cljs.spec.alpha/assert

macro

previously cljs.spec/assert

clojure.spec.alpha/assert

Edit

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Source docstring:

spec-checking assert expression. Returns x if x is valid? according
to spec, else throws an error with explain-data plus ::failure of
:assertion-failed.
Can be disabled at either compile time or runtime:
If *compile-asserts* is false at compile time, compiles to x. Defaults
to the negation value of the ':elide-asserts' compiler option, or true if
not set.
If (check-asserts?) is false at runtime, always returns x. Defaults to
value of 'cljs.spec.alpha/*runtime-asserts*', or false if not set. You can
toggle check-asserts? with (check-asserts bool).

(defmacro assert
  [spec x]
  `(if *compile-asserts*
     (if @#'*runtime-asserts*
       (assert* ~spec ~x)
       ~x)
    ~x))

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