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michaelochurch/macro-negative-arity

Created September 30, 2013 00:19
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Negative arity reproduction in Clojure macros.
Raw
macro-negative-arity
user=> (defn foo [x y z w v] 5764)
#'user/foo
user=> (defmacro bar (foo))
IllegalArgumentException Don't know how to create ISeq from: clojure.lang.Symbol clojure.lang.RT.seqFrom (RT.java:505)
user=> (defmacro bar [] (foo))
#'user/bar
user=> (defmacro baz [] (foo 1))
#'user/baz
user=> (defmacro qux [] (foo 1 2))
#'user/qux
user=> (bar)
ArityException Wrong number of args (-2) passed to: user$foo clojure.lang.Compiler.macroexpand1 (Compiler.java:6473)
user=> (baz)
ArityException Wrong number of args (-1) passed to: user$foo clojure.lang.Compiler.macroexpand1 (Compiler.java:6473)
user=> (qux)
ArityException Wrong number of args (0) passed to: user$foo clojure.lang.Compiler.macroexpand1 (Compiler.java:6473)
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