This changes let to use a flat list of symbol-value pairs instead of a
vector of vectors. One side effect is that (let [[a 1] z]) is not
expressible now, and one will explicitly need to set a nil value for z,
such as: (let [a 1 z nil]).
Closes#713.
Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
* hy/contrib/anaphoric.hy: The following anaphoric macros have been
added
`ap-reject` : Opposite of ap-filter, yields the elements when a `pred`
evaluates to false
`ap-dotimes` : Execute body forms (possibly for side-effects) n times
with `it` bound from 0 to n-1
`ap-first` : return the first element that passes predicate
`ap-last` : return the last element that passes predicate
`ap-reduce`: anaphoric form of reduce that allows `acc` and `it` to
create a function that is applied over the list
* docs/contrib/anaphoric.rst: updated docs to reflect these changes
* tests/__init__.py: updated to explicitly include tests for anaphoric
macros
