Transform an object to an iterator
as_iterator() is a generic function that transforms its input to
an iterator function. The default implementation
is as follows:
Functions are returned as is.
Other objects are assumed to be vectors with length() and [[
methods.
Methods must return functions that implement coro's iterator protocol.
as_iterator() is called by coro on the RHS of in in for
loops. This applies within generators, async functions, and loop().
as_iterator(x) ## Default S3 method: as_iterator(x)
x |
An object. |
An iterable function.
as_iterator(1:3) i <- as_iterator(1:3) loop(for (x in i) print(x))
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