changequote(`[',`]')
define([BEGIN],[dnl])
define([END],[dnl])
BEGIN. calc(X)(y)=>`X(...y)'
define([calc],[$1(pushdef([$1],[_$1])define([_$1],[$@,)])])_$1([$@)])
dnl X( - - - - - - - - - - - - - - - - - - - - - - - - ->\
dnl -->\ |
dnl |pushdef(X,_X) |
dnl +-----------------+ |
dnl |define(_X),`$@,)' |
dnl +---------------------+ |
dnl |_X(...y) |
dnl +-------->)
END.
divert[]dnl
calc(eval)(1+1)
Define a macro that returns by invoking its anonymous arg$1 expecting the result of collecting arguments
during its redefinition when it would be invoked.
This is currying over arguments on a built-in macro-that accepts-numeric-input. Thus calc() has a type by
means of the operations restricted to it by -jection; invoking it with the resulting collected list as arguments.
Cheers
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