. if an item is not a word in the string, then
nothing happens. no harm, no foul, with the result of the above
being that
VAR = fred barney betty
i realize i can get the same effect by, say, writing a macro involving
"filter-out", but is there a reason the above couldn't be done? i
just tried it and, a little to my surprise, i didn't get a syntax
error. it didn't do anything, of course, but make didn't complain.
does the above construct actually represent something in gnu make?
i don't see anything about it in the docs.
rday
p.s. the one problem i see is perhaps defining the meaning of
recursive expansion of such a construct, which might make all of this
moot.
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