<compiler> An algorithm which turns a term into a function of some
variable. The result of using bracket abstraction on T with respect to variable
v, written as [v]T, is a term containing no occurrences of v and denoting a
function f such that f v = T. This defines the function f = (\ v . T). Using
bracket abstraction and currying we can define a language without bound
variables in which the only operation is monadic function application.
br « brace « bracket « bracket abstraction »
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