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guard-nil: ensure non-nil argument, raise descriptive exception otherwise
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| (defmacro guard-nil | |
| "Returns `x` unless it is nil, in which case a descriptive exception is raised" | |
| [x] | |
| `(if-some [v# ~x] | |
| v# | |
| (throw (AssertionError. (str "Form should not be nil: " (pr-str '~x)))))) |
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